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Glassfish example source code file (CoyoteReader.java)

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

Java - Glassfish tags/keywords

bufferedreader, clonenotsupportedexception, coyotereader, illegalstateexception, illegalstateexception, io, ioexception, ioexception, line_sep, line_sep, max_line_length, string, string, stringbuilder, stringmanager

The Glassfish CoyoteReader.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 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
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * 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
 * only if the new code is made subject to such option by the copyright
 * holder.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed 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.apache.catalina.connector;

import org.apache.catalina.util.StringManager;

import java.io.BufferedReader;
import java.io.IOException;


/**
 * Coyote implementation of the buffered reader.
 * 
 * @author Remy Maucherat
 */
public class CoyoteReader
    extends BufferedReader {


    // -------------------------------------------------------------- Constants


    private static final char[] LINE_SEP = { '\r', '\n' };
    private static final int MAX_LINE_LENGTH = 4096;

    /**
     * The string manager for this package.
     */
    private static final StringManager sm =
        StringManager.getManager(Constants.Package);


    // ----------------------------------------------------- Instance Variables


    protected InputBuffer ib;

    protected char[] lineBuffer = null;


    // ----------------------------------------------------------- Constructors


    public CoyoteReader(InputBuffer ib) {
        super(ib, 1);
        this.ib = ib;
    }

    // --------------------------------------------------------- Public Methods


    /**
    * Prevent cloning the facade.
    */
    protected Object clone()
        throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }
    
    
    // -------------------------------------------------------- Package Methods


    /**
     * Clear facade.
     */
    void clear() {
        ib = null;
    }


    // --------------------------------------------------------- Reader Methods


    public void close()
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        ib.close();
    }


    public int read()
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return ib.read();
    }


    public int read(char[] cbuf)
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return ib.read(cbuf, 0, cbuf.length);
    }


    public int read(char[] cbuf, int off, int len)
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return ib.read(cbuf, off, len);
    }


    public long skip(long n)
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return ib.skip(n);
    }


    public boolean ready()
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return ib.ready();
    }


    public boolean markSupported() {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        return true;
    }


    public void mark(int readAheadLimit)
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        ib.mark(readAheadLimit);
    }


    public void reset()
        throws IOException {
        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }
        ib.reset();
    }


    public String readLine()
        throws IOException {

        // Disallow operation if the object has gone out of scope
        if (ib == null) {
            throw new IllegalStateException(
                sm.getString("object.invalidScope"));
        }

        if (lineBuffer == null) {
            lineBuffer = new char[MAX_LINE_LENGTH];
        }

        String result = null;

        int pos = 0;
        int end = -1;
        int skip = -1;
        StringBuilder aggregator = null;
        while (end < 0) {
            mark(MAX_LINE_LENGTH);
            while ((pos < MAX_LINE_LENGTH) && (end < 0)) {
                int nRead = read(lineBuffer, pos, MAX_LINE_LENGTH - pos);
                if (nRead < 0) {
                    if (pos == 0 && aggregator == null) {
                        return null;
                    }
                    end = pos;
                    skip = pos;
                }
                for (int i = pos; (i < (pos + nRead)) && (end < 0); i++) {
                    if (lineBuffer[i] == LINE_SEP[0]) {
                        end = i;
                        skip = i + 1;
                        char nextchar;
                        if (i == (pos + nRead - 1)) {
                            nextchar = (char) read();
                        } else {
                            nextchar = lineBuffer[i+1];
                        }
                        if (nextchar == LINE_SEP[1]) {
                            skip++;
                        }
                    } else if (lineBuffer[i] == LINE_SEP[1]) {
                        end = i;
                        skip = i + 1;
                    }
                }
                if (nRead > 0) {
                    pos += nRead;
                }
            }
            if (end < 0) {
                if (aggregator == null) {
                    aggregator = new StringBuilder();
                }
                aggregator.append(lineBuffer);
                pos = 0;
            } else {
                reset();
                skip(skip);
            }
        }

        if (aggregator == null) {
            result = new String(lineBuffer, 0, end);
        } else {
            aggregator.append(lineBuffer, 0, end);
            result = aggregator.toString();
        }

        return result;

    }


}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish CoyoteReader.java source code file:

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