Source Code Cross Referenced for ServletHttpPresentationInputStream.java in  » J2EE » Enhydra-Application-Framework » com » lutris » appserver » server » httpPresentation » servlet » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » Enhydra Application Framework » com.lutris.appserver.server.httpPresentation.servlet 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Enhydra Java Application Server Project
003:         * 
004:         * The contents of this file are subject to the Enhydra Public License
005:         * Version 1.1 (the "License"); you may not use this file except in
006:         * compliance with the License. You may obtain a copy of the License on
007:         * the Enhydra web site ( http://www.enhydra.org/ ).
008:         * 
009:         * Software distributed under the License is distributed on an "AS IS"
010:         * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 
011:         * the License for the specific terms governing rights and limitations
012:         * under the License.
013:         * 
014:         * The Initial Developer of the Enhydra Application Server is Lutris
015:         * Technologies, Inc. The Enhydra Application Server and portions created
016:         * by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
017:         * All Rights Reserved.
018:         * 
019:         * Contributor(s):
020:         * 
021:         * $Id: ServletHttpPresentationInputStream.java,v 1.2 2006-06-15 13:44:07 sinisa Exp $
022:         */
023:
024:        package com.lutris.appserver.server.httpPresentation.servlet;
025:
026:        import java.io.IOException;
027:
028:        import javax.servlet.ServletInputStream;
029:
030:        import com.lutris.appserver.server.httpPresentation.HttpPresentationIOException;
031:        import com.lutris.appserver.server.httpPresentation.HttpPresentationInputStream;
032:
033:        /**
034:         * HTTP request input stream reader for servlets.
035:         * This implements all methods that are defined in InputStream as calles
036:         * to the servlet object, since we don't know which ones are implemented by
037:         * ServletInputStream.
038:         *
039:         * @see javax.servlet.ServletInputStream
040:         */
041:        public class ServletHttpPresentationInputStream extends
042:                HttpPresentationInputStream {
043:            private ServletInputStream inputStream;
044:
045:            /**
046:             * Construct an object for accessing a servlet input stream.
047:             */
048:            protected ServletHttpPresentationInputStream(
049:                    ServletInputStream inputStream) {
050:                this .inputStream = inputStream;
051:            }
052:
053:            /**
054:             * Starting at the specified offset, reads into the given array of
055:             * bytes until all requested bytes have been read or a '\n' is
056:             * encountered, in which case the '\n' is read into the array as well.
057:             * @param b the buffer into which the data is read
058:             * @param off the start offset of the data
059:             * @param len the maximum number of bytes to read
060:             * @return the actual number of bytes read, or -1 if the end of the
061:             *         stream is reached
062:             * @exception IOException if an I/O error has occurred
063:             */
064:            public int readLine(byte[] b, int off, int len) throws IOException {
065:                try {
066:                    return inputStream.readLine(b, off, len);
067:                } catch (IOException except) {
068:                    throw new HttpPresentationIOException(except);
069:                }
070:            }
071:
072:            /*
073:             * InputStream methods vectored off to the ServletInputStream.
074:             */
075:            public int read() throws IOException {
076:                try {
077:                    return inputStream.read();
078:                } catch (IOException except) {
079:                    throw new HttpPresentationIOException(except);
080:                }
081:            }
082:
083:            public int read(byte b[]) throws IOException {
084:                try {
085:                    return inputStream.read(b);
086:                } catch (IOException except) {
087:                    throw new HttpPresentationIOException(except);
088:                }
089:            }
090:
091:            public int read(byte b[], int off, int len) throws IOException {
092:                try {
093:                    return inputStream.read(b, off, len);
094:                } catch (IOException except) {
095:                    throw new HttpPresentationIOException(except);
096:                }
097:            }
098:
099:            public long skip(long n) throws IOException {
100:                try {
101:                    return inputStream.skip(n);
102:                } catch (IOException except) {
103:                    throw new HttpPresentationIOException(except);
104:                }
105:            }
106:
107:            public int available() throws IOException {
108:                try {
109:                    return inputStream.available();
110:                } catch (IOException except) {
111:                    throw new HttpPresentationIOException(except);
112:                }
113:            }
114:
115:            public synchronized void mark(int readlimit) {
116:                inputStream.mark(readlimit);
117:            }
118:
119:            public synchronized void reset() throws IOException {
120:                try {
121:                    inputStream.reset();
122:                } catch (IOException except) {
123:                    throw new HttpPresentationIOException(except);
124:                }
125:            }
126:
127:            public boolean markSupported() {
128:                return inputStream.markSupported();
129:            }
130:        }
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