-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-\r
-package org.simantics.utils.datastructures.prioritystack;\r
-\r
-import java.lang.reflect.Array;\r
-import java.lang.reflect.Method;\r
-import java.util.ArrayList;\r
-import java.util.HashMap;\r
-import java.util.LinkedList;\r
-import java.util.List;\r
-import java.util.ListIterator;\r
-import java.util.Map;\r
-\r
-import org.simantics.utils.strings.EString;\r
-import org.simantics.utils.threads.IThreadWorkQueue;\r
-import org.simantics.utils.threads.SyncListenerList;\r
-\r
-\r
-/**\r
- * Implementation to IPriorityStack.\r
- * \r
- * <p>\r
- * Note!\r
- * getAllItems() is optimized for result with the penalty of slower add/remove methods. \r
- *\r
- * @author Toni Kalajainen\r
- * @param <E>\r
- */\r
-public class PriorityStack<E> implements IPriorityStack<E> {\r
- \r
- @SuppressWarnings({ "rawtypes" })\r
- private SyncListenerList<IPriorityStackListener> listeners =\r
- new SyncListenerList<IPriorityStackListener>(IPriorityStackListener.class);\r
- \r
- private LinkedList<E> list = \r
- new LinkedList<E>(); \r
- \r
- private E[] snapshotArray;\r
- \r
- private Map<E, Integer> priorities = \r
- new HashMap<E, Integer>(); \r
- \r
- final Class<E> clazz;\r
- \r
- public PriorityStack(Class<E> clazz) {\r
- this.clazz = clazz;\r
- snapshotArray = createArray(0);\r
- }\r
- \r
- @Override\r
- public void add(E interactor, int priority) {\r
- abu:\r
- synchronized(this) {\r
- if (list.contains(interactor))\r
- throw new IllegalArgumentException("InteractorStack already contains item "+interactor);\r
- \r
- priorities.put(interactor, priority);\r
- \r
- if (list.size()==0)\r
- {\r
- list.add(interactor);\r
- snapshotArray = createSnapshot(list);\r
- break abu;\r
- }\r
- \r
- ListIterator<E> li = list.listIterator();\r
- while (li.hasNext()) {\r
- E i = li.next();\r
- double w = priorities.get( i );\r
- if (w > priority) {\r
- li.previous();\r
- li.add(interactor);\r
- snapshotArray = createSnapshot(list);\r
- break abu;\r
- }\r
- }\r
- list.addLast(interactor);\r
- snapshotArray = createSnapshot(list);\r
- }\r
- fireInteractorAdded(interactor); \r
- }\r
- \r
- @Override\r
- public boolean remove(E interactor) {\r
- synchronized(this) {\r
- if (!priorities.containsKey(interactor)) \r
- return false;\r
- priorities.remove(interactor);\r
- list.remove(interactor);\r
- snapshotArray = createSnapshot(list);\r
- }\r
- fireInteractorRemoved(interactor);\r
- return true;\r
- } \r
-\r
- @Override\r
- public synchronized Integer getPriority(E interactor) {\r
- return priorities.get(interactor);\r
- } \r
-\r
- @SuppressWarnings({ "unchecked" })\r
- private E[] createArray(int length)\r
- {\r
- return (E[]) Array.newInstance(clazz, length);\r
- }\r
-\r
- E[] createSnapshot(List<E> list) {\r
- E[] result = createArray(list.size());\r
- int index = 0;\r
- for (E i : list)\r
- result[index++] = i; \r
- return result;\r
- }\r
- \r
- public synchronized int indexOf(E item)\r
- {\r
- for (int i=0; i<snapshotArray.length; i++)\r
- if (snapshotArray[i]==item)\r
- return i;\r
- return -1;\r
- } \r
- \r
- @Override\r
- public synchronized E[] toArray() {\r
- return snapshotArray;\r
- }\r
-\r
- public synchronized <R extends E> R getSingleItem(Class<R> clazz)\r
- {\r
- R array[] = getItemsByClass(clazz);\r
- if (array.length!=1)\r
- throw new RuntimeException("one "+clazz.getName()+" expected in PriorityStack, got "+array.length);\r
- return (R) array[0];\r
- }\r
- \r
- @SuppressWarnings("unchecked")\r
- @Override\r
- public synchronized <R extends E> R[] getItemsByClass(Class<R> clazz)\r
- {\r
- List<E> result = new ArrayList<E>(list.size());\r
- for (E i : list)\r
- if (clazz.isAssignableFrom(i.getClass()))\r
- result.add(i);\r
- return (R[])result.toArray(createArray(result.size()));\r
- }\r
-\r
- private static Method itemAdded = SyncListenerList.getMethod(IPriorityStackListener.class, "itemAdded");\r
- private void fireInteractorAdded(E interactor)\r
- {\r
- listeners.fireEventSync(itemAdded, this, interactor);\r
- }\r
- \r
- private static Method itemRemoved = SyncListenerList.getMethod(IPriorityStackListener.class, "itemRemoved");\r
- private void fireInteractorRemoved(E interactor)\r
- {\r
- listeners.fireEventSync(itemRemoved, this, interactor);\r
- }\r
-\r
- @Override\r
- public synchronized void addStackListener(IPriorityStackListener<E> listener) {\r
- listeners.add(listener);\r
- }\r
-\r
- @Override\r
- public synchronized void removeStackListener(IPriorityStackListener<E> listener) {\r
- listeners.remove(listener);\r
- }\r
-\r
- @Override\r
- public synchronized boolean contains(E interactor) {\r
- return list.contains(interactor);\r
- }\r
-\r
- @Override\r
- public void addStackListener(IThreadWorkQueue thread,\r
- IPriorityStackListener<E> listener) {\r
- listeners.add(thread, listener);\r
- }\r
-\r
- @Override\r
- public void removeStackListener(IThreadWorkQueue thread,\r
- IPriorityStackListener<E> listener) {\r
- listeners.remove(thread, listener);\r
- }\r
-\r
- @Override\r
- public String toString() {\r
- return EString.implode(snapshotArray, "\n");\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+
+package org.simantics.utils.datastructures.prioritystack;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Map;
+
+import org.simantics.utils.strings.EString;
+import org.simantics.utils.threads.IThreadWorkQueue;
+import org.simantics.utils.threads.SyncListenerList;
+
+
+/**
+ * Implementation to IPriorityStack.
