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package org.mule.module.launcher.util; |
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import java.beans.PropertyChangeListener; |
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import java.beans.PropertyChangeSupport; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.ListIterator; |
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public class ObservableList<E> implements List<E> { |
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private List<E> delegate; |
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private PropertyChangeSupport pcs; |
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public ObservableList() { |
45 | 0 | this(new ArrayList<E>()); |
46 | 0 | } |
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48 | 0 | public ObservableList(List<E> delegate) { |
49 | 0 | this.delegate = delegate; |
50 | 0 | pcs = new PropertyChangeSupport(this); |
51 | 0 | } |
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public void add(int index, E element) { |
54 | 0 | delegate.add(index, element); |
55 | 0 | pcs.firePropertyChange(new ElementAddedEvent(this, element, index)); |
56 | 0 | } |
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public boolean addAll(Collection<? extends E> c) { |
60 | 0 | int index = size() - 1; |
61 | 0 | index = index < 0 ? 0 : index; |
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63 | 0 | boolean success = delegate.addAll(c); |
64 | 0 | if (success && c != null) { |
65 | 0 | List<E> values = new ArrayList<E>(); |
66 | 0 | for (E element : values) { |
67 | 0 | values.add(element); |
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} |
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70 | 0 | if (values.size() > 0) { |
71 | 0 | pcs.firePropertyChange(new MultiElementAddedEvent(this, index, values)); |
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} |
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} |
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75 | 0 | return success; |
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} |
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public boolean addAll(int index, Collection<? extends E> c) { |
79 | 0 | boolean success = delegate.addAll(index, c); |
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81 | 0 | if (success && c != null) { |
82 | 0 | List<E> values = new ArrayList<E>(); |
83 | 0 | for (E element : c) { |
84 | 0 | values.add(element); |
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} |
86 | 0 | if (values.size() > 0) { |
87 | 0 | pcs.firePropertyChange(new MultiElementAddedEvent(this, index, values)); |
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} |
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} |
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91 | 0 | return success; |
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} |
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public void clear() { |
95 | 0 | List values = new ArrayList(); |
96 | 0 | values.addAll(delegate); |
97 | 0 | delegate.clear(); |
98 | 0 | if (!values.isEmpty()) { |
99 | 0 | pcs.firePropertyChange(new ElementsClearedEvent(this, values)); |
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} |
101 | 0 | } |
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public boolean contains(Object o) { |
104 | 0 | return delegate.contains(o); |
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} |
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public boolean containsAll(Collection<?> c) { |
108 | 0 | return delegate.containsAll(c); |
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} |
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public boolean equals(Object o) { |
112 | 0 | return delegate.equals(o); |
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} |
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public E get(int index) { |
116 | 0 | return delegate.get(index); |
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} |
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public int hashCode() { |
120 | 0 | return delegate.hashCode(); |
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} |
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public int indexOf(Object o) { |
124 | 0 | return delegate.indexOf(o); |
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} |
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public boolean isEmpty() { |
128 | 0 | return delegate.isEmpty(); |
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} |
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public Iterator<E> iterator() { |
132 | 0 | return new ObservableIterator(delegate.iterator()); |
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} |
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public int lastIndexOf(Object o) { |
136 | 0 | return delegate.lastIndexOf(o); |
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} |
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public ListIterator<E> listIterator() { |
140 | 0 | return new ObservableListIterator(delegate.listIterator(), 0); |
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} |
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public ListIterator<E> listIterator(int index) { |
144 | 0 | return new ObservableListIterator(delegate.listIterator(index), index); |
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} |
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public E remove(int index) { |
148 | 0 | E element = delegate.remove(index); |
149 | 0 | pcs.firePropertyChange(new ElementRemovedEvent(this, element, index)); |
150 | 0 | return element; |
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} |
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public boolean remove(Object o) { |
154 | 0 | int index = delegate.indexOf(o); |
155 | 0 | boolean success = delegate.remove(o); |
156 | 0 | if (success) { |
157 | 0 | pcs.firePropertyChange(new ElementRemovedEvent(this, o, index)); |
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} |
159 | 0 | return success; |
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} |
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public boolean removeAll(Collection<?> c) { |
163 | 0 | if (c == null) { |
164 | 0 | return false; |
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} |
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167 | 0 | List<Object> values = new ArrayList(); |
168 | 0 | for (Object element : c) { |
169 | 0 | if (delegate.contains(element)) { |
170 | 0 | values.add(element); |
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} |
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} |
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174 | 0 | boolean success = delegate.removeAll(c); |
175 | 0 | if (success && !values.isEmpty()) { |
176 | 0 | pcs.firePropertyChange(new MultiElementRemovedEvent(this, values)); |
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} |
