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 @ 44644
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package org.gvsig.expressionevaluator; |
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import java.io.File; |
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import org.apache.commons.lang3.ArrayUtils; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.ExpressionBuilder.Value; |
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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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//
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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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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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public static String surroundByDynamicTextTag(String source) { |
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return surroundByDynamicTextTag(source, true); |
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} |
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public static String surroundByDynamicTextTag(String source, boolean insert) { |
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if( source==null ) { |
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return null; |
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} |
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if( insert ) {
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return "<%=" + source + "%>"; |
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} |
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return "<%" + source + "%>"; |
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} |
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public static boolean isDynamicText(String source) { |
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String[] sources = StringUtils.substringsBetween(source, "<%", "%>"); |
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if( ArrayUtils.isEmpty(sources) ) {
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return false; |
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} |
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return true; |
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} |
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public static String evaluateDynamicText(String source) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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return manager.evaluateDynamicText(source);
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} |
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public static String evaluateDynamicText(SymbolTable symbolTable, String source) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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return manager.evaluateDynamicText(symbolTable, source);
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} |
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public static File evaluateFilename(File source) { |
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return evaluateFilename(null, source); |
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} |
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public static boolean isDynamicFilename(File source) { |
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if( source == null ) { |
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return false; |
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} |
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return isDynamicText(source.getPath());
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} |
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@SuppressWarnings("StringEquality") |
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public static File evaluateFilename(SymbolTable symbolTable, File source) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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String src = source.getPath();
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String r = manager.evaluateDynamicText(symbolTable, src);
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if( r == src ) { // !!! I compare that it is the same pointer, it is what I want. |
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return source;
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} |
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File f = new File(r); |
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return f;
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} |
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public static int parseInt(String s) throws NumberFormatException { |
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if( StringUtils.isBlank(s) ) {
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throw new NumberFormatException("Can't get integer from a blank string."); |
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} |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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SymbolTable symbolTable = null; //manager.getInmutableSymbolTable(); |
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Object x;
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try {
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x = manager.evaluate(symbolTable, s); |
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if( x instanceof Number ) { |
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return ((Number) x).intValue(); |
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} |
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} catch(Exception ex) { |
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NumberFormatException ex1 = new NumberFormatException("Can't get integer from '"+s+"'."); |
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ex1.initCause(ex); |
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throw ex;
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} |
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if( x == null ) { |
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throw new NumberFormatException("Can't get integer from '"+s+"' value is null."); |
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} |
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throw new NumberFormatException("Can't get integer from '"+s+"' value is a "+x.getClass().getSimpleName()+"."); |
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} |
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public static long parseLong(String s) throws NumberFormatException { |
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if( StringUtils.isBlank(s) ) {
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throw new NumberFormatException("Can't get long from a blank string."); |
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} |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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SymbolTable symbolTable = null; //manager.getInmutableSymbolTable(); |
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Object x;
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try {
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x = manager.evaluate(symbolTable, s); |
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if( x instanceof Number ) { |
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return ((Number) x).longValue(); |
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} |
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} catch(Exception ex) { |
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NumberFormatException ex1 = new NumberFormatException("Can't get long from '"+s+"'."); |
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ex1.initCause(ex); |
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throw ex;
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} |
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if( x == null ) { |
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throw new NumberFormatException("Can't get long from '"+s+"' value is null."); |
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} |
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throw new NumberFormatException("Can't get long from '"+s+"' value is a "+x.getClass().getSimpleName()+"."); |
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} |
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public static double parseDouble(String s) throws NumberFormatException { |
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if( StringUtils.isBlank(s) ) {
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throw new NumberFormatException("Can't get double from a blank string."); |
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} |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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SymbolTable symbolTable = null; //manager.getInmutableSymbolTable(); |
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Object x;
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try {
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x = manager.evaluate(symbolTable, s); |
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if( x instanceof Number ) { |
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return ((Number) x).doubleValue(); |
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} |
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} catch(Exception ex) { |
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NumberFormatException ex1 = new NumberFormatException("Can't get double from '"+s+"'."); |
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ex1.initCause(ex); |
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throw ex;
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} |
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if( x == null ) { |
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throw new NumberFormatException("Can't get double from '"+s+"' value is null."); |
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} |
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throw new NumberFormatException("Can't get double from '"+s+"' value is a "+x.getClass().getSimpleName()+"."); |
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} |
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public static Compiler createCompiler() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Compiler compiler = manager.createCompiler();
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return compiler;
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} |
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public static Interpreter createInterpreter() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Interpreter interpreter = manager.createInterpreter(); |
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return interpreter;
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} |
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public static Optimizer createOptimizer() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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Optimizer optimizer = manager.createOptimizer(); |
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return optimizer;
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} |
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public static String repr(Object value) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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ReprMethod method = manager.getReprMethod(value); |
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return method.repr(value);
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} |
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} |