svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.api / src / main / java / org / gvsig / expressionevaluator / ExpressionUtils.java @ 44346
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package org.gvsig.expressionevaluator; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.ExpressionBuilder.Value; |
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import org.gvsig.tools.script.Script; |
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/**
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*
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* @author jjdelcerro
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*/
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public class ExpressionUtils { |
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public static boolean isEmpty(Expression expression) { |
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return expression == null || expression.isEmpty(); |
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} |
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public static boolean isPhraseEmpty(Expression expression) { |
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return expression == null || expression.isPhraseEmpty(); |
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} |
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public static Expression defaultIfEmpty(Expression expression, Expression defaultValue) { |
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if( expression==null || expression.isEmpty() ) { |
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return defaultValue;
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} |
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return expression;
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} |
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public static Expression defaultNullIfEmpty(Expression expression) { |
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if( expression==null || expression.isEmpty() ) { |
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return null; |
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} |
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return expression;
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} |
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public static Expression defaultIfPhraseEmpty(Expression expression, Expression defaultValue) { |
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if( expression==null || expression.isPhraseEmpty() ) { |
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return defaultValue;
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} |
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return expression;
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} |
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public static Expression defaultNullIfPhraseEmpty(Expression expression) { |
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if( expression==null || expression.isPhraseEmpty() ) { |
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return null; |
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} |
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return expression;
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} |
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public static Expression createExpression() { |
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Expression expression = ExpressionEvaluatorLocator.getManager().createExpression();
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return expression;
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} |
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public static Expression createExpression(String phrase) { |
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if( StringUtils.isBlank(phrase) ) {
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return null; |
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} |
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Expression expression = ExpressionEvaluatorLocator.getManager().createExpression();
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expression.setPhrase(phrase); |
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return expression;
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} |
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public static Expression createExpression(String phrase, String code, Script... scripts) { |
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Expression expression = ExpressionEvaluatorLocator.getManager().createExpression();
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expression.setPhrase(phrase); |
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expression.setUserScript(code); |
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for (Script script : scripts) {
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expression.addScript(script); |
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} |
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return expression;
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} |
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public static Expression createExpression(String phrase, String code, String languaje, Script... scripts) { |
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Expression expression = ExpressionEvaluatorLocator.getManager().createExpression();
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expression.setPhrase(phrase); |
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expression.setUserScript(code, languaje); |
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for (Script script : scripts) {
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expression.addScript(script); |
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} |
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return expression;
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} |
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public static ExpressionBuilder createExpressionBuilder() { |
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ExpressionBuilder builder = ExpressionEvaluatorLocator.getManager().createExpressionBuilder(); |
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return builder;
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} |
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public static Code compile(String expression) { |
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if( StringUtils.isBlank(expression) ) {
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return null; |
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} |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Code code = manager.compile(expression); |
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return code;
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} |
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public static Object evaluate(String expression) { |
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return evaluate(null, expression); |
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} |
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public static Object evaluate(SymbolTable symbolTable, String expression) { |
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if( StringUtils.isBlank(expression) ) {
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return null; |
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} |
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if( symbolTable==null ) { |
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symbolTable = createSymbolTable(); |
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} |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Object x = manager.evaluate(symbolTable, expression);
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return x;
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} |
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public static Object evaluate(SymbolTable symbolTable, Code code) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Object x = manager.evaluate(symbolTable, code);
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return x;
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} |
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public static Code optimize(SymbolTable symbolTable, Code code) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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code = manager.optimize(symbolTable, code); |
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return code;
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} |
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public static String toString(Value value, Formatter formatter) { |
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if( value == null ) { |
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return null; |
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} |
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if( formatter==null ) { |
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formatter = ExpressionBuilder.EMPTY_FORMATTER; |
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} |
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return value.toString(formatter);
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} |
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public static String toString(Value value) { |
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if( value == null ) { |
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return null; |
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} |
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return value.toString(ExpressionBuilder.EMPTY_FORMATTER);
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} |
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public static String toString(Code code, Formatter formatter) { |
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if( code == null ) { |
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return null; |
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} |
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if( formatter==null ) { |
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formatter = Code.EMPTY_FORMATTER; |
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} |
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return code.toString(formatter);
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} |
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public static String toString(Code code) { |
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if( code == null ) { |
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return null; |
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} |
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return code.toString(Code.EMPTY_FORMATTER);
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} |
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public static Expression createExpressionFromJSON(String json) { |
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Expression expression = ExpressionUtils.createExpression();
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expression.fromJSON(json); |
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return expression;
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} |
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public static MutableSymbolTable createSymbolTable() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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MutableSymbolTable symbolTable = manager.createSymbolTable(); |
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return symbolTable;
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} |
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} |