svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultCompiler.java @ 46082
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package org.gvsig.expressionevaluator.impl; |
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|
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.Stack; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Compiler; |
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import org.gvsig.expressionevaluator.LexicalAnalyzer; |
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import org.gvsig.expressionevaluator.LexicalAnalyzer.Token; |
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import org.gvsig.expressionevaluator.Code; |
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import org.gvsig.expressionevaluator.Code.Callable; |
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import org.gvsig.expressionevaluator.CodeBuilder; |
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import org.gvsig.expressionevaluator.Codes; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_DICT; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.ExpressionSyntaxException; |
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import org.gvsig.expressionevaluator.GrammarSet; |
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import org.gvsig.expressionevaluator.Statement; |
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import org.gvsig.expressionevaluator.Statement.StatementContext; |
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import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
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import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseConstant; |
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import org.gvsig.expressionevaluator.impl.function.operator.NegOperator; |
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import org.gvsig.expressionevaluator.impl.function.programming.CodeBlockFunction; |
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import org.gvsig.expressionevaluator.spi.AbstractLexicalAnalyzer; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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|
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public class DefaultCompiler implements Compiler { |
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|
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protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultCompiler.class); |
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|
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class DefaultStatementContext implements StatementContext { |
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|
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private class State { |
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public String codeClassifier; |
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public Map<String,Code> codes; |
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public Object otherValues; |
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} |
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|
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private State state;
|
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private final Stack<State> states; |
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|
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public DefaultStatementContext() {
|
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this.state = new State(); |
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this.states = new Stack<>(); |
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} |
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|
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@Override
|
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public void save_state() { |
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this.trace("save_state"); |
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((AbstractLexicalAnalyzer)lexer).save_state(); |
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this.states.push(state);
|
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} |
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|
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@Override
|
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public void restore_state() { |
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((AbstractLexicalAnalyzer)lexer).restore_state(); |
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state = this.states.pop();
|
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this.trace("restore_state"); |
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} |
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|
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@Override
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public void drop_state() { |
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((AbstractLexicalAnalyzer)lexer).drop_state(); |
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this.states.pop();
|
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this.trace("drop_state"); |
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} |
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|
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@Override
|
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public Compiler getCompiler() { |
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return DefaultCompiler.this;
|
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} |
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|
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@Override
|
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public LexicalAnalyzer getLexicalAnalyzer() {
|
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return lexer;
|
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} |
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|
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@Override
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public void setCode(String id, Code code) { |
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if( this.state.codes == null ) { |
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this.state.codes = new HashMap<>(); |
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} |
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if( !StringUtils.isBlank(this.state.codeClassifier) ) { |
