41
|
1 |
/*
|
|
2 |
* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
|
|
3 |
* All rights reserved.
|
|
4 |
* This component and the accompanying materials are made available
|
|
5 |
* under the terms of "Eclipse Public License v1.0"
|
|
6 |
* which accompanies this distribution, and is available
|
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
8 |
*
|
|
9 |
* Initial Contributors:
|
|
10 |
* Nokia Corporation - initial contribution.
|
|
11 |
*
|
|
12 |
* Contributors:
|
|
13 |
*
|
|
14 |
* Description:
|
|
15 |
*
|
|
16 |
* Represents a location in source
|
|
17 |
*
|
|
18 |
*/
|
|
19 |
package com.nokia.tracecompiler.source;
|
|
20 |
|
|
21 |
import java.util.ArrayList;
|
|
22 |
import java.util.Collections;
|
|
23 |
import java.util.Iterator;
|
|
24 |
import java.util.List;
|
|
25 |
|
|
26 |
/**
|
|
27 |
* Represents a location in source
|
|
28 |
*
|
|
29 |
*/
|
|
30 |
public class SourceLocation extends SourceLocationBase {
|
|
31 |
|
|
32 |
/**
|
|
33 |
* Location listeners
|
|
34 |
*/
|
|
35 |
private ArrayList<SourceLocationListener> locationListeners;
|
|
36 |
|
|
37 |
/**
|
|
38 |
* Temporary array for callback purposes. Prevents concurrent modifications
|
|
39 |
* if listeners are removed during a callback
|
|
40 |
*/
|
|
41 |
private ArrayList<SourceLocationListener> tempListeners;
|
|
42 |
|
|
43 |
/**
|
|
44 |
* Reference count
|
|
45 |
*/
|
|
46 |
private int refCount = 0;
|
|
47 |
|
|
48 |
/**
|
|
49 |
* Listener change flag
|
|
50 |
*/
|
|
51 |
private boolean listenersChanged = true;
|
|
52 |
|
|
53 |
/**
|
|
54 |
* Constructor
|
|
55 |
*
|
|
56 |
* @param parser
|
|
57 |
* the parser owning this location
|
|
58 |
* @param offset
|
|
59 |
* offset of location
|
|
60 |
* @param length
|
|
61 |
* length of location
|
|
62 |
*/
|
|
63 |
public SourceLocation(SourceParser parser, int offset, int length) {
|
|
64 |
super(parser, offset, length);
|
|
65 |
parser.addLocation(this);
|
|
66 |
refCount = 1;
|
|
67 |
}
|
|
68 |
|
|
69 |
/**
|
|
70 |
* Gets the name of the class which owns this location
|
|
71 |
*
|
|
72 |
* @return the class name
|
|
73 |
*/
|
|
74 |
public String getClassName() {
|
|
75 |
String retval = null;
|
|
76 |
if (getParser() != null) {
|
|
77 |
SourceContext context = getParser().getContext(getOffset());
|
|
78 |
if (context != null) {
|
|
79 |
retval = context.getClassName();
|
|
80 |
}
|
|
81 |
}
|
|
82 |
return retval;
|
|
83 |
}
|
|
84 |
|
|
85 |
/**
|
|
86 |
* Gets the name of function which owns this location
|
|
87 |
*
|
|
88 |
* @return the function name
|
|
89 |
*/
|
|
90 |
public String getFunctionName() {
|
|
91 |
String retval = null;
|
|
92 |
if (getParser() != null) {
|
|
93 |
SourceContext context = getParser().getContext(getOffset());
|
|
94 |
if (context != null) {
|
|
95 |
retval = context.getFunctionName();
|
|
96 |
}
|
|
97 |
}
|
|
98 |
return retval;
|
|
99 |
}
|
|
100 |
|
|
101 |
/**
|
|
102 |
* Adds a location listener to this location
|
|
103 |
*
|
|
104 |
* @param listener
|
|
105 |
* the location listener
|
|
106 |
*/
|
|
107 |
public void addLocationListener(SourceLocationListener listener) {
|
|
108 |
if (locationListeners == null) {
|
|
109 |
locationListeners = new ArrayList<SourceLocationListener>();
|
|
110 |
}
|
|
111 |
locationListeners.add(listener);
|
|
112 |
listenersChanged = true;
|
|
113 |
}
|
|
114 |
|
|
115 |
/**
|
|
116 |
* Removes a location listener from this location
|
|
117 |
*
|
|
118 |
* @param listener
|
|
119 |
* the location listener
|
|
120 |
*/
|
|
121 |
public void removeLocationListener(SourceLocationListener listener) {
|
|
122 |
if (locationListeners != null) {
|
|
123 |
if (locationListeners.remove(listener)) {
|
|
124 |
listenersChanged = true;
|
|
125 |
}
|
|
126 |
}
|
|
127 |
}
|
|
128 |
|
|
129 |
/**
|
|
130 |
* Gets the listener interfaces
|
|
131 |
*
|
|
132 |
* @return the listeners
|
|
133 |
*/
|
|
134 |
protected Iterator<SourceLocationListener> getListeners() {
|
|
135 |
List<SourceLocationListener> list;
|
|
136 |
if (locationListeners != null) {
|
|
137 |
if (listenersChanged) {
|
|
138 |
listenersChanged = false;
|
|
139 |
if (tempListeners == null) {
|
|
140 |
tempListeners = new ArrayList<SourceLocationListener>();
|
|
141 |
}
|
|
142 |
tempListeners.clear();
|
|
143 |
tempListeners.addAll(locationListeners);
|
|
144 |
}
|
|
145 |
list = tempListeners;
|
|
146 |
} else {
|
|
147 |
list = Collections.emptyList();
|
|
148 |
}
|
|
149 |
return list.iterator();
|
|
150 |
}
|
|
151 |
|
|
152 |
/**
|
|
153 |
* Increases the reference count of this location.
|
|
154 |
*
|
|
155 |
* @see #dereference()
|
|
156 |
*/
|
|
157 |
public void reference() {
|
|
158 |
refCount++;
|
|
159 |
}
|
|
160 |
|
|
161 |
/**
|
|
162 |
* Decrements the reference count of this location. When reference count is
|
|
163 |
* 0, this is removed from source. Note that a location can also be removed
|
|
164 |
* from source even if it has outstanding references left. In that case it
|
|
165 |
* can no longer be selected.
|
|
166 |
*/
|
|
167 |
public void dereference() {
|
|
168 |
if (--refCount <= 0) {
|
|
169 |
removeFromSource();
|
|
170 |
}
|
|
171 |
}
|
|
172 |
|
|
173 |
/**
|
|
174 |
* Removes this location from the source
|
|
175 |
*/
|
|
176 |
private void removeFromSource() {
|
|
177 |
delete();
|
|
178 |
if (getParser() != null) {
|
|
179 |
getParser().removeLocation(this);
|
|
180 |
resetParser();
|
|
181 |
}
|
|
182 |
}
|
|
183 |
|
|
184 |
}
|