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Java example source code file (ContinuationWebSocketFrame.java)

This example Java source code file (ContinuationWebSocketFrame.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bytebuf, continuationwebsocketframe, override, string

The ContinuationWebSocketFrame.java Java example source code

/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.
 */
package io.netty.handler.codec.http.websocketx;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.util.CharsetUtil;

/**
 * Web Socket continuation frame containing continuation text or binary data. This is used for
 * fragmented messages where the contents of a messages is contained more than 1 frame.
 */
public class ContinuationWebSocketFrame extends WebSocketFrame {

    /**
     * Creates a new empty continuation frame.
     */
    public ContinuationWebSocketFrame() {
        this(Unpooled.buffer(0));
    }

    /**
     * Creates a new continuation frame with the specified binary data. The final fragment flag is
     * set to true.
     *
     * @param binaryData the content of the frame.
     */
    public ContinuationWebSocketFrame(ByteBuf binaryData) {
        super(binaryData);
    }

    /**
     * Creates a new continuation frame with the specified binary data
     *
     * @param finalFragment
     *            flag indicating if this frame is the final fragment
     * @param rsv
     *            reserved bits used for protocol extensions
     * @param binaryData
     *            the content of the frame.
     */
    public ContinuationWebSocketFrame(boolean finalFragment, int rsv, ByteBuf binaryData) {
        super(finalFragment, rsv, binaryData);
    }

    /**
     * Creates a new continuation frame with the specified text data
     *
     * @param finalFragment
     *            flag indicating if this frame is the final fragment
     * @param rsv
     *            reserved bits used for protocol extensions
     * @param text
     *            text content of the frame.
     */
    public ContinuationWebSocketFrame(boolean finalFragment, int rsv, String text) {
        this(finalFragment, rsv, fromText(text));
    }

    /**
     * Returns the text data in this frame
     */
    public String text() {
        return content().toString(CharsetUtil.UTF_8);
    }

    /**
     * Sets the string for this frame
     *
     * @param text
     *            text to store
     */
    private static ByteBuf fromText(String text) {
        if (text == null || text.isEmpty()) {
            return Unpooled.EMPTY_BUFFER;
        } else {
            return Unpooled.copiedBuffer(text, CharsetUtil.UTF_8);
        }
    }

    @Override
    public ContinuationWebSocketFrame copy() {
        return (ContinuationWebSocketFrame) super.copy();
    }

    @Override
    public ContinuationWebSocketFrame duplicate() {
        return (ContinuationWebSocketFrame) super.duplicate();
    }

    @Override
    public ContinuationWebSocketFrame retainedDuplicate() {
        return (ContinuationWebSocketFrame) super.retainedDuplicate();
    }

    @Override
    public ContinuationWebSocketFrame replace(ByteBuf content) {
        return new ContinuationWebSocketFrame(isFinalFragment(), rsv(), content);
    }

    @Override
    public ContinuationWebSocketFrame retain() {
        super.retain();
        return this;
    }

    @Override
    public ContinuationWebSocketFrame retain(int increment) {
        super.retain(increment);
        return this;
    }

    @Override
    public ContinuationWebSocketFrame touch() {
        super.touch();
        return this;
    }

    @Override
    public ContinuationWebSocketFrame touch(Object hint) {
        super.touch(hint);
        return this;
    }
}

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