org/jsampler/DefaultLSConsoleModel.java

/*
 *   JSampler - a java front-end for LinuxSampler
 *
 *   Copyright (C) 2005, 2006 Grigor Kirilov Iliev
 *
 *   This file is part of JSampler.
 *
 *   JSampler is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2
 *   as published by the Free Software Foundation.
 *
 *   JSampler is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with JSampler; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *   MA  02111-1307  USA
 */

package org.jsampler;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import java.net.Socket;

import java.util.LinkedList;
import java.util.Vector;

import java.util.logging.Level;

import javax.swing.SwingUtilities;

import net.sf.juife.event.TaskEvent;
import net.sf.juife.event.TaskListener;

import org.jsampler.event.LSConsoleEvent;
import org.jsampler.event.LSConsoleListener;

import org.jsampler.task.LSConsoleConnect;

import static org.jsampler.JSI18n.i18n;


/**
 * This class provides default implementation of the <code>LSConsoleModel</code> interface.
 * @author Grigor Iliev
 */
public class DefaultLSConsoleModel implements LSConsoleModel {
        private Socket socket;
        private LscpOutputStream out;
        
        private final String[] cmdList = LscpUtils.getCommandList();
        
        private String cmdLine = "";
        
        /**
         * Contains the global command history, excluding blank lines and comments.
         */
        private final LinkedList<String> cmdHistory = new LinkedList<String>();
        
        private int cmdHistoryIdx = -1;
        
        private int commandHistorySize = 1000;
        
        private final LSConsoleThread lsConsoleThread = new LSConsoleThread();
        
        /**
         * Contains the command history of the current
         * session, including blank lines and comments.
         */
        private final Vector<String> sessionHistory = new Vector<String>();
        
        /** Used to hold the current command when browsing through command history, etc. */
        private String currentCmd = "";
        
        private final Vector<LSConsoleListener> listeners = new Vector<LSConsoleListener>();
        
        
        /** Creates a new instance of <code>DefaultLSConsoleModel</code>. */
        public
        DefaultLSConsoleModel() {
                reconnect();
                
                CC.addReconnectListener(new ActionListener() {
                        public void
                        actionPerformed(ActionEvent e) { reconnect(); }
                });
                
                lsConsoleThread.start();
        }
        
        private Socket
        getSocket() { return socket; }
        
        private void
        setSocket(Socket socket) { this.socket = socket; }
        
        private void
        reconnect() {
                final LSConsoleConnect cnt = new LSConsoleConnect(getSocket());
                
                cnt.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) { changeSocket(cnt.getResult()); }
                });
                
                CC.getTaskQueue().add(cnt);
        }
        
        private void
        changeSocket(Socket sock) {
                setSocket(sock);
                
                try {
                        LscpInputStream in;
                        in = sock == null ? null : new LscpInputStream(sock.getInputStream());
                        out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
                        
                        lsConsoleThread.setInputStream(in);
                } catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
        }
        
        /**
         * Registers the specified listener for receiving event messages.
         * @param l The <code>LSConsoleListener</code> to register.
         */
        public void
        addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>LSConsoleListener</code> to remove.
         */
        public void
        removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
        
        /** Executes the command specified in the command line. */
        public void
        execCommand() {
                String cmd = getCommandLineText();
                sessionHistory.add(cmd);
                if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
                while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
                
                setCommandLineText("");
                currentCmd = "";
                cmdHistoryIdx = -1;
                
                if( getSocket() == null || getSocket().isClosed() || !getSocket().isConnected() 
                        || getSocket().isOutputShutdown() || out == null ) {
                        
                        fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
                } else {
                        CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
                }
                
                fireCommandExecuted();
        }
        
        /**
         * Gets the last executed command.
         * @return The last command executed in the LS Console.
         */
        public String
        getLastExecutedCommand() {
                int size = sessionHistory.size();
                return size == 0 ? "" : sessionHistory.get(size - 1);
        }
        
