001: /*
002: * Copyright (c) 2001-2008 Caucho Technology, Inc. All rights reserved.
003: *
004: * The Apache Software License, Version 1.1
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution, if
019: * any, must include the following acknowlegement:
020: * "This product includes software developed by the
021: * Caucho Technology (http://www.caucho.com/)."
022: * Alternately, this acknowlegement may appear in the software itself,
023: * if and wherever such third-party acknowlegements normally appear.
024: *
025: * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
026: * endorse or promote products derived from this software without prior
027: * written permission. For written permission, please contact
028: * info@caucho.com.
029: *
030: * 5. Products derived from this software may not be called "Resin"
031: * nor may "Resin" appear in their names without prior written
032: * permission of Caucho Technology.
033: *
034: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
035: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
036: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
037: * DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
038: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
039: * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
040: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
041: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
042: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
043: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
044: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
045: *
046: * @author Scott Ferguson
047: */
048:
049: package com.caucho.hessian.io;
050:
051: import java.io.IOException;
052: import java.io.InputStream;
053:
054: /**
055: * Output stream for Hessian 2 streaming requests.
056: */
057: public class Hessian2StreamingInput {
058: private Hessian2Input _in;
059:
060: /**
061: * Creates a new Hessian input stream, initialized with an
062: * underlying input stream.
063: *
064: * @param is the underlying output stream.
065: */
066: public Hessian2StreamingInput(InputStream is) {
067: _in = new Hessian2Input(new StreamingInputStream(is));
068: }
069:
070: /**
071: * Read the next object
072: */
073: public Object readObject() throws IOException {
074: return _in.readStreamingObject();
075: }
076:
077: /**
078: * Close the output.
079: */
080: public void close() throws IOException {
081: _in.close();
082: }
083:
084: static class StreamingInputStream extends InputStream {
085: private InputStream _is;
086: private int _length;
087:
088: StreamingInputStream(InputStream is) {
089: _is = is;
090: }
091:
092: public int read() throws IOException {
093: InputStream is = _is;
094:
095: while (_length == 0) {
096: int code = is.read();
097:
098: if (code < 0)
099: return -1;
100: else if (code != 'p' && code != 'P')
101: throw new HessianProtocolException(
102: "expected streaming packet at 0x"
103: + Integer.toHexString(code & 0xff));
104:
105: int d1 = is.read();
106: int d2 = is.read();
107:
108: if (d2 < 0)
109: return -1;
110:
111: _length = (d1 << 8) + d2;
112: }
113:
114: _length--;
115: return is.read();
116: }
117:
118: public int read(byte[] buffer, int offset, int length)
119: throws IOException {
120: InputStream is = _is;
121:
122: while (_length == 0) {
123: int code = is.read();
124:
125: if (code < 0)
126: return -1;
127: else if (code != 'p' && code != 'P')
128: throw new HessianProtocolException(
129: "expected streaming packet at 0x"
130: + Integer.toHexString(code & 0xff));
131:
132: int d1 = is.read();
133: int d2 = is.read();
134:
135: if (d2 < 0)
136: return -1;
137:
138: _length = (d1 << 8) + d2;
139: }
140:
141: int sublen = _length;
142: if (length < sublen)
143: sublen = length;
144:
145: sublen = is.read(buffer, offset, sublen);
146:
147: if (sublen < 0)
148: return -1;
149:
150: _length -= sublen;
151:
152: return sublen;
153: }
154: }
155: }
|