1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.db.impl.query;
14 import java.lang.reflect.Array;
15 import java.util.ArrayList;
20 * An implementation of the Map interface which uses an open addressed
21 * hash table to store its contents.
23 * Created: Sun Nov 4 08:52:45 2001
25 * @author Eric D. Friedman
26 * @version $Id: BinaryQueryHashMap.java,v 1.2 2008/03/14 11:38:53 tuoksk Exp $
28 public class UnaryQueryHashMap<Procedure> extends UnaryQueryHash<Procedure> {
31 * Creates a new <code>THashMap</code> instance with the default
32 * capacity and load factor.
34 public UnaryQueryHashMap() {
39 * initialize the value array of the map.
41 * @param initialCapacity an <code>int</code> value
42 * @return an <code>int</code> value
44 protected int setUp(int initialCapacity) {
47 capacity = super.setUp(initialCapacity);
48 // _values = (Object[]) new Object[capacity];
53 * Inserts a key/value pair into the map.
55 * @param key an <code>Object</code> value
56 * @param value an <code>Object</code> value
57 * @return the previous value associated with <tt>key</tt>,
58 * or null if none was found.
60 @SuppressWarnings("unchecked")
61 public UnaryQuery put(final int id, final UnaryQuery value) {
62 UnaryQuery previous = null;
64 int index = insertionIndex(id);
65 boolean isNewMapping = true;
68 previous = _set[index];
74 postInsertHook(oldKey == null);
81 * rehashes the map to the new capacity.
83 * @param newCapacity an <code>int</code> value
85 protected void rehash(int newCapacity) {
87 int oldCapacity = _set.length;
88 UnaryQuery<Procedure> oldKeys[] = _set;
90 UnaryQuery<Procedure> newKeys[] = (UnaryQuery<Procedure>[])Array.newInstance(UnaryQuery.class, newCapacity);
92 for (int i = oldCapacity; i-- > 0;) {
93 if(oldKeys[i] != null && oldKeys[i] != REMOVED) {
94 UnaryQuery<Procedure> o = oldKeys[i];
95 int index = insertionIndex2(o.id, newKeys);
97 throwObjectContractViolation(newKeys[(-index -1)], o);
108 * retrieves the value for <tt>key</tt>
110 * @param key an <code>Object</code> value
111 * @return the value of <tt>key</tt> or null if no such mapping exists.
113 final public UnaryQuery<Procedure> get(final int id) {
114 // int index = index(id);
115 // return index < 0 ? null : _set[index];
120 * Deletes a key/value pair from the map.
122 * @param key an <code>Object</code> value
123 * @return an <code>Object</code> value
125 public Object remove(final int id) {
127 int index = index(id);
130 removeAt(index); // clear key,state; adjust size
135 final public void values(int level, CacheCollectionResult result) {
137 for (int i = _set.length; i-- > 0;) {
138 CacheEntryBase entry = _set[i];
139 if(entry != null && entry != REMOVED) {
140 if(entry.getLevel() <= level)
147 final public ArrayList<CacheEntry> values() {
149 ArrayList<CacheEntry> result = new ArrayList<CacheEntry>();
151 for (int i = _set.length; i-- > 0;) {
152 if(_set[i] != null && _set[i] != REMOVED) {