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/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.client.entity;
import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
import java.io.IOException;
import java.io.InputStream;
/**
* Lazy init InputStream wrapper.
*/
@NotThreadSafe
class LazyDecompressingInputStream extends InputStream {
private final InputStream wrappedStream;
private final DecompressingEntity decompressingEntity;
private InputStream wrapperStream;
public LazyDecompressingInputStream(
final InputStream wrappedStream,
final DecompressingEntity decompressingEntity) {
this.wrappedStream = wrappedStream;
this.decompressingEntity = decompressingEntity;
}
private void initWrapper() throws IOException {
if (wrapperStream == null) {
wrapperStream = decompressingEntity.decorate(wrappedStream);
}
}
@Override
public int read() throws IOException {
initWrapper();
return wrapperStream.read();
}
@Override
public int read(final byte[] b) throws IOException {
initWrapper();
return wrapperStream.read(b);
}
@Override
public int read(final byte[] b, final int off, final int len) throws IOException {
initWrapper();
return wrapperStream.read(b, off, len);
}
@Override
public long skip(final long n) throws IOException {
initWrapper();
return wrapperStream.skip(n);
}
@Override
public boolean markSupported() {
return false;
}
@Override
public int available() throws IOException {
initWrapper();
return wrapperStream.available();
}
@Override
public void close() throws IOException {
try {
if (wrapperStream != null) {
wrapperStream.close();
}
} finally {
wrappedStream.close();
}
}
}
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