+ *
+ * <p>
+ * Note!
+ * getAllItems() is optimized for result with the penalty of slower add/remove methods.
+ *
+ * @author Toni Kalajainen
+ * @param <E>
+ */
+public class PriorityStack<E> implements IPriorityStack<E> {
+
+ @SuppressWarnings({ "rawtypes" })
+ private SyncListenerList<IPriorityStackListener> listeners =
+ new SyncListenerList<IPriorityStackListener>(IPriorityStackListener.class);
+
+ private LinkedList<E> list =
+ new LinkedList<E>();
+
+ private E[] snapshotArray;
+
+ private Map<E, Integer> priorities =
+ new HashMap<E, Integer>();
+
+ final Class<E> clazz;
+
+ public PriorityStack(Class<E> clazz) {
+ this.clazz = clazz;
+ snapshotArray = createArray(0);
+ }
+
+ @Override
+ public void add(E interactor, int priority) {
+ abu:
+ synchronized(this) {
+ if (list.contains(interactor))
+ throw new IllegalArgumentException("InteractorStack already contains item "+interactor);
+
+ priorities.put(interactor, priority);
+
+ if (list.size()==0)
+ {
+ list.add(interactor);
+ snapshotArray = createSnapshot(list);
+ break abu;
+ }
+
+ ListIterator<E> li = list.listIterator();
+ while (li.hasNext()) {
+ E i = li.next();
+ double w = priorities.get( i );
+ if (w > priority) {
+ li.previous();
+ li.add(interactor);
+ snapshotArray = createSnapshot(list);
+ break abu;
+ }
+ }
+ list.addLast(interactor);
+ snapshotArray = createSnapshot(list);
+ }
+ fireInteractorAdded(interactor);
+ }
+
+ @Override
+ public boolean remove(E interactor) {
+ synchronized(this) {
+ if (!priorities.containsKey(interactor))
+ return false;
+ priorities.remove(interactor);
+ list.remove(interactor);
+ snapshotArray = createSnapshot(list);
+ }
+ fireInteractorRemoved(interactor);
+ return true;
+ }
+
+ @Override
+ public synchronized Integer getPriority(E interactor) {
+ return priorities.get(interactor);
+ }
+
+ @SuppressWarnings({ "unchecked" })
+ private E[] createArray(int length)
+ {
+ return (E[]) Array.newInstance(clazz, length);
+ }
+
+ E[] createSnapshot(List<E> list) {
+ E[] result = createArray(list.size());
+ int index = 0;
+ for (E i : list)
+ result[index++] = i;
+ return result;
+ }
+
+ public synchronized int indexOf(E item)
+ {
+ for (int i=0; i<snapshotArray.length; i++)
+ if (snapshotArray[i]==item)
+ return i;
+ return -1;
+ }
+
+ @Override
+ public synchronized E[] toArray() {
+ return snapshotArray;
+ }
+
+ public synchronized <R extends E> R getSingleItem(Class<R> clazz)
+ {
+ R array[] = getItemsByClass(clazz);
+ if (array.length!=1)
+ throw new RuntimeException("one "+clazz.getName()+" expected in PriorityStack, got "+array.length);
+ return (R) array[0];
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public synchronized <R extends E> R[] getItemsByClass(Class<R> clazz)
+ {
+ List<E> result = new ArrayList<E>(list.size());
+ for (E i : list)
+ if (clazz.isAssignableFrom(i.getClass()))
+ result.add(i);
+ return (R[])result.toArray(createArray(result.size()));
+ }
+
+ private static Method itemAdded = SyncListenerList.getMethod(IPriorityStackListener.class, "itemAdded");
+ private void fireInteractorAdded(E interactor)
+ {
+ listeners.fireEventSync(itemAdded, this, interactor);
+ }
+
+ private static Method itemRemoved = SyncListenerList.getMethod(IPriorityStackListener.class, "itemRemoved");
+ private void fireInteractorRemoved(E interactor)
+ {
+ listeners.fireEventSync(itemRemoved, this, interactor);
+ }
+
+ @Override
+ public synchronized void addStackListener(IPriorityStackListener<E> listener) {
+ listeners.add(listener);
+ }
+
+ @Override
+ public synchronized void removeStackListener(IPriorityStackListener<E> listener) {
+ listeners.remove(listener);
+ }
+
+ @Override
+ public synchronized boolean contains(E interactor) {
+ return list.contains(interactor);
+ }
+
+ @Override
+ public void addStackListener(IThreadWorkQueue thread,
+ IPriorityStackListener<E> listener) {
+ listeners.add(thread, listener);
+ }
+
+ @Override
+ public void removeStackListener(IThreadWorkQueue thread,
+ IPriorityStackListener<E> listener) {
+ listeners.remove(thread, listener);
+ }
+
+ @Override
+ public String toString() {
+ return EString.implode(snapshotArray, "\n");
+ }
+
+}
Code Review / simantics / platform.git / blobdiff