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if( id.contains("#") ) { |
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id = StringUtils.replace(id,"#",this.state.codeClassifier,1); |
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} |
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} |
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this.state.codes.put(id.toUpperCase(), code);
|
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} |
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|
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@Override
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public Code getCode(String id) { |
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if( this.state==null || this.state.codes==null ) { |
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return null; |
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} |
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if( StringUtils.isBlank(id) ) {
|
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return null; |
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} |
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return this.state.codes.get(id.toUpperCase()); |
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} |
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|
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@Override
|
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public void setOtherValues(Object otherValues) { |
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this.state.otherValues = otherValues;
|
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} |
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|
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@Override
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public void setCodeClassifier(String classifier) { |
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this.state.codeClassifier = classifier;
|
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} |
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|
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@Override
|
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public Object getOtherValues() { |
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return this.state.otherValues; |
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} |
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|
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@Override
|
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public String getCodeClassifier() { |
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return this.state.codeClassifier; |
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} |
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|
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@Override
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public CodeBuilder getCodeBuilder() {
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return codeBuilder;
|
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} |
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|
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@Override
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public Token look_token() {
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return lexer.look();
|
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} |
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|
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@Override
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public Token next_token() {
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return lexer.next();
|
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} |
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|
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@Override
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public Code parse_expression(boolean allow_assignement) { |
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return DefaultCompiler.this.parse_expression(allow_assignement);
|
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} |
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|
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@Override
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public Codes parse_expressions(String separator) { |
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return DefaultCompiler.this.parse_expressions(separator);
|
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} |
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|
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@Override
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public boolean isReservedWord(String s) { |
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return grammars.isReservedWord(s);
|
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} |
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|
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@Override
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public void trace(String msg) { |
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// LexicalAnalyzer lex = this.getLexicalAnalyzer();
|
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// String s = StringUtils.left(lex.getSource(), lex.getPosition()) + "[*]" + StringUtils.mid(lex.getSource(), lex.getPosition(), 200);
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// if( s.length()>200 ) {
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// s = "..."+StringUtils.mid(s, lex.getPosition()-100, 200)+"...";
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// }
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// System.out.println(msg+". "+s);
|
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} |
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} |
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|
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private boolean objectAccessSupported; |
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private LexicalAnalyzer lexer;
|
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private CodeBuilder codeBuilder;
|
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private final GrammarSet grammars; |
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protected ExpressionEvaluatorManager manager;
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//