        /**
         * Sets the text in the command line.
         * @param cmdLine The new command line text.
         */
        public void
        setCommandLineText(String cmdLine) {
                if(this.cmdLine.equals(cmdLine)) return;
                
                String oldCmdLine = this.cmdLine;
                this.cmdLine = cmdLine;
                fireCommandLineTextChanged(oldCmdLine);
        }
        
        /**
         * Gets the text in the command line.
         * @return The command line's text.
         */
        public String
        getCommandLineText() { return cmdLine; }
        
        /**
         * Gets the command history of the current session, including blank lines and comments.
         * @return The command history of the current session, including blank lines and comments.
         */
        public String[]
        getSessionHistory() {
                return sessionHistory.toArray(new String[sessionHistory.size()]);
        }
        
        /**
         * Clears the session history.
         * @see #getSessionHistory
         */
        public void
        clearSessionHistory() { sessionHistory.removeAllElements(); }
        
        /**
         * Adds the specified <code>command</code> to command history.
         * @param command The command to be added to command history.
         */
        public void
        addToCommandHistory(String command) { cmdHistory.add(command); }
        
        /**
         * Gets the complete command history, excluding blank lines and comments.
         * @return The complete command history, excluding blank lines and comments.
         */
        public String[]
        getCommandHistory() {
                return cmdHistory.toArray(new String[cmdHistory.size()]);
        }
        
        /**
         * Clears the complete/multisession command history.
         * @see #getCommandHistory
         */
        public void
        clearCommandHistory() {
                cmdHistory.clear();
                cmdHistoryIdx = -1;
        }
        
        /**
         * Determines the maximum number of lines to be kept in the command history.
         * @return The maximum number of lines to be kept in the command history.
         */
        public int
        getCommandHistorySize() { return commandHistorySize; }
        
        /**
         * Sets the maximum number of lines to be kept in the command history.
         * @param size Determines the maximum number of lines to be kept in the command history.
         */
        public void
        setCommandHistorySize(int size) { commandHistorySize = size; }
        
        /**
         * Gets a list of all LSCP commands.
         * @return A list of all LSCP commands.
         */
        public String[]
        getCommandList() { return cmdList; }
        
        /** Browses the command history one line up. */
        public void
        browseCommandHistoryUp() {
                if(cmdHistory.size() == 0) return;
                        
                if(cmdHistoryIdx == -1) {
                        currentCmd = getCommandLineText();
                        cmdHistoryIdx = cmdHistory.size() - 1;
                        setCommandLineText(cmdHistory.get(cmdHistoryIdx));
                        return;
                }
                
                if(cmdHistoryIdx == 0) return;
                
                setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
        }
        
        /** Browses the command history one line down. */
        public void
        browseCommandHistoryDown() {
                if(cmdHistory.size() == 0 || cmdHistoryIdx == -1) return;
                if(cmdHistoryIdx == cmdHistory.size() - 1) {
                        cmdHistoryIdx = -1;
                        setCommandLineText(currentCmd);
                        currentCmd = "";
                        return;
                }
                
                setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
        }
        
        /** Browses to the first line of the command history. */
        public void
        browseCommandHistoryFirst() {
                if(cmdHistory.size() == 0) return;
                cmdHistoryIdx = 0;
                setCommandLineText(cmdHistory.get(cmdHistoryIdx));
        }
        
        /** Browses to the last line of the command history. */
        public void
        browseCommandHistoryLast() {
                if(cmdHistory.size() == 0) return;
                cmdHistoryIdx = cmdHistory.size() - 1;
                setCommandLineText(cmdHistory.get(cmdHistoryIdx));
        }
        
        private Vector<String> tmpVector = new Vector<String>();
        
        /**
         * Searches the command history for commands
         * containing the string returned by {@link #getCommandLineText}.
         * @return All commands that contains the string returned by {@link #getCommandLineText}.
         * @see #getCommandHistory
         */
        public String[]
        searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
        
