001 package com.croftsoft.core.jnlp;
002
003 import java.io.*;
004 import java.net.*;
005
006 import javax.jnlp.*;
007
008 import com.croftsoft.core.io.SerializableLib;
009
010 /*********************************************************************
011 * JNLP Services.
012 *
013 * @version
014 * $Date: 2008/04/19 21:27:13 $
015 * @since
016 * 2002-12-21
017 * @author
018 * <a href="https://www.croftsoft.com/">David Wallace Croft</a>
019 *********************************************************************/
020
021 public final class JnlpServicesImpl
022 implements JnlpServices
023 //////////////////////////////////////////////////////////////////////
024 //////////////////////////////////////////////////////////////////////
025 {
026
027 public URL createFileContentsURL ( String fileContentsSpec )
028 throws MalformedURLException, UnsupportedOperationException
029 //////////////////////////////////////////////////////////////////////
030 {
031 return new URL ( getCodeBase ( ), fileContentsSpec );
032 }
033
034 public URL getCodeBase ( )
035 throws UnsupportedOperationException
036 //////////////////////////////////////////////////////////////////////
037 {
038 try
039 {
040 BasicService basicService = ( BasicService )
041 ServiceManager.lookup ( "javax.jnlp.BasicService" );
042
043 return basicService.getCodeBase ( );
044 }
045 catch ( UnavailableServiceException ex )
046 {
047 throw ( UnsupportedOperationException )
048 new UnsupportedOperationException ( ).initCause ( ex );
049 }
050 }
051
052 /*********************************************************************
053 * Loads a byte array.
054 *********************************************************************/
055 public byte [ ] loadBytesUsingPersistenceService (
056 String fileContentsSpec )
057 throws IOException, UnsupportedOperationException
058 //////////////////////////////////////////////////////////////////////
059 {
060 InputStream inputStream = null;
061
062 try
063 {
064 PersistenceService persistenceService = ( PersistenceService )
065 ServiceManager.lookup ( "javax.jnlp.PersistenceService" );
066
067 FileContents fileContents = persistenceService.get (
068 createFileContentsURL ( fileContentsSpec ) );
069
070 ByteArrayOutputStream byteArrayOutputStream
071 = new ByteArrayOutputStream ( );
072
073 inputStream
074 = new BufferedInputStream ( fileContents.getInputStream ( ) );
075
076 int i;
077
078 while ( ( i = inputStream.read ( ) ) > -1 )
079 {
080 byteArrayOutputStream.write ( i );
081 }
082
083 return byteArrayOutputStream.toByteArray ( );
084 }
085 catch ( FileNotFoundException ex )
086 {
087 return null;
088 }
089 catch ( UnavailableServiceException ex )
090 {
091 throw ( UnsupportedOperationException )
092 new UnsupportedOperationException ( ).initCause ( ex );
093 }
094 finally
095 {
096 if ( inputStream != null )
097 {
098 inputStream.close ( );
099 }
100 }
101 }
102
103 /*********************************************************************
104 * Loads GZIP compressed data.
105 *********************************************************************/
106 public Serializable loadSerializableUsingPersistenceService (
107 String fileContentsSpec )
108 throws ClassNotFoundException, IOException,
109 UnsupportedOperationException
110 //////////////////////////////////////////////////////////////////////
111 {
112 try
113 {
114 PersistenceService persistenceService = ( PersistenceService )
115 ServiceManager.lookup ( "javax.jnlp.PersistenceService" );
116
117 FileContents fileContents = persistenceService.get (
118 createFileContentsURL ( fileContentsSpec ) );
119
120 return SerializableLib.load ( fileContents.getInputStream ( ) );
121 }
122 catch ( FileNotFoundException ex )
123 {
124 return null;
125 }
126 catch ( UnavailableServiceException ex )
127 {
128 throw ( UnsupportedOperationException )
129 new UnsupportedOperationException ( ).initCause ( ex );
130 }
131 }
132
133 public void saveBytesUsingPersistenceService (
134 String fileContentsSpec,
135 byte [ ] bytes )
136 throws IOException, UnsupportedOperationException
137 //////////////////////////////////////////////////////////////////////
138 {
139 BufferedOutputStream bufferedOutputStream = null;
140
141 try
142 {
143 PersistenceService persistenceService = ( PersistenceService )
144 ServiceManager.lookup ( "javax.jnlp.PersistenceService" );
145
146 URL fileContentsURL
147 = createFileContentsURL ( fileContentsSpec );
148
149 try
150 {
151 persistenceService.delete ( fileContentsURL );
152 }
153 catch ( FileNotFoundException ex )
154 {
155 // ignore
156 }
157
158 persistenceService.create ( fileContentsURL, bytes.length );
159
160 FileContents fileContents
161 = persistenceService.get ( fileContentsURL );
162
163 bufferedOutputStream = new BufferedOutputStream (
164 fileContents.getOutputStream ( true ) );
165
166 bufferedOutputStream.write ( bytes );
167 }
168 catch ( UnavailableServiceException ex )
169 {
170 throw ( UnsupportedOperationException )
171 new UnsupportedOperationException ( ).initCause ( ex );
172 }
173 finally
174 {
175 if ( bufferedOutputStream != null )
176 {
177 bufferedOutputStream.close ( );
178 }
179 }
180 }
181
182 /*********************************************************************
183 * Saves data using GZIP compression.
184 *********************************************************************/
185 public void saveSerializableUsingPersistenceService (
186 String fileContentsSpec,
187 Serializable serializable )
188 throws IOException, UnsupportedOperationException
189 //////////////////////////////////////////////////////////////////////
190 {
191 saveBytesUsingPersistenceService (
192 fileContentsSpec,
193 SerializableLib.compress ( serializable ) );
194 }
195
196 public boolean showDocument ( URL url )
197 throws UnsupportedOperationException
198 //////////////////////////////////////////////////////////////////////
199 {
200 try
201 {
202 BasicService basicService = ( BasicService )
203 ServiceManager.lookup ( "javax.jnlp.BasicService" );
204
205 return basicService.showDocument ( url );
206 }
207 catch ( UnavailableServiceException ex )
208 {
209 throw ( UnsupportedOperationException )
210 new UnsupportedOperationException ( ).initCause ( ex );
211 }
212 }
213
214 //////////////////////////////////////////////////////////////////////
215 //////////////////////////////////////////////////////////////////////
216 }