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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.impl.io;
import java.io.IOException;
import java.io.InputStream;
import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
import ch.boye.httpclientandroidlib.io.BufferInfo;
import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
import ch.boye.httpclientandroidlib.util.Args;
/**
* Input stream that reads data without any transformation. The end of the
* content entity is demarcated by closing the underlying connection
* (EOF condition). Entities transferred using this input stream can be of
* unlimited length.
* <p>
* Note that this class NEVER closes the underlying stream, even when close
* gets called. Instead, it will read until the end of the stream (until
* <code>-1</code> is returned).
*
* @since 4.0
*/
@NotThreadSafe
public class IdentityInputStream extends InputStream {
private final SessionInputBuffer in;
private boolean closed = false;
/**
* Wraps session input stream and reads input until the the end of stream.
*
* @param in The session input buffer
*/
public IdentityInputStream(final SessionInputBuffer in) {
super();
this.in = Args.notNull(in, "Session input buffer");
}
@Override
public int available() throws IOException {
if (this.in instanceof BufferInfo) {
return ((BufferInfo) this.in).length();
} else {
return 0;
}
}
@Override
public void close() throws IOException {
this.closed = true;
}
@Override
public int read() throws IOException {
if (this.closed) {
return -1;
} else {
return this.in.read();
}
}
@Override
public int read(final byte[] b, final int off, final int len) throws IOException {
if (this.closed) {
return -1;
} else {
return this.in.read(b, off, len);
}
}
}
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