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// https://www.postgresql.org/docs/9.1/static/functions.html
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//
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|
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public DefaultCompiler(ExpressionEvaluatorManager manager) {
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this.manager = manager;
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this.grammars = new DefaultGrammarSet(); |
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this.lexer = new SQLLexicalAnalyzer(); |
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this.codeBuilder = new DefaultCodeBuilder(manager); |
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this.objectAccessSupported = true; |
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} |
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|
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@Override
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public Compiler clone() throws CloneNotSupportedException { |
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DefaultCompiler other = (DefaultCompiler) super.clone();
|
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other.lexer = lexer.clone(); |
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other.codeBuilder = codeBuilder.clone(); |
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|
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return other;
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} |
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|
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@Override
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public void setLexicalAnalyzer(LexicalAnalyzer lexer) { |
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this.lexer = lexer;
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} |
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|
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@Override
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public LexicalAnalyzer getLexicalAnalyzer() {
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return this.lexer; |
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} |
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|
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@Override
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public void setCodeBuilder(CodeBuilder codeBuilder) { |
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this.codeBuilder = codeBuilder;
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} |
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|
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@Override
|
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public CodeBuilder getCodeBuilder() {
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return this.codeBuilder; |
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} |
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|
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@Override
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public boolean isObjectAccessSupported() { |
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return this.objectAccessSupported; |
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} |
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|
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@Override
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public void setObjectAccessSupported(boolean objectAccessSupported) { |
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this.objectAccessSupported = objectAccessSupported;
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} |
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|
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@Override
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public GrammarSet getGrammars() {
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return this.grammars; |
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} |
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|
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@Override
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public Code compileExpression(String expression) { |
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if( StringUtils.isBlank(expression) ) {
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return this.getCodeBuilder().constant(null); |
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} |
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this.lexer.setSource(expression.trim());
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Code code = parse_expression(); |
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if( !this.lexer.isEOF() ) { |
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throw new ExpressionSyntaxException(lexer); |
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} |
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return code;
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} |
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|
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public Code parse_expression() {
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return this.parse_expression(true); |
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} |
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|
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public Code parse_expression(boolean allow_assignement) { |
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Code code = parse_relational(); |
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if( code != null && allow_assignement) { |
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Token token = lexer.look(); |
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if( token.is("AS") ) { |
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lexer.next(); |
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token = lexer.look(); |
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if( token.getType() != Token.IDENTIFIER ) {
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throw new ExpressionSyntaxException( |
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I18N.An_identifier_was_expected_and_XliteralX_was_found(token.getLiteral()), |
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lexer |
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); |
