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 / grammars / BasicGrammarFactory.java @ 44262
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package org.gvsig.expressionevaluator.impl.grammars; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_CAST; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_REGEXP; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.Grammar; |
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import org.gvsig.expressionevaluator.Statement; |
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import org.gvsig.expressionevaluator.impl.function.operator.RegExpOperator; |
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import org.gvsig.expressionevaluator.impl.function.programming.IIFFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.LetFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.CaseFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.CodeBlockFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.CreateFnFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.ForEachFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.ReturnFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.TryFunction; |
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import org.gvsig.expressionevaluator.impl.function.programming.WhileFunction; |
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import org.gvsig.expressionevaluator.spi.AbstractGrammarFactory; |
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/**
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*
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* @author jjdelcerro
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*/
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public class BasicGrammarFactory extends AbstractGrammarFactory { |
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private Grammar grammar;
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public BasicGrammarFactory() {
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super("Basic", true); |
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} |
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@Override
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public Grammar createGrammar() {
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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if( this.grammar==null ) { |
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Grammar theGrammar = manager.createGrammar(this.getName());
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Statement stmt;
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theGrammar.addReservedWord("BEGIN");
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theGrammar.addReservedWord("END");
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theGrammar.addReservedWord("IF");
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theGrammar.addReservedWord("THEN");
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theGrammar.addReservedWord("ELSE");
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theGrammar.addReservedWord("WHILE");
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theGrammar.addReservedWord("CASE");
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theGrammar.addReservedWord("WHEN");
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theGrammar.addReservedWord("DEF");
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theGrammar.addReservedWord("MATCH");
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theGrammar.addReservedWord("CAST");
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theGrammar.addReservedWord("TRY");
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theGrammar.addReservedWord("EXCEPT");
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stmt = theGrammar.createStatement("LET");
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stmt.addRule(stmt.require_any_token("LET", "SET")); |
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stmt.addRule(stmt.require_identifier("NAME"));
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stmt.addRule(stmt.require_any_token("="));
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stmt.addRule(stmt.require_expression("VALUE"));
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stmt.code( |
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LetFunction.NAME, |
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stmt.args_names("NAME", "VALUE") |
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); |
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theGrammar.addStatement(stmt); |
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/*
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BEGIN
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SET x = 0;
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FOR n in FETCH GEOMETRY FROM STORE 'view','points':
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IF ST_Intersects(n,GEOMETRY) THEN
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SET x = x+1
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EXCEPT
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SET x = -1
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END WITH VALUE x
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*/
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stmt = theGrammar.createStatement("BLOCK");
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stmt.addRule(stmt.require_any_token("BEGIN"));
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stmt.addRule(stmt.require_expressions("VALUES", ";")); |
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// stmt.addRule(stmt.optional_any_token("EXCEPT")
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// .addRuleOnTrue(stmt.require_expression("EXCEPT"))
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// );
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stmt.addRule(stmt.require_any_token("END"));
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// stmt.addRule(stmt.optional_any_token("WITH")
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// .addRuleOnTrue(stmt.require_any_token("VALUE"))
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// .addRuleOnTrue(stmt.require_expression("VALUE"))
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// );
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stmt.code( |
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CodeBlockFunction.NAME, |
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// stmt.args_names("EXCEPT","VALUE"),
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stmt.args_expand("VALUES")
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("IF");
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stmt.addRule(stmt.require_any_token("IF"));
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stmt.addRule(stmt.require_expression("CONDITION"));
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stmt.addRule(stmt.optional_any_token("THEN"));
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("ONTRUE"));
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stmt.addRule(stmt.optional_any_token("ELSE")
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.addRuleOnTrue(stmt.optional_any_token(":"))
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.addRuleOnTrue(stmt.require_expression("ONFALSE"))
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); |
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stmt.code( |
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IIFFunction.NAME, |
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stmt.args_names("CONDITION","ONTRUE","ONFALSE") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("WHILE");
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stmt.addRule(stmt.require_any_token("WHILE"));
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stmt.addRule(stmt.require_expression("CONDITION"));
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stmt.addRule(stmt.optional_any_token("DO"));
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("BODY"));
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stmt.addRule(stmt.optional_any_token("DONE"));
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stmt.code( |
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WhileFunction.NAME, |
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stmt.args_names("CONDITION","BODY") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("CAST");
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stmt.addRule(stmt.require_any_token("CAST"));
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stmt.addRule(stmt.optional_any_token("(")
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.addRuleOnTrue(stmt.require_expression("VALUE"))
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.addRuleOnTrue(stmt.require_any_token("AS"))
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.addRuleOnTrue(stmt.require_identifier("TYPE"))
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.addRuleOnTrue(stmt.require_any_token(")"))
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.addRuleOnFalse(stmt.require_expression("VALUE"))
