001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: FuncFormatNumb.java 468643 2006-10-28 06:56:03Z minchau $
020 */
021 package org.apache.xalan.templates;
022
023 import javax.xml.transform.ErrorListener;
024 import javax.xml.transform.TransformerException;
025
026 import org.apache.xalan.res.XSLMessages;
027 import org.apache.xalan.res.XSLTErrorResources;
028 import org.apache.xml.utils.QName;
029 import org.apache.xml.utils.SAXSourceLocator;
030 import org.apache.xpath.Expression;
031 import org.apache.xpath.XPathContext;
032 import org.apache.xpath.functions.Function3Args;
033 import org.apache.xpath.functions.WrongNumberArgsException;
034 import org.apache.xpath.objects.XObject;
035 import org.apache.xpath.objects.XString;
036
037 /**
038 * Execute the FormatNumber() function.
039 * @xsl.usage advanced
040 */
041 public class FuncFormatNumb extends Function3Args
042 {
043 static final long serialVersionUID = -8869935264870858636L;
044
045 /**
046 * Execute the function. The function must return
047 * a valid object.
048 * @param xctxt The current execution context.
049 * @return A valid XObject.
050 *
051 * @throws javax.xml.transform.TransformerException
052 */
053 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
054 {
055
056 // A bit of an ugly hack to get our context.
057 ElemTemplateElement templElem =
058 (ElemTemplateElement) xctxt.getNamespaceContext();
059 StylesheetRoot ss = templElem.getStylesheetRoot();
060 java.text.DecimalFormat formatter = null;
061 java.text.DecimalFormatSymbols dfs = null;
062 double num = getArg0().execute(xctxt).num();
063 String patternStr = getArg1().execute(xctxt).str();
064
065 // TODO: what should be the behavior here??
066 if (patternStr.indexOf(0x00A4) > 0)
067 ss.error(XSLTErrorResources.ER_CURRENCY_SIGN_ILLEGAL); // currency sign not allowed
068
069 // this third argument is not a locale name. It is the name of a
070 // decimal-format declared in the stylesheet!(xsl:decimal-format
071 try
072 {
073 Expression arg2Expr = getArg2();
074
075 if (null != arg2Expr)
076 {
077 String dfName = arg2Expr.execute(xctxt).str();
078 QName qname = new QName(dfName, xctxt.getNamespaceContext());
079
080 dfs = ss.getDecimalFormatComposed(qname);
081
082 if (null == dfs)
083 {
084 warn(xctxt, XSLTErrorResources.WG_NO_DECIMALFORMAT_DECLARATION,
085 new Object[]{ dfName }); //"not found!!!
086
087 //formatter = new java.text.DecimalFormat(patternStr);
088 }
089 else
090 {
091
092 //formatter = new java.text.DecimalFormat(patternStr, dfs);
093 formatter = new java.text.DecimalFormat();
094
095 formatter.setDecimalFormatSymbols(dfs);
096 formatter.applyLocalizedPattern(patternStr);
097 }
098 }
099
100 //else
101 if (null == formatter)
102 {
103
104 // look for a possible default decimal-format
105 dfs = ss.getDecimalFormatComposed(new QName(""));
106
107 if (dfs != null)
108 {
109 formatter = new java.text.DecimalFormat();
110
111 formatter.setDecimalFormatSymbols(dfs);
112 formatter.applyLocalizedPattern(patternStr);
113 }
114 else
115 {
116 dfs = new java.text.DecimalFormatSymbols(java.util.Locale.US);
117
118 dfs.setInfinity(Constants.ATTRVAL_INFINITY);
119 dfs.setNaN(Constants.ATTRVAL_NAN);
120
121 formatter = new java.text.DecimalFormat();
122
123 formatter.setDecimalFormatSymbols(dfs);
124
125 if (null != patternStr)
126 formatter.applyLocalizedPattern(patternStr);
127 }
128 }
129
130 return new XString(formatter.format(num));
131 }
132 catch (Exception iae)
133 {
134 templElem.error(XSLTErrorResources.ER_MALFORMED_FORMAT_STRING,
135 new Object[]{ patternStr });
136
137 return XString.EMPTYSTRING;
138
139 //throw new XSLProcessorException(iae);
140 }
141 }
142
143 /**
144 * Warn the user of a problem.
145 *
146 * @param xctxt The XPath runtime state.
147 * @param msg Warning message key
148 * @param args Arguments to be used in warning message
149 * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
150 * the error condition is severe enough to halt processing.
151 *
152 * @throws javax.xml.transform.TransformerException
153 */
154 public void warn(XPathContext xctxt, String msg, Object args[])
155 throws javax.xml.transform.TransformerException
156 {
157
158 String formattedMsg = XSLMessages.createWarning(msg, args);
159 ErrorListener errHandler = xctxt.getErrorListener();
160
161 errHandler.warning(new TransformerException(formattedMsg,
162 (SAXSourceLocator)xctxt.getSAXLocator()));
163 }
164
165 /**
166 * Overide the superclass method to allow one or two arguments.
167 *
168 *
169 * @param argNum Number of arguments passed in
170 *
171 * @throws WrongNumberArgsException
172 */
173 public void checkNumberArgs(int argNum) throws WrongNumberArgsException
174 {
175 if ((argNum > 3) || (argNum < 2))
176 reportWrongNumberArgs();
177 }
178
179 /**
180 * Constructs and throws a WrongNumberArgException with the appropriate
181 * message for this function object.
182 *
183 * @throws WrongNumberArgsException
184 */
185 protected void reportWrongNumberArgs() throws WrongNumberArgsException {
186 throw new WrongNumberArgsException(XSLMessages.createMessage(XSLTErrorResources.ER_TWO_OR_THREE, null)); //"2 or 3");
187 }
188 }