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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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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 org.jboss.netty.handler.codec.http.multipart;

import org.jboss.netty.handler.codec.http.HttpConstants;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.regex.Pattern;

/**
 * Abstract HttpData implementation
 */
public abstract class AbstractHttpData implements HttpData {

    private static final Pattern STRIP_PATTERN = Pattern.compile("(?:^\\s+|\\s+$|\\n)");
    private static final Pattern REPLACE_PATTERN = Pattern.compile("[\\r\\t]");

    protected final String name;
    protected long definedSize;
    protected long size;
    protected Charset charset = HttpConstants.DEFAULT_CHARSET;
    protected boolean completed;
    protected long maxSize = DefaultHttpDataFactory.MAXSIZE;

    protected AbstractHttpData(String name, Charset charset, long size) {
        if (name == null) {
            throw new NullPointerException("name");
        }

        name = REPLACE_PATTERN.matcher(name).replaceAll(" ");
        name = STRIP_PATTERN.matcher(name).replaceAll("");

        if (name.length() == 0) {
            throw new IllegalArgumentException("empty name");
        }

        this.name = name;
        if (charset != null) {
            setCharset(charset);
        }
        definedSize = size;
    }

    public void setMaxSize(long maxSize) {
        this.maxSize = maxSize;
    }

    public void checkSize(long newSize) throws IOException {
        if (maxSize >= 0 && newSize > maxSize) {
            throw new IOException("Size exceed allowed maximum capacity");
        }
    }

    public String getName() {
        return name;
    }

    public boolean isCompleted() {
        return completed;
    }

    public Charset getCharset() {
        return charset;
    }

    public void setCharset(Charset charset) {
        if (charset == null) {
            throw new NullPointerException("charset");
        }
        this.charset = charset;
    }

    public long length() {
        return size;
    }
}