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.addRuleOnFalse(stmt.require_any_token("AS"))
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.addRuleOnFalse(stmt.require_identifier("TYPE"))
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); |
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stmt.code( |
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FUNCTION_CAST, |
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stmt.args_names("VALUE","TYPE") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("MATCH");
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stmt.addRule(stmt.require_any_token("MATCH"));
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stmt.addRule(stmt.optional_any_token("(")
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.addRuleOnTrue(stmt.require_expression("VALUE"))
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.addRuleOnTrue(stmt.require_any_token(","))
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.addRuleOnTrue(stmt.require_expression("PATTERN"))
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.addRuleOnTrue(stmt.require_any_token(")"))
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.addRuleOnFalse(stmt.require_expression("VALUE"))
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.addRuleOnFalse(stmt.optional_any_token(","))
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.addRuleOnFalse(stmt.require_expression("PATTERN"))
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); |
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stmt.code( |
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OPERATOR_REGEXP, |
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stmt.args_names("VALUE","PATTERN") |
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); |
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theGrammar.addStatement(stmt); |
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// stmt = theGrammar.createStatement("FOR");
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// stmt.addRule(stmt.require_token("FOR"));
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// stmt.addRule(stmt.require_expression("INIT"));
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// stmt.addRule(stmt.require_token(";"));
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// stmt.addRule(stmt.require_expression("CONDITION"));
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// stmt.addRule(stmt.require_token(";"));
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// stmt.addRule(stmt.require_expression("STEP"));
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// stmt.addRule(stmt.optional_token(":"));
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// stmt.addRule(stmt.require_expression("BODY"));
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// stmt.addRule(stmt.optional_token("END"));
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// stmt.code(ForFunction.NAME,"INIT","CONDITION","STEP","BODY");
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// theGrammar.addStatement(stmt);
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stmt = theGrammar.createStatement("FOREACH");
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stmt.addRule(stmt.require_any_token("FOR"));
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stmt.addRule(stmt.require_identifier("VAR"));
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stmt.addRule(stmt.require_any_token("IN"));
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stmt.addRule(stmt.require_expression("ITERABLE"));
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("BODY"));
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stmt.code( |
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ForEachFunction.NAME, |
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stmt.args_names("VAR","ITERABLE","BODY") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("CASE");
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stmt.addRule(stmt.require_any_token("CASE"));
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stmt.addRule( |
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stmt.repeat_until_any_tokens("END","ELSE") |
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.addRule(stmt.require_any_token("WHEN"))
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.addRule(stmt.require_expression("CONDITION#"))
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.addRule(stmt.optional_any_token("THEN"))
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.addRule(stmt.optional_any_token(":"))
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.addRule(stmt.require_expression("ONTRUE#"))
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); |
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stmt.addRule(stmt.optional_any_token("ELSE")
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.addRuleOnTrue(stmt.optional_any_token(":"))
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.addRuleOnTrue(stmt.require_expression("ELSE"))
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); |
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stmt.addRule(stmt.optional_any_token("END"));
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stmt.code( |
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CaseFunction.NAME, |
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stmt.args_names("CONDITION#","ONTRUE#","ELSE") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("USERFUNCTION");
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stmt.addRule(stmt.require_any_token("DEF"));
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stmt.addRule(stmt.require_identifier("FUNCTION_NAME"));
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stmt.addRule(stmt.require_any_token("("));
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stmt.addRule(stmt.optional_identifiers("PARAM_NAMES", ",")); |
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stmt.addRule(stmt.require_any_token(")"));
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("BODY"));
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stmt.code( |
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CreateFnFunction.NAME, |
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stmt.args_names("FUNCTION_NAME","PARAM_NAMES","BODY") |
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("RETURN");
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stmt.addRule(stmt.require_any_token("RETURN"));
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stmt.addRule(stmt.require_expressions("VALUES", ",")); |
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stmt.code( |
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ReturnFunction.NAME, |
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stmt.args_expand("VALUES")
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("TRY");
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stmt.addRule(stmt.require_any_token("TRY"));
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("VALUE"));
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stmt.addRule(stmt.require_any_token("EXCEPT","CATH")); |
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stmt.addRule(stmt.optional_any_token(":"));
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stmt.addRule(stmt.require_expression("ONERROR"));
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stmt.code( |
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TryFunction.NAME, |
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stmt.args_names("VALUE","ONERROR") |
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); |
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theGrammar.addStatement(stmt); |
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// stmt = theGrammar.createStatement("FETCHFIRST");
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// stmt.addRule(stmt.require_token("FETCH"));
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// stmt.addRule(stmt.require_token("FIRST"));
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// stmt.addRule(stmt.require_expression("VALUE"));
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// stmt.addRule(stmt.optional_token("FROM"));
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// stmt.addRule(stmt.require_expression("FROM"));
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// stmt.addRule(stmt.optional_token("WHERE").addRuleOnTrue(stmt.require_expression("WHERE")));
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// stmt.addRule(stmt.optional_token("ORDER","BY").addRuleOnTrue(stmt.require_expression("ORDER")));
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// stmt.code("FETCH_FIRST","VALUE","FROM","WHERE");
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// theGrammar.addStatement(stmt);
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this.grammar = theGrammar;
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} |
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return grammar;
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} |
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} |