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} |
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token = lexer.next(); |
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code = codeBuilder.let(token.getLiteral(),code); |
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} |
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} |
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return code;
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} |
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|
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public Code parse_relational() {
|
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Code op1 = parse_not(); |
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Code op2; |
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while( true ) { |
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Token token = lexer.look(); |
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switch( token.getType() ) {
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case Token.OP_OR:
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lexer.next(); |
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op2 = parse_not(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_OR_operator(),lexer); |
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} |
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op1 = codeBuilder.or(op1, op2); |
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break;
|
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case Token.OP_AND:
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lexer.next(); |
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op2 = parse_not(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_AND_operator(),lexer); |
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} |
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op1 = codeBuilder.and(op1, op2); |
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break;
|
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default:
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return op1;
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} |
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} |
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} |
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|
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public Code parse_not() {
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Code op1; |
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Token token = lexer.look(); |
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if( token.getType() == Token.OP_NOT ) {
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lexer.next(); |
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op1 = parse_conditional(); |
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op1 = codeBuilder.not(op1); |
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} else {
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op1 = parse_conditional(); |
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} |
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return op1;
|
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} |
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|
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public Code parse_conditional() {
|
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Code op1 = parse_sum(); |
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Code op2; |
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while( true ) { |
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Token token = lexer.look(); |
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switch( token.getType() ) {
|
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case Token.OP_LT:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_LT_operator(),lexer); |
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} |
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op1 = codeBuilder.lt(op1, op2); |
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break;
|
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case Token.OP_GT:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_GT_operator(),lexer); |
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} |
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op1 = codeBuilder.gt(op1, op2); |
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break;
|
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case Token.OP_LE:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_LE_operator(),lexer); |
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} |
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op1 = codeBuilder.le(op1, op2); |
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break;
|
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case Token.OP_GE:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_GE_operator(),lexer); |
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} |
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op1 = codeBuilder.ge(op1, op2); |
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break;
|
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case Token.OP_EQ:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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token = lexer.look(); |
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String tip = null; |
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switch(token.getType()) {
|
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case Token.OP_GT:
|
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tip = I18N.The_operator_greater_than_or_equal_is_ge(); |
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break;
|
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case Token.OP_LT:
|
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tip = I18N.The_operator_less_than_or_equal_is_ge(); |
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break;
|
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} |
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throw new ExpressionSyntaxException( |
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I18N.Cant_recognize_the_second_operand_of_EQ_operator(), |
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lexer, |
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tip |
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); |
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} |
