/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * Copyright 1999-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * $Id: FuncSystemProperty.java,v 1.2.4.2 2005/09/14 20:18:45 jeffsuttor Exp $ */ package com.sun.org.apache.xpath.internal.functions; import java.io.BufferedInputStream; import java.io.InputStream; import java.util.Properties; import com.sun.org.apache.xpath.internal.XPathContext; import com.sun.org.apache.xpath.internal.objects.XNumber; import com.sun.org.apache.xpath.internal.objects.XObject; import com.sun.org.apache.xpath.internal.objects.XString; import com.sun.org.apache.xpath.internal.res.XPATHErrorResources; import com.sun.org.apache.xalan.internal.utils.ObjectFactory; import com.sun.org.apache.xalan.internal.utils.SecuritySupport; /** * Execute the SystemProperty() function. * @xsl.usage advanced */ public class FuncSystemProperty extends FunctionOneArg { static final long serialVersionUID = 3694874980992204867L; /** * The path/filename of the property file: XSLTInfo.properties * Maintenance note: see also * com.sun.org.apache.xalan.internal.processor.TransformerFactoryImpl.XSLT_PROPERTIES */ static final String XSLT_PROPERTIES = "com/sun/org/apache/xalan/internal/res/XSLTInfo.properties"; /** * Execute the function. The function must return * a valid object. * @param xctxt The current execution context. * @return A valid XObject. * * @throws javax.xml.transform.TransformerException */ public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException { String fullName = m_arg0.execute(xctxt).str(); int indexOfNSSep = fullName.indexOf(':'); String result; String propName = ""; // List of properties where the name of the // property argument is to be looked for. Properties xsltInfo = new Properties(); loadPropertyFile(XSLT_PROPERTIES, xsltInfo); if (indexOfNSSep > 0) { String prefix = (indexOfNSSep >= 0) ? fullName.substring(0, indexOfNSSep) : ""; String namespace; namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix); propName = (indexOfNSSep < 0) ? fullName : fullName.substring(indexOfNSSep + 1); if (namespace.startsWith("http://www.w3.org/XSL/Transform") || namespace.equals("http://www.w3.org/1999/XSL/Transform")) { result = xsltInfo.getProperty(propName); if (null == result) { warn(xctxt, XPATHErrorResources.WG_PROPERTY_NOT_SUPPORTED, new Object[]{ fullName }); //"XSL Property not supported: "+fullName); return XString.EMPTYSTRING; } } else { warn(xctxt, XPATHErrorResources.WG_DONT_DO_ANYTHING_WITH_NS, new Object[]{ namespace, fullName }); //"Don't currently do anything with namespace "+namespace+" in property: "+fullName); try { result = SecuritySupport.getSystemProperty(propName); if (null == result) { // result = System.getenv(propName); return XString.EMPTYSTRING; } } catch (SecurityException se) { warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION, new Object[]{ fullName }); //"SecurityException when trying to access XSL system property: "+fullName); return XString.EMPTYSTRING; } } } else { try { result = SecuritySupport.getSystemProperty(fullName); if (null == result) { // result = System.getenv(fullName); return XString.EMPTYSTRING; } } catch (SecurityException se) { warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION, new Object[]{ fullName }); //"SecurityException when trying to access XSL system property: "+fullName); return XString.EMPTYSTRING; } } if (propName.equals("version") && result.length() > 0) { try { // Needs to return the version number of the spec we conform to. return new XString("1.0"); } catch (Exception ex) { return new XString(result); } } else return new XString(result); } /** * Retrieve a propery bundle from a specified file * * @param file The string name of the property file. The name * should already be fully qualified as path/filename * @param target The target property bag the file will be placed into. */ public void loadPropertyFile(String file, Properties target) { try { // Use SecuritySupport class to provide priveleged access to property file InputStream is = SecuritySupport.getResourceAsStream(ObjectFactory.findClassLoader(), file); // get a buffered version BufferedInputStream bis = new BufferedInputStream(is); target.load(bis); // and load up the property bag from this bis.close(); // close out after reading } catch (Exception ex) { // ex.printStackTrace(); throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(ex); } } }