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 @ 44397
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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 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.CodeBuilder; |
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import org.gvsig.expressionevaluator.Codes; |
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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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|
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public class DefaultCompiler implements Compiler { |
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|
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class DefaultStatementContext implements StatementContext { |
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|
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private String codeClassifier; |
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private Map<String,Code> codes; |
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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.codes == null ) { |
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this.codes = new HashMap<>(); |
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} |
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if( !StringUtils.isBlank(this.codeClassifier) ) { |
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if( id.contains("#") ) { |
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id = StringUtils.replace(id,"#",this.codeClassifier,1); |
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} |
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} |
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this.codes.put(id, 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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return this.codes.get(id); |
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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.codeClassifier = classifier;
|
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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.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() {
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return DefaultCompiler.this.parse_expression();
|
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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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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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|
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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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//
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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() {
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this.grammars = new DefaultGrammarSet(); |
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this.lexer = new SQLLexicalAnalyzer(); |
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this.codeBuilder = new DefaultCodeBuilder(); |
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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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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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@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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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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Code code = parse_relational(); |
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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(); |
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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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} |
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break;
|
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case Token.ISNULL:
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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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case Token.OP_REGEXP:
|
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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_REGEXP_operator(),lexer); |
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} |
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op1 = codeBuilder.regexp(op1, op2); |
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break;
|
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case Token.PRED_LIKE:
|
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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_LIKE_operator(),lexer); |
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} |
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op1 = codeBuilder.like(op1, op2); |
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break;
|
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case Token.PRED_ILIKE:
|
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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_ILIKE_operator(),lexer); |
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} |
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op1 = codeBuilder.ilike(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_sum() {
|
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Code op1 = parse_factor(); |
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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_CONCAT:
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lexer.next(); |
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op2 = parse_factor(); |
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op1 = codeBuilder.concat(op1, op2); |
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break;
|
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case Token.OP_ADD:
|
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lexer.next(); |
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op2 = parse_factor(); |
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op1 = codeBuilder.add(op1, op2); |
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break;
|
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case Token.OP_SUBST:
|
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lexer.next(); |
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op2 = parse_factor(); |
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op1 = codeBuilder.subst(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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} |
376 |
|
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public Code parse_factor() {
|
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Code op1 = parse_getattr(); |
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Code op2; |
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while( true ) { |
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Token token = lexer.look(); |
382 |
switch( token.getType() ) {
|
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case Token.OP_MULT:
|
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lexer.next(); |
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op2 = parse_getattr(); |
386 |
if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_MULT_operator(),lexer); |
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} |
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op1 = codeBuilder.mult(op1, op2); |
