/*
    * 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.myfaces.tobago.internal.webapp;
  
  import org.apache.myfaces.tobago.internal.util.HtmlWriterHelper;
  import org.apache.myfaces.tobago.internal.util.WriterHelper;
  
  import javax.faces.context.ResponseWriter;
  import java.io.IOException;
  import java.io.Writer;
  import java.nio.charset.Charset;
  import java.util.Arrays;
  
  public final class XmlResponseWriter extends TobagoResponseWriterBase {
  
    private final WriterHelper helper;
  
    /**
     * @deprecated since 4.3.0
     */
    @Deprecated
    public XmlResponseWriter(
        final Writer writer, final String contentType, final String characterEncoding) {
      this(writer, contentType, Charset.forName(characterEncoding));
    }
  
    public XmlResponseWriter(
        final Writer writer, final String contentType, final Charset charset) {
      super(writer, contentType, charset);
      this.helper = new HtmlWriterHelper(writer, charset);
    }
  
    @Override
    public void writeText(final Object text, final String property)
        throws IOException {
      closeOpenTag();
      final String value = findValue(text, property);
      helper.writeText(value);
    }
  
    @Override
    public void writeText(final char[] text, final int offset, final int length)
        throws IOException {
      closeOpenTag();
      helper.writeText(text, offset, length);
    }
  
    @Override
    public void write(final char[] cbuf, final int off, final int len) throws IOException {
      // Related to http://java.net/jira/browse/JAVASERVERFACES_SPEC_PUBLIC-696
      if (Arrays.equals(cbuf, XML_VERSION_1_0_ENCODING_UTF_8_CHARS)) {
        // drop
      } else {
        super.write(cbuf, off, len);
      }
    }
  
    @Override
    protected void closeEmptyTag() throws IOException {
      getWriter().write("/>");
    }
  
    @Override
    protected void writerAttributeValue(final String value, final boolean escape) throws IOException {
      if (escape) {
        helper.writeAttributeValue(value);
      } else {
        getWriter().write(value);
      }
    }
  
    @Override
    public ResponseWriter cloneWithWriter(final Writer originalWriter) {
      return new XmlResponseWriter(originalWriter, getContentType(), Charset.forName(getCharacterEncoding()));
    }
  
    @Override
    public void startDocument() throws IOException {
    }
  
    @Override
    public void endDocument() throws IOException {
   }
 }