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179 | 0 | return success; |
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} |
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public boolean retainAll(Collection<?> c) { |
183 | 0 | if (c == null) { |
184 | 0 | return false; |
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} |
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187 | 0 | List<E> values = new ArrayList<E>(); |
188 | 0 | if (c != null) { |
189 | 0 | for (E element : delegate) { |
190 | 0 | if (!c.contains(element)) { |
191 | 0 | values.add(element); |
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} |
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} |
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} |
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196 | 0 | boolean success = delegate.retainAll(c); |
197 | 0 | if (success && !values.isEmpty()) { |
198 | 0 | pcs.firePropertyChange(new MultiElementRemovedEvent(this, values)); |
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} |
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201 | 0 | return success; |
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} |
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public E set(int index, E element) { |
205 | 0 | E oldValue = delegate.set(index, element); |
206 | 0 | pcs.firePropertyChange(new ElementUpdatedEvent(this, oldValue, element, index)); |
207 | 0 | return oldValue; |
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} |
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public int size() { |
211 | 0 | return delegate.size(); |
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} |
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public List subList(int fromIndex, int toIndex) { |
215 | 0 | return delegate.subList(fromIndex, toIndex); |
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} |
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public Object[] toArray() { |
219 | 0 | return delegate.toArray(); |
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} |
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public boolean add(E o) { |
223 | 0 | boolean success = delegate.add(o); |
224 | 0 | if (success) { |
225 | 0 | pcs.firePropertyChange(new ElementAddedEvent(this, o, size() - 1)); |
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} |
227 | 0 | return success; |
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} |
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public Object[] toArray(Object[] a) { |
232 | 0 | return delegate.toArray(a); |
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} |
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private class ObservableIterator implements Iterator<E> { |
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private Iterator<E> iterDelegate; |
238 | 0 | protected int cursor = 0; |
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240 | 0 | public ObservableIterator(Iterator<E> iterDelegate) { |
241 | 0 | this.iterDelegate = iterDelegate; |
242 | 0 | } |
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public Iterator<E> getDelegate() { |
245 | 0 | return iterDelegate; |
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} |
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public boolean hasNext() { |
249 | 0 | return iterDelegate.hasNext(); |
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} |
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public E next() { |
253 | 0 | cursor++; |
254 | 0 | return iterDelegate.next(); |
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} |
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public void remove() { |
258 | 0 | ObservableList.this.remove(cursor--); |
259 | 0 | } |
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} |
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protected class ObservableListIterator extends ObservableIterator implements ListIterator<E> { |
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264 | 0 | public ObservableListIterator(ListIterator<E> iterDelegate, int index) { |
265 | 0 | super(iterDelegate); |
266 | 0 | cursor = index; |
267 | 0 | } |
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public ListIterator<E> getListIterator() { |
270 | 0 | return (ListIterator<E>) getDelegate(); |
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} |
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public void add(E o) { |
274 | 0 | ObservableList.this.add(o); |
275 | 0 | cursor++; |
276 | 0 | } |
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public boolean hasPrevious() { |
279 | 0 | return getListIterator().hasPrevious(); |
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} |
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public int nextIndex() { |
283 | 0 | return getListIterator().nextIndex(); |
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} |
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public E previous() { |
287 | 0 | return getListIterator().previous(); |
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} |
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public int previousIndex() { |
291 | 0 | return getListIterator().previousIndex(); |
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} |
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public void set(E e) { |
295 | 0 | ObservableList.this.set(cursor, e); |
296 | 0 | } |
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} |
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public void addPropertyChangeListener(PropertyChangeListener listener) { |
303 | 0 | pcs.addPropertyChangeListener(listener); |
304 | 0 | } |
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public void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) { |
307 | 0 | pcs.addPropertyChangeListener(propertyName, listener); |
308 | 0 | } |
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public PropertyChangeListener[] getPropertyChangeListeners() { |
311 | 0 | return pcs.getPropertyChangeListeners(); |
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} |
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public PropertyChangeListener[] getPropertyChangeListeners(String propertyName) { |
315 | 0 | return pcs.getPropertyChangeListeners(propertyName); |
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} |
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public void removePropertyChangeListener(PropertyChangeListener listener) { |
319 | 0 | pcs.removePropertyChangeListener(listener); |
320 | 0 | } |
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public void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) { |
323 | 0 | pcs.removePropertyChangeListener(propertyName, listener); |
324 | 0 | } |
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public boolean hasListeners(String propertyName) { |
327 | 0 | return pcs.hasListeners(propertyName); |
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} |
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} |