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op1 = codeBuilder.eq(op1, op2); |
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break;
|
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case Token.OP_NE:
|
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lexer.next(); |
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_NEQ_operator(),lexer); |
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} |
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op1 = codeBuilder.ne(op1, op2); |
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break;
|
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case Token.PRED_IS: {
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lexer.next(); |
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Token next = lexer.look(); |
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switch(next.getType()) {
|
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case Token.NOTNULL:
|
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lexer.next(); |
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op1 = codeBuilder.is(op1, codeBuilder.constant(null));
|
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op1 = codeBuilder.not(op1); |
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break;
|
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case Token.OP_NOT:
|
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lexer.next(); |
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next = lexer.look(); |
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if( next.getType() == Token.NULL ) {
|
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lexer.next(); |
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op1 = codeBuilder.is(op1, codeBuilder.constant(null));
|
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} else {
|
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op2 = parse_sum(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_IS_operator(),lexer); |
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} |
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op1 = codeBuilder.is(op1, op2); |
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} |
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op1 = codeBuilder.not(op1); |
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break;
|
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case Token.NULL:
|
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lexer.next(); |
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op1 = codeBuilder.is(op1, codeBuilder.constant(null));
|
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break;
|
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default:
|
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op2 = parse_sum(); |
402 |
if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_IS_operator(),lexer); |
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} |
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op1 = codeBuilder.is(op1, op2); |
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} |
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} |
408 |
break;
|
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case Token.ISNULL:
|
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lexer.next(); |
411 |
op1 = codeBuilder.is(op1, codeBuilder.constant(null));
|
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break;
|
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case Token.OP_REGEXP:
|
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lexer.next(); |
415 |
op2 = parse_sum(); |
416 |
if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_REGEXP_operator(),lexer); |
418 |
} |
419 |
op1 = codeBuilder.regexp(op1, op2); |
420 |
break;
|
421 |
case Token.PRED_LIKE:
|
422 |
lexer.next(); |
423 |
op2 = parse_sum(); |
424 |
if( op2==null ) { |
425 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_LIKE_operator(),lexer); |
426 |
} |
427 |
op1 = codeBuilder.like(op1, op2); |
428 |
break;
|
429 |
case Token.PRED_ILIKE:
|
430 |
lexer.next(); |
431 |
op2 = parse_sum(); |
432 |
if( op2==null ) { |
433 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_ILIKE_operator(),lexer); |
434 |
} |
435 |
op1 = codeBuilder.ilike(op1, op2); |
436 |
break;
|
437 |
default:
|
438 |
return op1;
|
439 |
} |
440 |
} |
441 |
} |
442 |
|
443 |
public Code parse_sum() {
|
444 |
Code op1 = parse_factor(); |
445 |
Code op2; |
446 |
while( true ) { |
447 |
Token token = lexer.look(); |
448 |
switch( token.getType() ) {
|
449 |
case Token.OP_CONCAT:
|
450 |
lexer.next(); |
451 |
op2 = parse_factor(); |
452 |
op1 = codeBuilder.concat(op1, op2); |
453 |
break;
|
454 |
case Token.OP_ADD:
|
455 |
lexer.next(); |
456 |
op2 = parse_factor(); |
457 |
op1 = codeBuilder.add(op1, op2); |
458 |
break;
|
459 |
case Token.OP_SUBST:
|
460 |
lexer.next(); |
461 |
op2 = parse_factor(); |
462 |
op1 = codeBuilder.subst(op1, op2); |
463 |
break;
|
464 |
default:
|
465 |
return op1;
|
466 |
} |
467 |
} |
468 |
} |
469 |
|
470 |
public Code parse_factor() {
|
471 |
Code op1 = parse_getattr(); |
472 |
Code op2; |
473 |
while( true ) { |
474 |
Token token = lexer.look(); |
475 |
switch( token.getType() ) {
|
476 |
case Token.OP_MULT:
|
477 |
lexer.next(); |
478 |
op2 = parse_getattr(); |
479 |
if( op2==null ) { |
480 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_MULT_operator(),lexer); |
481 |
} |
482 |
op1 = codeBuilder.mult(op1, op2); |
483 |
break;
|
484 |
case Token.OP_DIV:
|
485 |
lexer.next(); |
486 |
op2 = parse_getattr(); |
487 |
if( op2==null ) { |
488 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_DIV_operator(),lexer); |
489 |
} |
490 |
op1 = codeBuilder.div(op1, op2); |
491 |
break;
|
492 |
case Token.OP_MOD:
|
493 |
lexer.next(); |
494 |
op2 = parse_getattr(); |
495 |
if( op2==null ) { |
496 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_MOD_operator(),lexer); |
497 |
} |
498 |
op1 = codeBuilder.mod(op1, op2); |
499 |
break;
|
500 |
case Token.OPEN_BRACKET:
|
501 |
lexer.next(); |
502 |
Code codeIndex = parse_expression(); |
503 |
if( codeIndex == null ) { |
504 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
505 |
} |
506 |
token = lexer.look(); |
507 |
if( token.getType()!=Token.CLOSED_BRACKET) {
|
508 |
throw new ExpressionSyntaxException(I18N.A_XTokenX_was_expected_and_XliteralX_was_found("]", token.getLiteral()),lexer); |
509 |
} |
510 |
lexer.next(); |
511 |
Code code = codeBuilder.getitem(op1, codeIndex); |
512 |
return code;
|
