/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.commons.cactus.client;

import java.io.*;
import java.net.*;
import java.security.*;

/**
 * Wrapper class for the real HttpURLConnection to the test servlet
 * that reads the complete input stream into an internal buffer on
 * the first call to getInputStream(). This is to ensure that the test servlet is not blocked on i/o
 * when the test caller asks for the results.
 * <p>
 * The wrapper returns the buffered input stream from getInputStream and
 * delegates the rest of the calls.
 * <p>
 * This class is final so we don't have to provide access to protected instance
 * variables and methods of the wrapped connection.
 *
 * @version @version@
 */
final class AutoReadHttpURLConnection extends HttpURLConnection {

    // Default size of array for copying data, not sure what a good size is
    static final int DEFAULT_CHUNK_SIZE = 16384;

    // Size of array for copying data,
    // Allow reset for testing copy loop
    int chunkSize = DEFAULT_CHUNK_SIZE;

    // The wrapped connection
    HttpURLConnection delegate;

    // The read input stream
    InputStream streamBuffer;

    AutoReadHttpURLConnection(HttpURLConnection conn) {
        super(null);
        delegate = conn;
    }

    /**
     * Returns an input stream containing the fully read contents of
     * the wrapped connection's input stream
     *
     * @return      the input stream
     */
    public synchronized InputStream getInputStream() throws IOException {
        if( streamBuffer == null ) {
            streamBuffer = bufferInputStream(delegate.getInputStream());
        }
        return streamBuffer;
    }

    InputStream bufferInputStream(InputStream is) throws IOException {
        ByteArrayOutputStream os = new ByteArrayOutputStream(chunkSize);
        copy(is, os);
        return new ByteArrayInputStream(os.toByteArray());        
    }

    void copy(InputStream is, OutputStream os) throws IOException {
        byte[] buf = new byte[chunkSize];
        int count;
        while( chunkSize == (count = is.read(buf)) ) {
            os.write(buf);
        }
        if( count > 0 ) {
            os.write(buf, 0, count);
        }
    }


    // Delegated methods

    public void connect() throws IOException {
        delegate.connect();
    }

    public boolean getAllowUserInteraction() {
        return delegate.getAllowUserInteraction();
    }

    public Object getContent() throws IOException {
        return delegate.getContent();
    }

    public String getContentEncoding() {
        return delegate.getContentEncoding();
    }

    public int getContentLength() {
        return delegate.getContentLength();
    }

    public String getContentType() {
        return delegate.getContentType();
    }

    public long getDate() {
        return delegate.getDate();
    }

    public boolean getDefaultUseCaches() {
      return delegate.getDefaultUseCaches();
    }

    public boolean getDoInput() {
        return delegate.getDoInput();
    }

    public boolean getDoOutput() {
        return delegate.getDoOutput();
    }

    public long getExpiration() {
        return delegate.getExpiration();
    }

    public String getHeaderField(int a0) {
        return delegate.getHeaderField(a0);
    }

    public String getHeaderField(String a0) {
        return delegate.getHeaderField(a0);
    }

    public long getHeaderFieldDate(String a0, long a1) {
        return delegate.getHeaderFieldDate(a0, a1);
    }

    public int getHeaderFieldInt(String a0, int a1) {
        return delegate.getHeaderFieldInt(a0, a1);
    }

    public String getHeaderFieldKey(int a0) {
        return delegate.getHeaderFieldKey(a0);
    }

    public long getIfModifiedSince() {
        return delegate.getIfModifiedSince();
    }

    public long getLastModified() {
        return delegate.getLastModified();
    }

    public OutputStream getOutputStream() throws IOException {
        return delegate.getOutputStream();
    }

    public Permission getPermission() throws IOException {
        return delegate.getPermission();
    }

    public String getRequestProperty(String a0) {
        return delegate.getRequestProperty(a0);
    }

    public URL getURL() {
        return delegate.getURL();
    }

    public boolean getUseCaches() {
        return delegate.getUseCaches();
    }

    public void setAllowUserInteraction(boolean a0) {
        delegate.setAllowUserInteraction(a0);
    }

    public void setDefaultUseCaches(boolean a0) {
        delegate.setDefaultUseCaches(a0);
    }

    public void setDoInput(boolean a0) {
        delegate.setDoInput(a0);
    }

    public void setDoOutput(boolean a0) {
        delegate.setDoOutput(a0);
    }

    public void setIfModifiedSince(long a0) {
        delegate.setIfModifiedSince(a0);
    }

    public void setRequestProperty(String a0, String a1) {
        delegate.setRequestProperty(a0, a1);
    }

    public void setUseCaches(boolean a0) {
        delegate.setUseCaches(a0);
    }

    public String toString() {
        return delegate.toString();
    }

    public void disconnect() {
        delegate.disconnect();
    }

    public InputStream getErrorStream() {
        return delegate.getErrorStream();
    }

    public String getRequestMethod() {
        return delegate.getRequestMethod();
    }

    public int getResponseCode() throws IOException {
        return delegate.getResponseCode();
    }

    public String getResponseMessage() throws IOException {
        return delegate.getResponseMessage();
    }

    public void setRequestMethod(String a0) throws ProtocolException {
        delegate.setRequestMethod(a0);
    }

    public boolean usingProxy() {
        return delegate.usingProxy();
    }

}