        /**
         * Searches the command history for commands containing <code>substring</code>.
         * @param substring The substring to be used to perform the search.
         * @return All commands that contains <code>substring</code>.
         * @see #getCommandList
         */
        public String[]
        searchCommandHistory(String substring) {
                tmpVector.removeAllElements();
                for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
                
                return tmpVector.toArray(new String[tmpVector.size()]);
        }
        
        /**
         * Searches the LSCP command list for commands
         * containing the string returned by {@link #getCommandLineText}.
         * @return All commands that contains the string returned by {@link #getCommandLineText}.
         * @see #getCommandList
         */
        public String[]
        searchCommandList() { return searchCommandList(getCommandLineText()); }
        
        /**
         * Searches the LSCP command list for commands containing <code>substring</code>.
         * @param substring The substring to be used to perform the search.
         * @return All commands that contains <code>substring</code>.
         * @see #getCommandList
         */
        public String[]
        searchCommandList(String substring) {
                tmpVector.removeAllElements();
                for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
                
                return tmpVector.toArray(new String[tmpVector.size()]);
        }
        
        /** Notifies listeners that the text in the command line has changed. */
        private void
        fireCommandLineTextChanged(String oldCmdLine) {
                LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
                for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
        }
        
        /** Notifies listeners that the command in the command line has been executed. */
        private void
        fireCommandExecuted() {
                LSConsoleEvent e = new LSConsoleEvent(this);
                for(LSConsoleListener l : listeners) l.commandExecuted(e);
        }
        
        /**
         * Notifies listeners that response is received from LinuxSampler.
         * @param response The response received from LinuxSampler.
         */
        private void
        fireResponseReceived(final String response) {
                SwingUtilities.invokeLater(new Runnable() {
                        public void
                        run() {
                                LSConsoleEvent e = new LSConsoleEvent(this, response);
                                for(LSConsoleListener l : listeners) l.responseReceived(e);
                        }
                });
        }
        
        /** Executes LS Console command. */
        private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
                private String cmd;
                
                /** Creates a new instance of <code>LSConsoleExecCommand</code>. */
                public
                LSConsoleExecCommand(String cmd) {
                        setTitle("LSConsoleExecCommand_task");
                        setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
                        this.cmd = cmd;
                }
        
                /** The entry point of the task. */
                public void
                run() {
                        try { out.writeLine(cmd); }
                        catch(Exception x) {
                                setErrorMessage(getDescription() + ": " + HF.getErrorMessage(x));
                                CC.getLogger().log(Level.FINE, getErrorMessage(), x);
                        }
                }
        }

        class LSConsoleThread extends Thread {
                LscpInputStream in;
                private boolean terminate = false;
                
                LSConsoleThread() {super("LS-Console-Thread"); }
                
                public void
                run() {
                        while(!mustTerminate()) {
                                try { processInput(); }
                                catch(Exception x) {
                                        CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                                }
                                
                                try { synchronized(this) { wait(100); } }
                                catch(Exception x) {
                                        CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                                }
                        }
                }
        
                private synchronized boolean
                mustTerminate() { return terminate; }
                
                public synchronized void
                terminate() {
                        terminate = true;
                        this.notifyAll();
                }
                
                /** Processes the input sent by LinuxSampler */
                private synchronized void
                processInput() throws IOException {
                        while(in != null && in.available() > 0) {
                                String response = in.readLine();
                                fireResponseReceived(response); 
                        }
                }
                
                public synchronized void
                setInputStream(LscpInputStream in) { this.in = in; }
        }
        
        class LscpInputStream {
                private InputStream in;
                private StringBuffer buf = new StringBuffer();
                
                /**
                 * Creates a new instance of LscpInputStream.
                 *
                 */
                public
                LscpInputStream(InputStream in) {
                        this.in = in;
                }
        
                /**
                 * Reads a line. 
                 * This method is thread safe.
                 * 
                 * @return A string containing the next line readed from the stream or
                 * <code>null</code> if the end of the stream has been reached.
                 * @throws IOException If an I/O error occurs.
                 */
                public synchronized String
                readLine() throws IOException {
                        int i;
                        buf.setLength(0);
                