513 |
default:
|
514 |
return op1;
|
515 |
} |
516 |
} |
517 |
} |
518 |
|
519 |
public Code parse_getattr() {
|
520 |
Code op1 = parse_colon(); |
521 |
if( !isObjectAccessSupported() ) {
|
522 |
return op1;
|
523 |
} |
524 |
while( true ) { |
525 |
Token next = lexer.look(); |
526 |
switch( next.getType() ) {
|
527 |
case Token.OP_GETATTR:
|
528 |
lexer.next(); |
529 |
next = lexer.look(); |
530 |
if( next.getType()!=Token.IDENTIFIER ) {
|
531 |
throw new ExpressionSyntaxException( |
532 |
I18N.An_attribute_identifier_was_expected_and_XliteralX_was_found(next.getLiteral()), |
533 |
lexer |
534 |
); |
535 |
} |
536 |
String id = (String) next.getLiteral(); |
537 |
lexer.next(); |
538 |
next = lexer.look(); |
539 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
540 |
lexer.next(); |
541 |
Codes args = parse_expressions(",");
|
542 |
next = lexer.next(); |
543 |
if( next.getType() != Token.PARENTHESIS_CLOSE ) {
|
544 |
throw new ExpressionSyntaxException( |
545 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
546 |
lexer |
547 |
); |
548 |
} |
549 |
op1 = codeBuilder.method(op1, id, args); |
550 |
} else {
|
551 |
op1 = codeBuilder.getattr(op1, id); |
552 |
} |
553 |
break;
|
554 |
default:
|
555 |
return op1;
|
556 |
} |
557 |
} |
558 |
} |
559 |
|
560 |
public Code parse_colon() {
|
561 |
Token token = lexer.look(); |
562 |
if( token.getType() == Token.COLON ) {
|
563 |
// Con esto pretendemos simular el uso de los ":" de SQLJ.
|
564 |
//
|
565 |
// https://docs.oracle.com/cd/A87860_01/doc/java.817/a83723/blangfe3.htm
|
566 |
// Basic Host Expression Syntax
|
567 |
//
|
568 |
// Solo estamos dando soporte al especificador de modo "IN".
|
569 |
lexer.next(); |
570 |
token = lexer.look(); |
571 |
String mode_specifier = "IN"; |
572 |
if( token.getType() == Token.IDENTIFIER ) {
|
573 |
switch(token.getLiteral().trim().toUpperCase()) {
|
574 |
case "IN": |
575 |
lexer.next(); |
576 |
mode_specifier = "IN";
|
577 |
break;
|
578 |
case "OUT": |
579 |
lexer.next(); |
580 |
mode_specifier = "OUT";
|
581 |
break;
|
582 |
case "INOUT": |
583 |
lexer.next(); |
584 |
mode_specifier = "INOUT";
|
585 |
break;
|
586 |
} |
587 |
} |
588 |
Code op = parse_termino(); |
589 |
return codeBuilder.$HostExpression(op, mode_specifier); |
590 |
} |
591 |
return parse_termino();
|
592 |
} |
593 |
|
594 |
@SuppressWarnings("UnusedAssignment") |
595 |
public Code parse_termino() {
|
596 |
|
597 |
Token token = lexer.look(); |
598 |
switch( token.getType() ) {
|
599 |
case Token.PARENTHESIS_OPEN: {
|
600 |
lexer.next(); |
601 |
Code value = parse_expression(); |
602 |
Token next = lexer.next(); |
603 |
switch(next.getType()) {
|
604 |
case Token.PARENTHESIS_CLOSE:
|
605 |
break;
|
606 |
case Token.EOF:
|
607 |
throw new ExpressionSyntaxException( |
608 |
I18N.Closing_parenthesis_was_expected_and_end_of_source_was_found(), |
609 |
lexer |
610 |
); |
611 |
default:
|
612 |
throw new ExpressionSyntaxException( |
613 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
614 |
lexer |
615 |
); |
616 |
} |
617 |
return value;
|
618 |
} |
619 |
case Token.IDENTIFIER: {
|
620 |
Code code = parse_grammars(); |
621 |
if( code!=null ) { |
622 |
return code;
|
623 |
} |
624 |
if( this.grammars.isReservedWord(token.getLiteral()) ) { |
625 |
return null; |
626 |
} |
627 |
lexer.next(); |
628 |
String id = (String) token.getLiteral(); |
629 |
Token next = lexer.look(); |
630 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
631 |
next = lexer.next(); |
632 |
Codes args = parse_arguments(); |
633 |
next = lexer.next(); |
634 |
switch(next.getType()) {
|
635 |
case Token.PARENTHESIS_CLOSE:
|
636 |
break;
|
637 |
case Token.EOF:
|
638 |
throw new ExpressionSyntaxException( |
639 |
I18N.Closing_parenthesis_was_expected_and_end_of_source_was_found(), |
640 |
lexer |
641 |
); |
642 |
default:
|
643 |
throw new ExpressionSyntaxException( |
644 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
645 |
lexer |
646 |
); |
647 |
} |
648 |
// Optimizacion para cuando se esta invocando a la funcion dict
|
649 |
if( StringUtils.equalsIgnoreCase(id, FUNCTION_DICT) && args!=null && args.size()==1 ) { |
650 |
code = args.get(0);
|
651 |
if( code.code()==Code.CALLABLE &&
|
652 |
StringUtils.equalsIgnoreCase(((Callable)code).name(),FUNCTION_DICT) ) {
|
653 |
return code;
|
654 |
} |
655 |
} |
656 |
return codeBuilder.function(id, args);
|
657 |
} else {
|
658 |
if( StringUtils.equalsIgnoreCase(id, "TRUE") ) { |
659 |
return codeBuilder.constant(true); |
660 |
} |
661 |
if( StringUtils.equalsIgnoreCase(id, "FALSE") ) { |
662 |
return codeBuilder.constant(false); |
663 |
} |
664 |
return codeBuilder.identifier(id);
|
665 |
} |
666 |
} |
667 |
case Token.STRING_LITERAL:
|
668 |
lexer.next(); |
669 |
return codeBuilder.constant(token.getValue());
|
670 |
case Token.INTEGER_LITERAL:
|
671 |
lexer.next(); |
672 |
return codeBuilder.constant(token.getValue());
|
673 |
case Token.FLOATING_POINT_LITERAL:
|
674 |
lexer.next(); |
675 |
return codeBuilder.constant(token.getValue());
|
676 |
case Token.NULL:
|
677 |
lexer.next(); |
678 |
return codeBuilder.constant(null); |
679 |
case Token.TRUE:
|
680 |
lexer.next(); |
681 |
return codeBuilder.constant(true); |
682 |
case Token.FALSE:
|
683 |
lexer.next(); |
684 |
return codeBuilder.constant(false); |
685 |
case Token.OP_SUBST:
|
686 |
lexer.next(); |
687 |
Code code = parse_termino(); |
688 |
if( code.code()==Code.CONSTANT ) {
|
689 |
BaseConstant c = (BaseConstant)code; |
690 |
if( c.value() instanceof Number ) { |
691 |
c.value(NegOperator.negate((Number) c.value()));
|
692 |
return code;
|
693 |
} |
694 |
throw new ExpressionSyntaxException(I18N.A_numeric_constant_was_expected_after_the_unary_operator_minus(),lexer); |
695 |
} |
696 |
return codeBuilder.negate(code);
|
697 |
case Token.EOF:
|
698 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
699 |
default:
|
700 |
return parse_grammars();
|
701 |
} |
702 |
} |
703 |
|
704 |
public Codes parse_expressions(String sep) { |
705 |
BaseCodes codes = null;
|
706 |
while( true ) { |
707 |
Code code = parse_expression(); |
708 |
if( code!=null ) { |
709 |
if( codes == null ) { |
710 |
codes = (BaseCodes) codeBuilder.args(); |
711 |
} |
712 |
codes.add(code); |
713 |
} |
714 |
Token next = lexer.look(); |
715 |
String literal = next.getLiteral();
|
716 |
if( literal == null ) { |
717 |
return codes;
|
718 |
} |
719 |
literal = literal.trim(); |
720 |
if( sep.equals(literal) ) {
|
721 |
lexer.next(); // Consume el ",".
