org.apache.http.nio.util.SimpleInputBuffer Maven / Gradle / Ivy
Show all versions of httpcore-nio Show documentation
/*
* ====================================================================
* 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
* .
*
*/
package org.apache.http.nio.util;
import java.io.IOException;
import org.apache.http.nio.ContentDecoder;
/**
* Basic implementation of the {@link ContentInputBuffer} interface.
*
* This class is not thread safe.
*
* @since 4.0
*/
public class SimpleInputBuffer extends ExpandableBuffer implements ContentInputBuffer {
private boolean endOfStream = false;
public SimpleInputBuffer(final int buffersize, final ByteBufferAllocator allocator) {
super(buffersize, allocator);
}
/**
* @since 4.3
*/
public SimpleInputBuffer(final int buffersize) {
this(buffersize, HeapByteBufferAllocator.INSTANCE);
}
@Override
public void reset() {
this.endOfStream = false;
super.clear();
}
@Override
public int consumeContent(final ContentDecoder decoder) throws IOException {
setInputMode();
int totalRead = 0;
int bytesRead;
while ((bytesRead = decoder.read(this.buffer)) != -1) {
if (bytesRead == 0) {
if (!this.buffer.hasRemaining()) {
expand();
} else {
break;
}
} else {
totalRead += bytesRead;
}
}
if (bytesRead == -1 || decoder.isCompleted()) {
this.endOfStream = true;
}
return totalRead;
}
public boolean isEndOfStream() {
return !hasData() && this.endOfStream;
}
@Override
public int read() throws IOException {
if (isEndOfStream()) {
return -1;
}
setOutputMode();
return this.buffer.get() & 0xff;
}
@Override
public int read(final byte[] b, final int off, final int len) throws IOException {
if (isEndOfStream()) {
return -1;
}
if (b == null) {
return 0;
}
setOutputMode();
int chunk = len;
if (chunk > this.buffer.remaining()) {
chunk = this.buffer.remaining();
}
this.buffer.get(b, off, chunk);
return chunk;
}
public int read(final byte[] b) throws IOException {
if (isEndOfStream()) {
return -1;
}
if (b == null) {
return 0;
}
return read(b, 0, b.length);
}
public void shutdown() {
this.endOfStream = true;
}
}