                        while((i = in.read()) != -1) {
                                if(i == '\r') {
                                        checkLF();
                                        break;
                                }
                                buf.append((char)i);
                        }
                
                        if(i == -1) {
                                if(buf.length() > 0)
                                        throw new IOException("Unexpected end of line!");
                                return null;
                        }
                        return buf.toString();
                }
        
                /**
                 * Returns the number of bytes that can
                 * be read from this input stream without blocking.
                 *
                 * @return The number of bytes that can
                 * be read from this input stream without blocking.
                 * @throws IOException If an I/O error occurs.
                 */
                public synchronized int
                available() throws IOException { return in.available(); }
        
                private void
                checkLF() throws IOException {
                        int i = in.read();
                        if(i == -1) throw new IOException("Unexpected end of file!");
                        if(i != '\n') throw new IOException("Unexpected end of line!");
                }
        }
        
        class LscpOutputStream {
                private OutputStream out;
        
                /** Creates a new instance of LscpOutputStream */
                public
                LscpOutputStream(OutputStream out) { this.out = out; }
        
                /*
                 * Writes a line.
                 * @param line a string to be written.
                 */
                public void
                writeLine(String line) throws IOException {
                        try {
                                out.write(line.getBytes("US-ASCII"));
                                out.write('\r');
                                out.write('\n');
                                out.flush();
                        } catch(UnsupportedEncodingException x) { 
                                CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                        }
                }
        }
}
1	iliev	913	/*
2			* JSampler - a java front-end for LinuxSampler
3			*
4			* Copyright (C) 2005, 2006 Grigor Kirilov Iliev
5			*
6			* This file is part of JSampler.
7			*
8			* JSampler is free software; you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License version 2
10			* as published by the Free Software Foundation.
11			*
12			* JSampler is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with JSampler; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20			* MA 02111-1307 USA
21			*/
22
23			package org.jsampler;
24
25			import java.awt.event.ActionEvent;
26			import java.awt.event.ActionListener;
27
28			import java.io.InputStream;
29			import java.io.IOException;
30			import java.io.OutputStream;
31			import java.io.UnsupportedEncodingException;
32
33			import java.net.Socket;
34
35			import java.util.LinkedList;
36			import java.util.Vector;
37
38			import java.util.logging.Level;
39
40			import javax.swing.SwingUtilities;
41
42			import net.sf.juife.event.TaskEvent;
43			import net.sf.juife.event.TaskListener;
44
45			import org.jsampler.event.LSConsoleEvent;
46			import org.jsampler.event.LSConsoleListener;
47
48			import org.jsampler.task.LSConsoleConnect;
49
50			import static org.jsampler.JSI18n.i18n;
51
52
53			/**
54			* This class provides default implementation of the <code>LSConsoleModel</code> interface.
55			* @author Grigor Iliev
56			*/
57			public class DefaultLSConsoleModel implements LSConsoleModel {
58			private Socket socket;
59			private LscpOutputStream out;
60
61			private final String[] cmdList = LscpUtils.getCommandList();
62
63			private String cmdLine = "";
64
65			/**
66			* Contains the global command history, excluding blank lines and comments.
67			*/
68			private final LinkedList<String> cmdHistory = new LinkedList<String>();
69
70			private int cmdHistoryIdx = -1;
71
72			private int commandHistorySize = 1000;
73
74			private final LSConsoleThread lsConsoleThread = new LSConsoleThread();
75
76			/**
77			* Contains the command history of the current
78			* session, including blank lines and comments.
79			*/
80			private final Vector<String> sessionHistory = new Vector<String>();
