org.apache.abdera.util.AbderaSource Maven / Gradle / Ivy

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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  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.  For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.Reader;

import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;

import org.apache.abdera.model.Base;

/**
 * Provides a simple (and likely somewhat inefficient) implementation of 
 * javax.xml.transform.Source that allows Abdera objects to be used with
 * the javax.xml.transform API's
 */
public final class AbderaSource 
  extends StreamSource 
  implements Source {

  private final Base base;
  
  public AbderaSource(Base base) {
    this.base = base;
  }
  
  @Override
  public InputStream getInputStream() {
    try {
      PipedOutputStream pipeout = new PipedOutputStream();
      PipedInputStream pipein = new PipedInputStream(pipeout);
      base.writeTo(pipeout);
      pipeout.flush();
      pipeout.close();
      return pipein;
    } catch (IOException e) {
      return null;
    }
  }

  @Override
  public Reader getReader() {
    return new InputStreamReader(getInputStream());
  }

  @Override
  public void setInputStream(InputStream in) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setReader(Reader reader) {
    throw new UnsupportedOperationException();
  }

}