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.camel.converter.jaxb;
  
  import javax.xml.namespace.NamespaceContext;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamWriter;
  
  /**
   * {@link XMLStreamWriter} wrapper that filters out non-XML characters, see {@link NonXmlCharFilterer} for details.
   * Filtering applies to
   * <ul>
   * <li>Characters</li>
   * <li>CData</li>
   * <li>Attributes</li>
   * <li>Comments</li>
   * </ul>
   *
   * @see XMLStreamWriter
   */
  public class FilteringXmlStreamWriter implements XMLStreamWriter {
      NonXmlCharFilterer nonXmlCharFilterer = new NonXmlCharFilterer();
  
      private XMLStreamWriter writer;
      private String encoding;
  
      /**
       * @param writer target writer to wrap.
       */
      public FilteringXmlStreamWriter(XMLStreamWriter writer) {
          this.writer = writer;
      }
  
      /**
       * @param writer   target writer to wrap.
       * @param encoding the encoding to write in the xml prolog.
       *
       */
      public FilteringXmlStreamWriter(XMLStreamWriter writer, String encoding) {
          this.writer = writer;
          this.encoding = encoding;
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeAttribute(String prefix, String namespaceURI, String localName, String value)
              throws XMLStreamException {
          String filteredValue = nonXmlCharFilterer.filter(value);
          writer.writeAttribute(prefix, namespaceURI, localName, filteredValue);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeAttribute(String namespaceURI, String localName, String value)
              throws XMLStreamException {
          String filteredValue = nonXmlCharFilterer.filter(value);
          writer.writeAttribute(namespaceURI, localName, filteredValue);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeAttribute(String localName, String value) throws XMLStreamException {
          String filteredValue = nonXmlCharFilterer.filter(value);
          writer.writeAttribute(localName, filteredValue);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeCData(String data) throws XMLStreamException {
          String filteredData = nonXmlCharFilterer.filter(data);
          writer.writeCData(filteredData);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeCharacters(char[] text, int start, int len) throws XMLStreamException {
          nonXmlCharFilterer.filter(text, start, len);
          writer.writeCharacters(text, start, len);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeCharacters(String text) throws XMLStreamException {
          String filteredText = nonXmlCharFilterer.filter(text);
          writer.writeCharacters(filteredText);
      }
  
      /**
       * This method applies filtering before delegating call to {@link #writer}.
       */
      @Override
      public void writeComment(String data) throws XMLStreamException {
          String filteredData = nonXmlCharFilterer.filter(data);
          writer.writeComment(filteredData);
      }
  
      @Override
      public void close() throws XMLStreamException {
          writer.close();
      }
  
      @Override
      public void flush() throws XMLStreamException {
          writer.flush();
      }
  
      @Override
      public NamespaceContext getNamespaceContext() {
          return writer.getNamespaceContext();
      }
  
      @Override
      public String getPrefix(String uri) throws XMLStreamException {
          return writer.getPrefix(uri);
      }
  
      @Override
      public Object getProperty(String name) throws IllegalArgumentException {
          return writer.getProperty(name);
      }
  
      @Override
      public void setDefaultNamespace(String uri) throws XMLStreamException {
          writer.setDefaultNamespace(uri);
      }
  
      @Override
      public void setNamespaceContext(NamespaceContext context) throws XMLStreamException {
          writer.setNamespaceContext(context);
      }
  
      @Override
      public void setPrefix(String prefix, String uri) throws XMLStreamException {
          writer.setPrefix(prefix, uri);
      }
  
      @Override
      public void writeDefaultNamespace(String namespaceURI) throws XMLStreamException {
          writer.writeDefaultNamespace(namespaceURI);
      }
  
      @Override
      public void writeDTD(String dtd) throws XMLStreamException {
          writer.writeDTD(dtd);
      }
  
      @Override
      public void writeEmptyElement(String prefix, String localName, String namespaceURI)
              throws XMLStreamException {
          writer.writeEmptyElement(prefix, localName, namespaceURI);
      }
  
      @Override
      public void writeEmptyElement(String namespaceURI, String localName) throws XMLStreamException {
          writer.writeEmptyElement(namespaceURI, localName);
      }
  
      @Override
      public void writeEmptyElement(String localName) throws XMLStreamException {
          writer.writeEmptyElement(localName);
      }
  
      @Override
      public void writeEndDocument() throws XMLStreamException {
          writer.writeEndDocument();
      }
  
      @Override
      public void writeEndElement() throws XMLStreamException {
          writer.writeEndElement();
      }
  
      @Override
      public void writeEntityRef(String name) throws XMLStreamException {
          writer.writeEntityRef(name);
      }
  
      @Override
      public void writeNamespace(String prefix, String namespaceURI) throws XMLStreamException {
          writer.writeNamespace(prefix, namespaceURI);
      }
  
      @Override
      public void writeProcessingInstruction(String target, String data) throws XMLStreamException {
          writer.writeProcessingInstruction(target, data);
      }
  
      @Override
      public void writeProcessingInstruction(String target) throws XMLStreamException {
          writer.writeProcessingInstruction(target);
      }
  
      @Override
      public void writeStartDocument() throws XMLStreamException {
          if (encoding != null) {
              this.writeStartDocument(encoding, null);
          } else {
              writer.writeStartDocument();
          }
      }
  
      @Override
      public void writeStartDocument(String encoding, String version) throws XMLStreamException {
          writer.writeStartDocument(encoding, version);
      }
  
      @Override
      public void writeStartDocument(String version) throws XMLStreamException {
          if (encoding != null) {
              this.writeStartDocument(encoding, version);
          } else {
              writer.writeStartDocument(version);
          }
      }
  
      @Override
      public void writeStartElement(String prefix, String localName, String namespaceURI)
              throws XMLStreamException {
          writer.writeStartElement(prefix, localName, namespaceURI);
      }
  
      @Override
      public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
          writer.writeStartElement(namespaceURI, localName);
      }
  
      @Override
      public void writeStartElement(String localName) throws XMLStreamException {
          writer.writeStartElement(localName);
      }
  
  }
  