|
722 |
} else {
|
723 |
return codes;
|
724 |
} |
725 |
} |
726 |
} |
727 |
|
728 |
private String getKeyArgument() { |
729 |
((AbstractLexicalAnalyzer)lexer).save_state(); |
730 |
Token next = lexer.look(); |
731 |
if( next.getType()==Token.IDENTIFIER ) {
|
732 |
String key = next.getLiteral();
|
733 |
lexer.next(); |
734 |
next = lexer.next(); |
735 |
if( next.is(":","=","=>") ) { |
736 |
((AbstractLexicalAnalyzer)lexer).drop_state(); |
737 |
return key;
|
738 |
} |
739 |
} |
740 |
((AbstractLexicalAnalyzer)lexer).restore_state(); |
741 |
return null; |
742 |
} |
743 |
|
744 |
public Codes parse_arguments() {
|
745 |
String sep = ","; |
746 |
BaseCodes codes = null;
|
747 |
Map<String,Code> kwargs = null; |
748 |
while( true ) { |
749 |
String key = getKeyArgument();
|
750 |
if( key == null ) { |
751 |
if( kwargs != null ) { |
752 |
throw new ExpressionSyntaxException(I18N.nonkeyword_arg_after_keyword_arg(),lexer); |
753 |
} |
754 |
Code code = parse_expression(); |
755 |
if( code!=null ) { |
756 |
if( codes == null ) { |
757 |
codes = (BaseCodes) codeBuilder.args(); |
758 |
} |
759 |
codes.add(code); |
760 |
} |
761 |
} else {
|
762 |
if( kwargs == null ) { |
763 |
kwargs = new HashMap<>(); |
764 |
} |
765 |
Code code = parse_expression(); |
766 |
kwargs.put(key, code); |
767 |
} |
768 |
Token next = lexer.look(); |
769 |
if( !next.is(sep) ) {
|
770 |
break;
|
771 |
} |
772 |
lexer.next(); // Consume el ",".
|
773 |
} |
774 |
if( kwargs!=null ) { |
775 |
if( codes == null ) { |
776 |
codes = (BaseCodes) codeBuilder.args(); |
777 |
} |
778 |
Code code = codeBuilder.dict(kwargs); |
779 |
codes.add(code); |
780 |
} |
781 |
return codes;
|
782 |
} |
783 |
|
784 |
private Code parse_grammars() {
|
785 |
StatementContext context = new DefaultStatementContext();
|
786 |
Code code; |
787 |
BaseCodes args = (BaseCodes) this.codeBuilder.args();
|
788 |
context.trace("compiler.parse_gramars");
|
789 |
Statement stmt = this.grammars.getApplicableStatement(context); |
790 |
while( stmt!=null ) { |
791 |
code = stmt.parse(context); |
792 |
args.add(code); |
793 |
stmt = this.grammars.getApplicableStatement(context);
|
794 |
} |
795 |
switch(args.size()) {
|
796 |
case 0 : |
797 |
code = null;
|
798 |
break;
|
799 |
case 1 : |
800 |
code = args.get(0);
|
801 |
break;
|
802 |
default:
|
803 |
code = this.codeBuilder.function(CodeBlockFunction.NAME, args);
|
804 |
break;
|
805 |
} |
806 |
return code;
|
807 |
} |
808 |
} |