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1: /** 2: * ========================================= 3: * LibFormula : a free Java formula library 4: * ========================================= 5: * 6: * Project Info: http://reporting.pentaho.org/libformula/ 7: * 8: * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * 26: * ------------ 27: * $Id: URLEncodeFunction.java 3521 2007-10-16 10:55:14Z tmorgner $ 28: * ------------ 29: * (C) Copyright 2006-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.formula.function.text; 33: 34: import java.io.UnsupportedEncodingException; 35: 36: import org.jfree.formula.EvaluationException; 37: import org.jfree.formula.FormulaContext; 38: import org.jfree.formula.LibFormulaErrorValue; 39: import org.jfree.formula.function.Function; 40: import org.jfree.formula.function.ParameterCallback; 41: import org.jfree.formula.lvalues.TypeValuePair; 42: import org.jfree.formula.typing.Type; 43: import org.jfree.formula.typing.coretypes.TextType; 44: import org.jfree.formula.util.URLEncoder; 45: 46: /** 47: * This function encodes a given text using the URL-Encoding schema. An optional 48: * second parameter can be given to specify the character encoding that should 49: * be used when converting text to bytes. 50: * 51: * @author Cedric Pronzato 52: */ 53: public class URLEncodeFunction implements Function 54: { 55: public URLEncodeFunction() 56: { 57: } 58: 59: public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters) throws EvaluationException 60: { 61: final int parameterCount = parameters.getParameterCount(); 62: if (parameterCount < 1) 63: { 64: throw new EvaluationException(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE); 65: } 66: final Type textType = parameters.getType(0); 67: final Object textValue = parameters.getValue(0); 68: final String textResult = 69: context.getTypeRegistry().convertToText(textType, textValue); 70: 71: if(textResult == null) 72: { 73: throw new EvaluationException(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 74: } 75: 76: String encodingResult = null; 77: if(parameterCount == 2) 78: { 79: final Type encodingType = parameters.getType(1); 80: final Object encodingValue = parameters.getValue(1); 81: encodingResult = context.getTypeRegistry().convertToText(encodingType, encodingValue); 82: if(encodingResult == null) 83: { 84: throw new EvaluationException(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 85: } 86: } 87: try 88: { 89: if (encodingResult == null) 90: { 91: return new TypeValuePair 92: (TextType.TYPE, URLEncoder.encode(textResult, "ISO-8859-1")); 93: } 94: return new TypeValuePair 95: (TextType.TYPE, URLEncoder.encode(textResult, encodingResult)); 96: 97: } 98: catch(UnsupportedEncodingException use) 99: { 100: throw new EvaluationException(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 101: } 102: } 103: 104: public String getCanonicalName() 105: { 106: return "URLENCODE"; 107: } 108: 109: }