| /* |
| * 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. |
| */ |
| package org.apache.tomcat.util.descriptor.tld; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.AccessController; |
| |
| import org.apache.juli.logging.Log; |
| import org.apache.juli.logging.LogFactory; |
| import org.apache.tomcat.util.descriptor.Constants; |
| import org.apache.tomcat.util.descriptor.DigesterFactory; |
| import org.apache.tomcat.util.descriptor.XmlErrorHandler; |
| import org.apache.tomcat.util.digester.Digester; |
| import org.apache.tomcat.util.digester.RuleSet; |
| import org.apache.tomcat.util.security.PrivilegedGetTccl; |
| import org.apache.tomcat.util.security.PrivilegedSetTccl; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Parses a Tag Library Descriptor. |
| */ |
| public class TldParser { |
| private final Log log = LogFactory.getLog(TldParser.class); // must not be static |
| private final Digester digester; |
| |
| public TldParser(boolean namespaceAware, boolean validation, |
| boolean blockExternal) { |
| this(namespaceAware, validation, new TldRuleSet(), blockExternal); |
| } |
| |
| public TldParser(boolean namespaceAware, boolean validation, RuleSet ruleSet, |
| boolean blockExternal) { |
| digester = DigesterFactory.newDigester( |
| validation, namespaceAware, ruleSet, blockExternal); |
| } |
| |
| public TaglibXml parse(TldResourcePath path) throws IOException, SAXException { |
| ClassLoader original; |
| if (Constants.IS_SECURITY_ENABLED) { |
| PrivilegedGetTccl pa = new PrivilegedGetTccl(); |
| original = AccessController.doPrivileged(pa); |
| } else { |
| original = Thread.currentThread().getContextClassLoader(); |
| } |
| try (InputStream is = path.openStream()) { |
| if (Constants.IS_SECURITY_ENABLED) { |
| PrivilegedSetTccl pa = new PrivilegedSetTccl(TldParser.class.getClassLoader()); |
| AccessController.doPrivileged(pa); |
| } else { |
| Thread.currentThread().setContextClassLoader(TldParser.class.getClassLoader()); |
| } |
| XmlErrorHandler handler = new XmlErrorHandler(); |
| digester.setErrorHandler(handler); |
| |
| TaglibXml taglibXml = new TaglibXml(); |
| digester.push(taglibXml); |
| |
| InputSource source = new InputSource(path.toExternalForm()); |
| source.setByteStream(is); |
| digester.parse(source); |
| if (!handler.getWarnings().isEmpty() || !handler.getErrors().isEmpty()) { |
| handler.logFindings(log, source.getSystemId()); |
| if (!handler.getErrors().isEmpty()) { |
| // throw the first to indicate there was a error during processing |
| throw handler.getErrors().iterator().next(); |
| } |
| } |
| return taglibXml; |
| } finally { |
| digester.reset(); |
| if (Constants.IS_SECURITY_ENABLED) { |
| PrivilegedSetTccl pa = new PrivilegedSetTccl(original); |
| AccessController.doPrivileged(pa); |
| } else { |
| Thread.currentThread().setContextClassLoader(original); |
| } |
| } |
| } |
| |
| public void setClassLoader(ClassLoader classLoader) { |
| digester.setClassLoader(classLoader); |
| } |
| } |