org/jsampler/DefaultLSConsoleModel.java

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