81
82			/** Used to hold the current command when browsing through command history, etc. */
83			private String currentCmd = "";
84
85			private final Vector<LSConsoleListener> listeners = new Vector<LSConsoleListener>();
86
87
88			/** Creates a new instance of <code>DefaultLSConsoleModel</code>. */
89			public
90			DefaultLSConsoleModel() {
91			reconnect();
92
93			CC.addReconnectListener(new ActionListener() {
94			public void
95			actionPerformed(ActionEvent e) { reconnect(); }
96			});
97
98			lsConsoleThread.start();
99			}
100
101			private Socket
102			getSocket() { return socket; }
103
104			private void
105			setSocket(Socket socket) { this.socket = socket; }
106
107			private void
108			reconnect() {
109			final LSConsoleConnect cnt = new LSConsoleConnect(getSocket());
110
111			cnt.addTaskListener(new TaskListener() {
112			public void
113			taskPerformed(TaskEvent e) { changeSocket(cnt.getResult()); }
114			});
115
116			CC.getTaskQueue().add(cnt);
117			}
118
119			private void
120			changeSocket(Socket sock) {
121			setSocket(sock);
122
123			try {
124			LscpInputStream in;
125			in = sock == null ? null : new LscpInputStream(sock.getInputStream());
126			out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
127
128			lsConsoleThread.setInputStream(in);
129			} catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
130			}
131
132			/**
133			* Registers the specified listener for receiving event messages.
134			* @param l The <code>LSConsoleListener</code> to register.
135			*/
136			public void
137			addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
138
139			/**
140			* Removes the specified listener.
141			* @param l The <code>LSConsoleListener</code> to remove.
142			*/
143			public void
144			removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
145
146			/** Executes the command specified in the command line. */
147			public void
148			execCommand() {
149			String cmd = getCommandLineText();
150			sessionHistory.add(cmd);
151			if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
152			while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
153
154			setCommandLineText("");
155			currentCmd = "";
156			cmdHistoryIdx = -1;
157
158			if( getSocket() == null \|\| getSocket().isClosed() \|\| !getSocket().isConnected()
159			\|\| getSocket().isOutputShutdown() \|\| out == null ) {
160
161			fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
162			} else {
163			CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
164			}
165
166			fireCommandExecuted();
167			}
168
169			/**
170			* Gets the last executed command.
171			* @return The last command executed in the LS Console.
172			*/
173			public String
174			getLastExecutedCommand() {
175			int size = sessionHistory.size();
176			return size == 0 ? "" : sessionHistory.get(size - 1);
177			}
178
179			/**
180			* Sets the text in the command line.
181			* @param cmdLine The new command line text.
182			*/
183			public void
184			setCommandLineText(String cmdLine) {
185			if(this.cmdLine.equals(cmdLine)) return;
186
187			String oldCmdLine = this.cmdLine;
188			this.cmdLine = cmdLine;
189			fireCommandLineTextChanged(oldCmdLine);
190			}
191
192			/**
193			* Gets the text in the command line.
194			* @return The command line's text.
195			*/
196			public String
197			getCommandLineText() { return cmdLine; }
198
199			/**
200			* Gets the command history of the current session, including blank lines and comments.
201			* @return The command history of the current session, including blank lines and comments.
202			*/
203			public String[]
204			getSessionHistory() {
205			return sessionHistory.toArray(new String[sessionHistory.size()]);
206			}
207
208			/**
209			* Clears the session history.
210			* @see #getSessionHistory
211			*/
212			public void
213			clearSessionHistory() { sessionHistory.removeAllElements(); }
214
215			/**
216			* Adds the specified <code>command</code> to command history.
217			* @param command The command to be added to command history.
218			*/
219			public void
220			addToCommandHistory(String command) { cmdHistory.add(command); }
221
222			/**
223			* Gets the complete command history, excluding blank lines and comments.
224			* @return The complete command history, excluding blank lines and comments.
225			*/
226			public String[]
227			getCommandHistory() {
228			return cmdHistory.toArray(new String[cmdHistory.size()]);
229			}
230
231			/**
232			* Clears the complete/multisession command history.
233			* @see #getCommandHistory
