Source Code Cross Referenced for WriterOutputStream.java in  » Ajax » dwr » org » directwebremoting » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » dwr » org.directwebremoting.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005 Joe Walker
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:        package org.directwebremoting.util;
017:
018:        import java.io.IOException;
019:        import java.io.Writer;
020:
021:        import javax.servlet.ServletOutputStream;
022:
023:        /**
024:         * This is not the evil hack you are looking for.
025:         * @author Joe Walker [joe at getahead dot ltd dot uk]
026:         */
027:        public final class WriterOutputStream extends ServletOutputStream {
028:            /**
029:             * ctor using platform default encoding
030:             * @param writer The stream that we proxy to
031:             */
032:            public WriterOutputStream(Writer writer) {
033:                this .writer = writer;
034:            }
035:
036:            /**
037:             * ctor that allows us to specify how strings are created
038:             * @param writer The stream that we proxy to
039:             * @param encoding The string encoding of data that we write to the stream
040:             */
041:            public WriterOutputStream(Writer writer, String encoding) {
042:                this .writer = writer;
043:                this .encoding = encoding;
044:            }
045:
046:            /* (non-Javadoc)
047:             * @see javax.servlet.ServletOutputStream#print(java.lang.String)
048:             */
049:            @Override
050:            public void print(String s) throws IOException {
051:                writer.write(s);
052:            }
053:
054:            /* (non-Javadoc)
055:             * @see java.io.OutputStream#write(byte[])
056:             */
057:            @Override
058:            public void write(byte[] ba) throws IOException {
059:                if (encoding == null) {
060:                    writer.write(new String(ba));
061:                } else {
062:                    writer.write(new String(ba, encoding));
063:                }
064:            }
065:
066:            /* (non-Javadoc)
067:             * @see java.io.OutputStream#write(byte[], int, int)
068:             */
069:            @Override
070:            public void write(byte[] ba, int off, int len) throws IOException {
071:                if (encoding == null) {
072:                    writer.write(new String(ba, off, len));
073:                } else {
074:                    writer.write(new String(ba, off, len, encoding));
075:                }
076:            }
077:
078:            /* (non-Javadoc)
079:             * @see java.io.OutputStream#write(int)
080:             */
081:            @Override
082:            public synchronized void write(int bite) throws IOException {
083:                buffer[0] = (byte) bite;
084:                write(buffer);
085:            }
086:
087:            /* (non-Javadoc)
088:             * @see java.io.OutputStream#close()
089:             */
090:            @Override
091:            public void close() throws IOException {
092:                if (writer != null) {
093:                    writer.close();
094:                    writer = null;
095:                    encoding = null;
096:                }
097:            }
098:
099:            /* (non-Javadoc)
100:             * @see java.io.OutputStream#flush()
101:             */
102:            @Override
103:            public void flush() throws IOException {
104:                writer.flush();
105:            }
106:
107:            /**
108:             * The destination of all our printing
109:             */
110:            private Writer writer;
111:
112:            /**
113:             * What string encoding should we use
114:             */
115:            private String encoding = null;
116:
117:            /**
118:             * Buffer for write(int)
119:             */
120:            private byte[] buffer = new byte[1];
121:        }
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