org.apache.xmlgraphics.image.codec.util.ImageInputStreamSeekableStreamAdapter Maven / Gradle / Ivy
/*
* 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.
*/
/* $Id: ImageInputStreamSeekableStreamAdapter.java 1683736 2015-06-05 12:18:54Z ssteiner $ */
package org.apache.xmlgraphics.image.codec.util;
import java.io.IOException;
import javax.imageio.stream.ImageInputStream;
/**
* A subclass of SeekableStream that may be used to wrap
* a regular ImageInputStream.
*/
public class ImageInputStreamSeekableStreamAdapter extends SeekableStream {
/** The source stream. */
private ImageInputStream stream;
/**
* Constructs a SeekableStream that takes
* its source data from a regular ImageInputStream.
* @param stream the underlying ImageInputStream to use
*/
public ImageInputStreamSeekableStreamAdapter(ImageInputStream stream)
throws IOException {
this.stream = stream;
}
/** {@inheritDoc} */
public boolean canSeekBackwards() {
return true;
}
/** {@inheritDoc} */
public long getFilePointer() throws IOException {
return stream.getStreamPosition();
}
/** {@inheritDoc} */
public void seek(long pos) throws IOException {
stream.seek(pos);
}
/** {@inheritDoc} */
public int read() throws IOException {
return stream.read();
}
/** {@inheritDoc} */
public int read(byte[] b, int off, int len) throws IOException {
return stream.read(b, off, len);
}
/** {@inheritDoc} */
public void close() throws IOException {
super.close();
stream.close();
}
}