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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.util.internal.StringUtil;

import java.util.Map;

/**
 * The default {@link LastHttpContent} implementation.
 */
public class DefaultLastHttpContent extends DefaultHttpContent implements LastHttpContent {

    private final HttpHeaders trailingHeaders;
    private final boolean validateHeaders;

    public DefaultLastHttpContent() {
        this(Unpooled.buffer(0));
    }

    public DefaultLastHttpContent(ByteBuf content) {
        this(content, true);
    }

    public DefaultLastHttpContent(ByteBuf content, boolean validateHeaders) {
        super(content);
        trailingHeaders = new TrailingHeaders(validateHeaders);
        this.validateHeaders = validateHeaders;
    }

    @Override
    public LastHttpContent copy() {
        DefaultLastHttpContent copy = new DefaultLastHttpContent(content().copy(), validateHeaders);
        copy.trailingHeaders().set(trailingHeaders());
        return copy;
    }

    @Override
    public LastHttpContent duplicate() {
        DefaultLastHttpContent copy = new DefaultLastHttpContent(content().duplicate(), validateHeaders);
        copy.trailingHeaders().set(trailingHeaders());
        return copy;
    }

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

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

    @Override
    public HttpHeaders trailingHeaders() {
        return trailingHeaders;
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder(super.toString());
        buf.append(StringUtil.NEWLINE);
        appendHeaders(buf);

        // Remove the last newline.
        buf.setLength(buf.length() - StringUtil.NEWLINE.length());
        return buf.toString();
    }

    private void appendHeaders(StringBuilder buf) {
        for (Map.Entry e: trailingHeaders()) {
            buf.append(e.getKey());
            buf.append(": ");
            buf.append(e.getValue());
            buf.append(StringUtil.NEWLINE);
        }
    }

    private static final class TrailingHeaders extends DefaultHttpHeaders {
        TrailingHeaders(boolean validate) {
            super(validate);
        }

        @Override
        void validateHeaderName0(CharSequence name) {
            super.validateHeaderName0(name);
            if (HttpHeaders.equalsIgnoreCase(HttpHeaders.Names.CONTENT_LENGTH, name) ||
                    HttpHeaders.equalsIgnoreCase(HttpHeaders.Names.TRANSFER_ENCODING, name) ||
                    HttpHeaders.equalsIgnoreCase(HttpHeaders.Names.TRAILER, name)) {
                throw new IllegalArgumentException(
                        "prohibited trailing header: " + name);
            }
        }
    }
}