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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