| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.functions; |
| |
| import java.io.BufferedInputStream; |
| import java.io.InputStream; |
| import java.util.Properties; |
| |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.objects.XNumber; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XString; |
| import org.apache.xpath.res.XPATHErrorResources; |
| |
| /** |
| * 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 |
| * org.apache.xalan.processor.TransformerFactoryImpl.XSLT_PROPERTIES |
| */ |
| static final String XSLT_PROPERTIES = |
| "org/apache/xalan/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 = System.getProperty(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 = System.getProperty(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 |
| SecuritySupport ss = SecuritySupport.getInstance(); |
| |
| InputStream is = ss.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 org.apache.xml.utils.WrappedRuntimeException(ex); |
| } |
| } |
| } |