001: /* ====================================================================
002: * The LateralNZ Software License, Version 1.0
003: *
004: * Copyright (c) 2003 LateralNZ. All rights reserved.
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,
019: * if any, must include the following acknowledgment:
020: * "This product includes software developed by
021: * LateralNZ (http://www.lateralnz.org/) and other third parties."
022: * Alternately, this acknowledgment may appear in the software itself,
023: * if and wherever such third-party acknowledgments normally appear.
024: *
025: * 4. The names "LateralNZ" must not be used to endorse or promote
026: * products derived from this software without prior written
027: * permission. For written permission, please
028: * contact oss@lateralnz.org.
029: *
030: * 5. Products derived from this software may not be called "Panther",
031: * or "Lateral" or "LateralNZ", nor may "PANTHER" or "LATERAL" or
032: * "LATERALNZ" appear in their name, without prior written
033: * permission of LateralNZ.
034: *
035: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: *
049: * This software consists of voluntary contributions made by many
050: * individuals on behalf of LateralNZ. For more
051: * information on Lateral, please see http://www.lateralnz.com/ or
052: * http://www.lateralnz.org
053: *
054: */
055: package org.lateralnz.common.util;
056:
057: import java.io.InputStream;
058: import java.io.IOException;
059: import java.io.OutputStream;
060: import java.io.Reader;
061: import java.io.Writer;
062: import java.net.ServerSocket;
063: import java.net.Socket;
064: import java.net.HttpURLConnection;
065:
066: /**
067: *
068: * @author jbriggs
069: */
070: public final class IOUtils {
071:
072: private IOUtils() {
073: }
074:
075: /**
076: * close an input stream, but ensure any exceptions are 'swallowed' (but dumped as
077: * a stack trace)
078: */
079: public static final void close(InputStream is) {
080: if (is != null) {
081: try {
082: is.close();
083: } catch (Exception e) {
084: e.printStackTrace();
085: }
086: }
087: }
088:
089: /**
090: * close an output stream, but ensure any exceptions are 'swallowed' (but dumped as
091: * a stack trace)
092: */
093: public static final void close(OutputStream os) {
094: if (os != null) {
095: try {
096: os.close();
097: } catch (Exception e) {
098: e.printStackTrace();
099: }
100: }
101: }
102:
103: /**
104: * close a reader, but ensure any exceptions are 'swallowed' (but dumped as
105: * a stack trace)
106: */
107: public static final void close(Reader reader) {
108: if (reader != null) {
109: try {
110: reader.close();
111: } catch (Exception e) {
112: e.printStackTrace();
113: }
114: }
115: }
116:
117: /**
118: * close a server socket, but ensure any exceptions are 'swallowed' (but dumped as
119: * a stack trace)
120: */
121: public static final void close(ServerSocket socket) {
122: if (socket != null) {
123: try {
124: socket.close();
125: } catch (Exception e) {
126: e.printStackTrace();
127: }
128: }
129: }
130:
131: /**
132: * close a socket, but ensure any exceptions are 'swallowed' (but dumped as
133: * a stack trace)
134: */
135: public static final void close(Socket socket) {
136: if (socket != null) {
137: try {
138: socket.close();
139: } catch (Exception e) {
140: e.printStackTrace();
141: }
142: }
143: }
144:
145: /**
146: * close a writer, but ensure any exceptions are 'swallowed' (but dumped as
147: * a stack trace)
148: */
149: public static final void close(Writer writer) {
150: if (writer != null) {
151: try {
152: writer.close();
153: } catch (Exception e) {
154: e.printStackTrace();
155: }
156: }
157: }
158:
159: /**
160: * disconnect an http connection, ensuring exceptions are 'swallowed'
161: */
162: public static final void disconnect(HttpURLConnection conn) {
163: if (conn != null) {
164: try {
165: conn.disconnect();
166: } catch (Exception e) {
167: e.printStackTrace();
168: }
169: }
170: }
171:
172: public static final void flush(Writer w) {
173: if (w != null) {
174: try {
175: w.flush();
176: } catch (IOException e) {
177: e.printStackTrace();
178: }
179: }
180: }
181:
182: public static final void flush(OutputStream os) {
183: if (os != null) {
184: try {
185: os.flush();
186: } catch (IOException e) {
187: e.printStackTrace();
188: }
189: }
190: }
191:
192: public static final byte[] read(InputStream is) throws IOException {
193: int size = 0;
194:
195: int offset = 0;
196: byte[] b = new byte[1024];
197: byte[] tmp;
198: int len;
199: while ((len = is.read(b, offset, 1024)) > 0) {
200: size += len;
201: offset += len;
202:
203: if (len < 1024) {
204: break;
205: }
206:
207: tmp = new byte[size + 1024];
208: System.arraycopy(b, 0, tmp, 0, size);
209: b = tmp;
210: }
211:
212: if (b.length != size) {
213: tmp = new byte[size];
214: System.arraycopy(b, 0, tmp, 0, size);
215: b = tmp;
216: }
217:
218: return b;
219: }
220: }
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