234			*/
235			public void
236			clearCommandHistory() {
237			cmdHistory.clear();
238			cmdHistoryIdx = -1;
239			}
240
241			/**
242			* Determines the maximum number of lines to be kept in the command history.
243			* @return The maximum number of lines to be kept in the command history.
244			*/
245			public int
246			getCommandHistorySize() { return commandHistorySize; }
247
248			/**
249			* Sets the maximum number of lines to be kept in the command history.
250			* @param size Determines the maximum number of lines to be kept in the command history.
251			*/
252			public void
253			setCommandHistorySize(int size) { commandHistorySize = size; }
254
255			/**
256			* Gets a list of all LSCP commands.
257			* @return A list of all LSCP commands.
258			*/
259			public String[]
260			getCommandList() { return cmdList; }
261
262			/** Browses the command history one line up. */
263			public void
264			browseCommandHistoryUp() {
265			if(cmdHistory.size() == 0) return;
266
267			if(cmdHistoryIdx == -1) {
268			currentCmd = getCommandLineText();
269			cmdHistoryIdx = cmdHistory.size() - 1;
270			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
271			return;
272			}
273
274			if(cmdHistoryIdx == 0) return;
275
276			setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
277			}
278
279			/** Browses the command history one line down. */
280			public void
281			browseCommandHistoryDown() {
282			if(cmdHistory.size() == 0 \|\| cmdHistoryIdx == -1) return;
283			if(cmdHistoryIdx == cmdHistory.size() - 1) {
284			cmdHistoryIdx = -1;
285			setCommandLineText(currentCmd);
286			currentCmd = "";
287			return;
288			}
289
290			setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
291			}
292
293			/** Browses to the first line of the command history. */
294			public void
295			browseCommandHistoryFirst() {
296			if(cmdHistory.size() == 0) return;
297			cmdHistoryIdx = 0;
298			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
299			}
300
301			/** Browses to the last line of the command history. */
302			public void
303			browseCommandHistoryLast() {
304			if(cmdHistory.size() == 0) return;
305			cmdHistoryIdx = cmdHistory.size() - 1;
306			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
307			}
308
309			private Vector<String> tmpVector = new Vector<String>();
310
311			/**
312			* Searches the command history for commands
313			* containing the string returned by {@link #getCommandLineText}.
314			* @return All commands that contains the string returned by {@link #getCommandLineText}.
315			* @see #getCommandHistory
316			*/
317			public String[]
318			searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
319
320			/**
321			* Searches the command history for commands containing <code>substring</code>.
322			* @param substring The substring to be used to perform the search.
323			* @return All commands that contains <code>substring</code>.
324			* @see #getCommandList
325			*/
326			public String[]
327			searchCommandHistory(String substring) {
328			tmpVector.removeAllElements();
329			for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
330
331			return tmpVector.toArray(new String[tmpVector.size()]);
332			}
333
334			/**
335			* Searches the LSCP command list for commands
336			* containing the string returned by {@link #getCommandLineText}.
337			* @return All commands that contains the string returned by {@link #getCommandLineText}.
338			* @see #getCommandList
339			*/
340			public String[]
341			searchCommandList() { return searchCommandList(getCommandLineText()); }
342
343			/**
344			* Searches the LSCP command list for commands containing <code>substring</code>.
345			* @param substring The substring to be used to perform the search.
346			* @return All commands that contains <code>substring</code>.
347			* @see #getCommandList
348			*/
349			public String[]
350			searchCommandList(String substring) {
351			tmpVector.removeAllElements();
352			for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
353
354			return tmpVector.toArray(new String[tmpVector.size()]);
355			}
356
357			/** Notifies listeners that the text in the command line has changed. */
358			private void
359			fireCommandLineTextChanged(String oldCmdLine) {
360			LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
361			for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
362			}
363
364			/** Notifies listeners that the command in the command line has been executed. */
365			private void
366			fireCommandExecuted() {
367			LSConsoleEvent e = new LSConsoleEvent(this);
