content: /**
   * 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.activemq.filter;
  
  import org.apache.activemq.command.Message;
  import org.apache.activemq.util.ByteArrayInputStream;
  import org.w3c.dom.Document;
  import org.xml.sax.InputSource;
  
  import jakarta.jms.BytesMessage;
  import jakarta.jms.JMSException;
  import jakarta.jms.TextMessage;
  import javax.xml.parsers.DocumentBuilder;
  import javax.xml.xpath.XPath;
  import javax.xml.xpath.XPathConstants;
  import javax.xml.xpath.XPathFactory;
  import java.io.StringReader;
  
  public class JAXPXPathEvaluator implements XPathExpression.XPathEvaluator {
  
      private static final XPathFactory FACTORY = XPathFactory.newInstance();
      private final String xpathExpression;
      private final DocumentBuilder builder;
      private final XPath xpath = FACTORY.newXPath();
  
      public JAXPXPathEvaluator(String xpathExpression, DocumentBuilder builder) throws Exception {
          this.xpathExpression = xpathExpression;
          if (builder != null) {
              this.builder = builder;
          } else {
              throw new RuntimeException("No document builder available");
          }
      }
  
      public boolean evaluate(Message message) throws JMSException {
          if (message instanceof TextMessage) {
              String text = ((TextMessage)message).getText();
              return evaluate(text);
          } else if (message instanceof BytesMessage) {
              BytesMessage bm = (BytesMessage)message;
              byte data[] = new byte[(int)bm.getBodyLength()];
              bm.readBytes(data);
              return evaluate(data);
          }
          return false;
      }
  
      private boolean evaluate(byte[] data) {
          try {
              InputSource inputSource = new InputSource(new ByteArrayInputStream(data));
              Document inputDocument = builder.parse(inputSource);
              return (Boolean) xpath.evaluate(xpathExpression, inputDocument, XPathConstants.BOOLEAN);
          } catch (Exception e) {
              return false;
          }
      }
  
      private boolean evaluate(String text) {
          try {
              InputSource inputSource = new InputSource(new StringReader(text));
              Document inputDocument = builder.parse(inputSource);
              return (Boolean) xpath.evaluate(xpathExpression, inputDocument, XPathConstants.BOOLEAN);
          } catch (Exception e) {
              return false;
          }
      }
  
      @Override
      public String toString() {
          return xpathExpression;
      }
  }
  