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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
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* If you wish your version of this file to be governed by only the CDDL or
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* elects to include this software in this distribution under the [CDDL or GPL
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* recipient has the option to distribute your version of this file under
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* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package org.glassfish.grizzly.http;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.ThreadCache;
import org.glassfish.grizzly.memory.Buffers;
/**
* Object represents HTTP message content: complete or part.
* The HttpContent object could be used both with
* fixed-size and chunked HTTP messages.
* To get the HTTP message header - call {@link HttpContent#getHttpHeader()}.
*
* To build HttpContent message, use {@link Builder} object, which
* could be get following way: {@link HttpContent#builder(org.glassfish.grizzly.http.HttpHeader)}.
*
* @see HttpPacket
* @see HttpHeader
*
* @author Alexey Stashok
*/
public class HttpContent extends HttpPacket
implements org.glassfish.grizzly.Appendable {
private static final ThreadCache.CachedTypeIndex CACHE_IDX =
ThreadCache.obtainIndex(HttpContent.class, 16);
/**
* Returns true if passed {@link HttpPacket} is a HttpContent.
*
* @param httpPacket
* @return true if passed {@link HttpPacket} is a HttpContent.
*/
public static boolean isContent(final HttpPacket httpPacket) {
return httpPacket instanceof HttpContent;
}
/**
* Returns true if passed {@link HttpContent} is a BrokenHttpContent.
*
* @param httpContent
* @return true if passed {@link HttpContent} is a BrokenHttpContent.
*/
public static boolean isBroken(final HttpContent httpContent) {
return httpContent instanceof HttpBrokenContent;
}
public static HttpContent create() {
return create(null);
}
public static HttpContent create(final HttpHeader httpHeader) {
return create(httpHeader, false);
}
public static HttpContent create(final HttpHeader httpHeader,
final boolean isLast) {
return create(httpHeader, isLast, Buffers.EMPTY_BUFFER);
}
public static HttpContent create(final HttpHeader httpHeader,
final boolean isLast, Buffer content) {
content = content != null ? content : Buffers.EMPTY_BUFFER;
final HttpContent httpContent =
ThreadCache.takeFromCache(CACHE_IDX);
if (httpContent != null) {
httpContent.httpHeader = httpHeader;
httpContent.isLast = isLast;
httpContent.content = content;
return httpContent;
}
return new HttpContent(httpHeader, isLast, content);
}
/**
* Returns {@link HttpContent} builder.
*
* @param httpHeader related HTTP message header
* @return {@link Builder}.
*/
public static Builder builder(final HttpHeader httpHeader) {
return new Builder().httpHeader(httpHeader);
}
protected boolean isLast;
protected Buffer content = Buffers.EMPTY_BUFFER;
protected HttpHeader httpHeader;
protected HttpContent() {
this(null);
}
protected HttpContent(final HttpHeader httpHeader) {
this.httpHeader = httpHeader;
}
protected HttpContent(final HttpHeader httpHeader, final boolean isLast,
final Buffer content) {
this.httpHeader = httpHeader;
this.isLast = isLast;
this.content = content;
}
/**
* Get the HTTP message content {@link Buffer}.
*
* @return {@link Buffer}.
*/
public Buffer getContent() {
return content;
}
protected final void setContent(Buffer content) {
this.content = content;
}
/**
* Get the HTTP message header, associated with this content.
*
* @return {@link HttpHeader}.
*/
@Override
public final HttpHeader getHttpHeader() {
return httpHeader;
}
/**
* Return true, if the current content chunk is last,
* or false, if there are content chunks to follow.
*
* @return true, if the current content chunk is last,
* or false, if there are content chunks to follow.
*/
public boolean isLast() {
return isLast;
}
public void setLast(boolean isLast) {
this.isLast = isLast;
}
/**
* {@inheritDoc}
*/
@Override
public final boolean isHeader() {
return false;
}
@Override
public HttpContent append(final HttpContent element) {
if (isLast) {
throw new IllegalStateException("Can not append to a last chunk");
}
if (isBroken(element)) {
return element;
}
final Buffer content2 = element.getContent();
if (content2 != null && content2.hasRemaining()) {
content = Buffers.appendBuffers(null, content, content2);
}
if (element.isLast()) {
element.setContent(content);
return element;
}
return this;
}
/**
* Reset the internal state.
*/
protected void reset() {
isLast = false;
content = Buffers.EMPTY_BUFFER;
httpHeader = null;
}
/**
* {@inheritDoc}
*/
@Override
public void recycle() {
reset();
ThreadCache.putToCache(CACHE_IDX, this);
}
/**
* HttpContent message builder.
*/
public static class Builder {
protected boolean last;
protected Buffer content;
protected HttpHeader httpHeader;
protected Builder() {
}
/**
* Set the {@link HttpHeader} associated with this content.
*
* @param httpHeader the {@link HttpHeader} associated with this content.
*
* @return this.
*/
@SuppressWarnings({"unchecked"})
public final T httpHeader(final HttpHeader httpHeader) {
this.httpHeader = httpHeader;
return (T) this;
}
/**
* Set whether this HttpContent chunk is the last.
*
* @param last is this HttpContent chunk last.
* @return Builder
*/
@SuppressWarnings({"unchecked"})
public final T last(boolean last) {
this.last = last;
return (T) this;
}
/**
* Set the HttpContent chunk content {@link Buffer}.
*
* @param content the HttpContent chunk content {@link Buffer}.
* @return Builder
*/
@SuppressWarnings({"unchecked"})
public final T content(Buffer content) {
this.content = content;
return (T) this;
}
/**
* Build the HttpContent message.
*
* @return HttpContent
*/
public HttpContent build() {
if (httpHeader == null) {
throw new IllegalStateException("No HttpHeader specified to associate with this HttpContent.");
}
HttpContent httpContent = create();
httpContent.httpHeader = httpHeader;
httpContent.setLast(last);
if (content != null) {
httpContent.setContent(content);
}
return httpContent;
}
public void reset() {
last = false;
content = null;
httpHeader = null;
}
protected HttpContent create() {
return HttpContent.create();
}
}
}