368			for(LSConsoleListener l : listeners) l.commandExecuted(e);
369			}
370
371			/**
372			* Notifies listeners that response is received from LinuxSampler.
373			* @param response The response received from LinuxSampler.
374			*/
375			private void
376			fireResponseReceived(final String response) {
377			SwingUtilities.invokeLater(new Runnable() {
378			public void
379			run() {
380			LSConsoleEvent e = new LSConsoleEvent(this, response);
381			for(LSConsoleListener l : listeners) l.responseReceived(e);
382			}
383			});
384			}
385
386			/** Executes LS Console command. */
387			private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
388			private String cmd;
389
390			/** Creates a new instance of <code>LSConsoleExecCommand</code>. */
391			public
392			LSConsoleExecCommand(String cmd) {
393			setTitle("LSConsoleExecCommand_task");
394			setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
395			this.cmd = cmd;
396			}
397
398			/** The entry point of the task. */
399			public void
400			run() {
401			try { out.writeLine(cmd); }
402			catch(Exception x) {
403			setErrorMessage(getDescription() + ": " + HF.getErrorMessage(x));
404			CC.getLogger().log(Level.FINE, getErrorMessage(), x);
405			}
406			}
407			}
408
409			class LSConsoleThread extends Thread {
410			LscpInputStream in;
411			private boolean terminate = false;
412
413			LSConsoleThread() {super("LS-Console-Thread"); }
414
415			public void
416			run() {
417			while(!mustTerminate()) {
418			try { processInput(); }
419			catch(Exception x) {
420			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
421			}
422
423			try { synchronized(this) { wait(100); } }
424			catch(Exception x) {
425			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
426			}
427			}
428			}
429
430			private synchronized boolean
431			mustTerminate() { return terminate; }
432
433			public synchronized void
434			terminate() {
435			terminate = true;
436			this.notifyAll();
437			}
438
439			/** Processes the input sent by LinuxSampler */
440			private synchronized void
441			processInput() throws IOException {
442			while(in != null && in.available() > 0) {
443			String response = in.readLine();
444			fireResponseReceived(response);
445			}
446			}
447
448			public synchronized void
449			setInputStream(LscpInputStream in) { this.in = in; }
450			}
451
452			class LscpInputStream {
453			private InputStream in;
454			private StringBuffer buf = new StringBuffer();
455
456			/**
457			* Creates a new instance of LscpInputStream.
458			*
459			*/
460			public
461			LscpInputStream(InputStream in) {
462			this.in = in;
463			}
464
465			/**
466			* Reads a line.
467			* This method is thread safe.
468			*
469			* @return A string containing the next line readed from the stream or
470			* <code>null</code> if the end of the stream has been reached.
471			* @throws IOException If an I/O error occurs.
472			*/
473			public synchronized String
474			readLine() throws IOException {
475			int i;
476			buf.setLength(0);
477
478			while((i = in.read()) != -1) {
479			if(i == '\r') {
480			checkLF();
481			break;
482			}
483			buf.append((char)i);
484			}
485
486			if(i == -1) {
487			if(buf.length() > 0)
488			throw new IOException("Unexpected end of line!");
489			return null;
490			}
491			return buf.toString();
492			}
493
494			/**
495			* Returns the number of bytes that can
496			* be read from this input stream without blocking.
497			*
498			* @return The number of bytes that can
499			* be read from this input stream without blocking.
500			* @throws IOException If an I/O error occurs.
501			*/
502			public synchronized int
503			available() throws IOException { return in.available(); }
504
505			private void
506			checkLF() throws IOException {
507			int i = in.read();
508			if(i == -1) throw new IOException("Unexpected end of file!");
509			if(i != '\n') throw new IOException("Unexpected end of line!");
510			}
511			}
512
513			class LscpOutputStream {
514			private OutputStream out;
515
516			/** Creates a new instance of LscpOutputStream */
517			public
518			LscpOutputStream(OutputStream out) { this.out = out; }
519
520			/*
521			* Writes a line.
522			* @param line a string to be written.
523			*/
524			public void
525			writeLine(String line) throws IOException {
526			try {
527			out.write(line.getBytes("US-ASCII"));
528			out.write('\r');
529			out.write('\n');
530			out.flush();
531			} catch(UnsupportedEncodingException x) {
532			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
533			}
534			}
535			}
536			}