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19 package org.netbeans.modules.javacore.jmiimpl.javamodel;
20
21 import org.netbeans.api.mdr.MDRObject;
22 import org.netbeans.jmi.javamodel.Feature;
23 import org.netbeans.jmi.javamodel.JavaModelPackage;
24 import org.netbeans.mdr.handlers.ClassProxyHandler;
25 import org.netbeans.mdr.storagemodel.StorableClass;
26 import javax.jmi.model.MofClass;
27 import javax.jmi.reflect.RefObject;
28 import java.lang.ref.WeakReference  ;
29 import java.util.*;
30
31
32
37 public abstract class MetadataElementClass extends ClassProxyHandler {
38 private WeakReference allOfClass = null;
39 private WeakReference allOfType = null;
40
41
42 public MetadataElementClass(StorableClass s) {
43 super(s);
44 }
45
46 protected boolean _pushIterators(Collection iterators, Object obj, boolean includeSupertypes) {
47 boolean pushed = false;
48 if (obj == null)
49 return pushed;
50
51 if (obj instanceof MetadataElement) {
71 Collection children = ((MetadataElement) obj).getChildren();
72 if (children != null && !children.isEmpty()) {
73 iterators.add(children.iterator());
74 pushed = true;
75 }
76 }
77 else if (obj instanceof List) {
78 iterators.add(((List) obj).iterator());
79 pushed = true;
80 }
81
82 return pushed;
83 }
84
85 protected boolean _accept(Object obj, boolean includeSupertypes) {
86 if (obj == null || !(obj instanceof RefObject))
87 return false;
88 return ((RefObject) obj).refIsInstanceOf(refMetaObject(), includeSupertypes);
89 }
90
91 protected boolean _isAbstract() {
92 return ((MofClass) refMetaObject()).isAbstract();
93 }
94
95 protected Collection _allOfClass(boolean includeSubtypes) {
96 Collection result;
99 if (includeSubtypes) {
100 if (allOfType == null || (result = (Collection) allOfType.get()) == null) {
101 result = new AllOfClassCollection(true, (JavaModelPackage) refImmediatePackage());
102 allOfType = new WeakReference (result);
103 }
104 } else {
105 if (_isAbstract()) {
106 result = Collections.EMPTY_LIST;
107 } else {
108 if (allOfClass == null || (result = (Collection) allOfClass.get()) == null) {
109 result = new AllOfClassCollection(false, (JavaModelPackage) refImmediatePackage());
110 allOfClass = new WeakReference (result);
111 }
112 }
113 }
114 return result;
115 }
116
117 private class AllOfClassCollection extends AbstractCollection {
118 private final boolean includeSubtypes;
119 private final JavaModelPackage extent;
120
121 public AllOfClassCollection(boolean includeSubtypes, JavaModelPackage extent) {
122 this.includeSubtypes = includeSubtypes;
123 this.extent = extent;
124 }
125
126 public Iterator iterator() {
127 return new It();
128 }
129
130 public int size() {
131 lock();
132 try {
133 int size = 0;
134 for (Iterator it = iterator(); it.hasNext(); it.next(), size++);
135 return size;
136 } finally {
137 unlock();
138 }
139 }
140
141 private void lock() {
142 ((MDRObject) extent).repository().beginTrans(false);
143 }
144
145 private void unlock() {
146 ((MDRObject) extent).repository().endTrans();
147 }
148
149 private class It implements Iterator {
150 private final List iterators = new ArrayList();
151 private Iterator currentIterator;
152 private Object lastItem = null;
153
154 public It() {
155 currentIterator = extent.getResource().refAllOfClass().iterator();
156 }
157
158 public boolean hasNext() {
159 while (lastItem == null && (!iterators.isEmpty() || currentIterator.hasNext())) {
160 while (lastItem == null && currentIterator.hasNext()) {
161 Object temp = currentIterator.next();
162 if (_pushIterators(iterators, temp, includeSubtypes)) {
163 iterators.add(currentIterator);
164 currentIterator = (Iterator) iterators.remove(0);
165 }
166 if (_accept(temp, includeSubtypes)) {
167 lastItem = temp;
168 }
169 else if (temp instanceof Feature && _accept(((Feature)temp).getJavadoc(), includeSubtypes)) {
170 lastItem = ((Feature)temp).getJavadoc();
171 }
172 }
173 if (lastItem == null) {
174 currentIterator = (Iterator) iterators.remove(0);
175 }
176 }
177 return lastItem != null;
178 }
179
180 public Object next() {
181 lock();
182 try {
183 if (hasNext()) {
184 Object result = lastItem;
185 lastItem = null;
186 return result;
187 } else {
188 throw new NoSuchElementException();
189 }
190 } finally {
191 unlock();
192 }
193 }
194
195 public void remove() {
196 throw new UnsupportedOperationException ();
197 }
198 }
199 }
200 }
201 |
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