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break;
|
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case Token.OP_DIV:
|
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lexer.next(); |
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op2 = parse_getattr(); |
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if( op2==null ) { |
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throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_DIV_operator(),lexer); |
396 |
} |
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op1 = codeBuilder.div(op1, op2); |
398 |
break;
|
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case Token.OP_MOD:
|
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lexer.next(); |
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op2 = parse_getattr(); |
402 |
if( op2==null ) { |
403 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_MOD_operator(),lexer); |
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} |
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op1 = codeBuilder.mod(op1, op2); |
406 |
break;
|
407 |
case Token.OPEN_BRACKET:
|
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lexer.next(); |
409 |
Code codeIndex = parse_expression(); |
410 |
if( codeIndex == null ) { |
411 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
412 |
} |
413 |
token = lexer.look(); |
414 |
if( token.getType()!=Token.CLOSED_BRACKET) {
|
415 |
throw new ExpressionSyntaxException(I18N.A_XTokenX_was_expected_and_XliteralX_was_found("]", token.getLiteral()),lexer); |
416 |
} |
417 |
lexer.next(); |
418 |
Code code = codeBuilder.getitem(op1, codeIndex); |
419 |
return code;
|
420 |
default:
|
421 |
return op1;
|
422 |
} |
423 |
} |
424 |
} |
425 |
|
426 |
public Code parse_getattr() {
|
427 |
Code op1 = parse_termino(); |
428 |
if( !isObjectAccessSupported() ) {
|
429 |
return op1;
|
430 |
} |
431 |
while( true ) { |
432 |
Token next = lexer.look(); |
433 |
switch( next.getType() ) {
|
434 |
case Token.OP_GETATTR:
|
435 |
lexer.next(); |
436 |
next = lexer.look(); |
437 |
if( next.getType()!=Token.IDENTIFIER ) {
|
438 |
throw new ExpressionSyntaxException( |
439 |
I18N.An_attribute_identifier_was_expected_and_XliteralX_was_found(next.getLiteral()), |
440 |
lexer |
441 |
); |
442 |
} |
443 |
String id = (String) next.getLiteral(); |
444 |
lexer.next(); |
445 |
next = lexer.look(); |
446 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
447 |
lexer.next(); |
448 |
Codes args = parse_expressions(",");
|
449 |
next = lexer.next(); |
450 |
if( next.getType() != Token.PARENTHESIS_CLOSE ) {
|
451 |
throw new ExpressionSyntaxException( |
452 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
453 |
lexer |
454 |
); |
455 |
} |
456 |
op1 = codeBuilder.method(op1, id, args); |
457 |
} else {
|
458 |
op1 = codeBuilder.getattr(op1, id); |
459 |
} |
460 |
break;
|
461 |
default:
|
462 |
return op1;
|
463 |
} |
464 |
} |
465 |
} |
466 |
|
467 |
public Code parse_termino() {
|
468 |
|
469 |
Token token = lexer.look(); |
470 |
switch( token.getType() ) {
|
471 |
case Token.PARENTHESIS_OPEN: {
|
472 |
lexer.next(); |
473 |
Code value = parse_expression(); |
474 |
Token next = lexer.next(); |
475 |
switch(next.getType()) {
|
476 |
case Token.PARENTHESIS_CLOSE:
|
477 |
break;
|
478 |
case Token.EOF:
|
479 |
throw new ExpressionSyntaxException( |
480 |
I18N.Closing_parenthesis_was_expected_and_end_of_source_was_found(), |
481 |
lexer |
482 |
); |
483 |
default:
|
484 |
throw new ExpressionSyntaxException( |
485 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
486 |
lexer |
487 |
); |
488 |
} |
489 |
return value;
|
490 |
} |
491 |
case Token.IDENTIFIER: {
|
492 |
Code code = parse_grammars(); |
493 |
if( code!=null ) { |
494 |
return code;
|
495 |
} |
496 |
if( this.grammars.isReservedWord(token.getLiteral()) ) { |
497 |
return null; |
498 |
} |
499 |
lexer.next(); |
500 |
String id = (String) token.getLiteral(); |
501 |
Token next = lexer.look(); |
502 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
503 |
lexer.next(); |
504 |
Codes args = parse_expressions(",");
|
505 |
next = lexer.next(); |
506 |
switch(next.getType()) {
|
507 |
case Token.PARENTHESIS_CLOSE:
|
508 |
break;
|
509 |
case Token.EOF:
|
510 |
throw new ExpressionSyntaxException( |
511 |
I18N.Closing_parenthesis_was_expected_and_end_of_source_was_found(), |
512 |
lexer |
513 |
); |
514 |
default:
|
515 |
throw new ExpressionSyntaxException( |
516 |
I18N.Closing_parenthesis_was_expected_and_XliteralX_was_found(next.getLiteral()), |
517 |
lexer |
518 |
); |
519 |
} |
520 |
return codeBuilder.function(id, args);
|
521 |
} else {
|
522 |
if( StringUtils.equalsIgnoreCase(id, "TRUE") ) { |
523 |
return codeBuilder.constant(true); |
524 |
} |
525 |
if( StringUtils.equalsIgnoreCase(id, "FALSE") ) { |
526 |
return codeBuilder.constant(false); |
527 |
} |
528 |
return codeBuilder.identifier(id);
|
529 |
} |
530 |
} |
531 |
case Token.STRING_LITERAL:
|
532 |
lexer.next(); |
533 |
return codeBuilder.constant(token.getValue());
|
534 |
case Token.INTEGER_LITERAL:
|
535 |
lexer.next(); |
536 |
return codeBuilder.constant(token.getValue());
|
537 |
case Token.FLOATING_POINT_LITERAL:
|
538 |
lexer.next(); |
539 |
return codeBuilder.constant(token.getValue());
|
540 |
case Token.NULL:
|
541 |
lexer.next(); |
542 |
return codeBuilder.constant(null); |
543 |
case Token.TRUE:
|
544 |
lexer.next(); |
545 |
return codeBuilder.constant(true); |
546 |
case Token.FALSE:
|
547 |
lexer.next(); |
548 |
return codeBuilder.constant(false); |
549 |
case Token.OP_SUBST:
|
550 |
lexer.next(); |
551 |
Code code = parse_termino(); |
552 |
if( code.code()==Code.CONSTANT ) {
|
553 |
BaseConstant c = (BaseConstant)code; |
554 |
if( c.value() instanceof Number ) { |
555 |
c.value(NegOperator.negate((Number) c.value()));
|
556 |
return code;
|
557 |
} |
558 |
throw new ExpressionSyntaxException(I18N.A_numeric_constant_was_expected_after_the_unary_operator_minus(),lexer); |
559 |
} |
560 |
return codeBuilder.negate(code);
|
561 |
case Token.EOF:
|
562 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
563 |
default:
|
564 |
return parse_grammars();
|
565 |
} |
566 |
} |
567 |
|
568 |
public Codes parse_expressions(String sep) { |
569 |
BaseCodes codes = null;
|
570 |
while( true ) { |
571 |
Code code = parse_expression(); |
572 |
if( code!=null ) { |
573 |
if( codes == null ) { |
574 |
codes = (BaseCodes) codeBuilder.args(); |
575 |
} |
576 |
codes.add(code); |
577 |
} |
578 |
Token next = lexer.look(); |
579 |
String literal = next.getLiteral();
|
580 |
if( literal == null ) { |
581 |
return codes;
|
582 |
} |
583 |
literal = literal.trim(); |
584 |
if( sep.equals(literal) ) {
|
585 |
lexer.next(); // Consume el ",".
|
586 |
} else {
|
587 |
return codes;
|
588 |
} |
589 |
} |
590 |
} |
591 |
|
592 |
private Code parse_grammars() {
|
593 |
StatementContext context = new DefaultStatementContext();
|
594 |
Code code; |
595 |
BaseCodes args = (BaseCodes) this.codeBuilder.args();
|
596 |
Statement stmt = this.grammars.getApplicableStatement(context); |
597 |
while( stmt!=null ) { |
598 |
code = stmt.parse(context); |
599 |
args.add(code); |
600 |
stmt = this.grammars.getApplicableStatement(context);
|
601 |
} |
602 |
switch(args.size()) {
|
603 |
case 0 : |
604 |
code = null;
|
605 |
break;
|
606 |
case 1 : |
607 |
code = args.get(0);
|
608 |
break;
|
609 |
default:
|
610 |
code = this.codeBuilder.function(CodeBlockFunction.NAME, args);
|
611 |
break;
|
612 |
} |
613 |
return code;
|
614 |
} |
615 |
} |