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 / DefaultGrammar.java @ 46901
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package org.gvsig.expressionevaluator.impl; |
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import org.gvsig.expressionevaluator.Grammar; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Set; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Statement; |
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import org.gvsig.expressionevaluator.Statement.StatementContext; |
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/**
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*
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* @author jjdelcerro
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*/
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public class DefaultGrammar implements Grammar { |
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private final String name; |
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private final List<Statement> statements; |
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private final Set<String> reservedWords; |
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public DefaultGrammar(String name) { |
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this.name = name;
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this.statements = new ArrayList<>(); |
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this.reservedWords = new HashSet<>(); |
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} |
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@Override
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public String getName() { |
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return this.name; |
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} |
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@Override
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public List<Statement> getStatements() { |
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return Collections.unmodifiableList(this.statements); |
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} |
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@Override
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public Statement createStatement(String name) { |
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DefaultStatement stmt = new DefaultStatement(name);
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return stmt;
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} |
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@Override
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public void addStatement(Statement statement) { |
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this.statements.add(statement);
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} |
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@Override
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public Statement getApplicableStatement(StatementContext context) { |
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context.trace(this.getName()+".getApplicableStatement"); |
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for (Statement statement : statements) { |
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if( statement.isApplicable(context) ) {
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context.trace(this.getName()+".getApplicableStatement return "+statement); |
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return statement;
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} |
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} |
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return null; |
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} |
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@Override
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public String toString() { |
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return this.getName(); |
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} |
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@Override
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public void addReservedWord(String id) { |
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if( StringUtils.isBlank(id) ) {
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return;
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} |
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this.reservedWords.add(id.toUpperCase());
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} |
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@Override
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public boolean isReservedWord(String id) { |
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if( StringUtils.isBlank(id) ) {
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return false; |
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} |
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return this.reservedWords.contains(id.toUpperCase()); |
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} |
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@Override
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public Iterator<Statement> iterator() { |
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return this.statements.iterator(); |
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} |
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} |