/* Copyright (c) 2001-2016, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb.lib;
import java.util.concurrent.locks.
Lock;
import java.util.concurrent.locks.
ReentrantReadWriteLock;
import org.hsqldb.map.
BaseHashMap;
/**
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class
IntKeyHashMapConcurrent extends
BaseHashMap {
Set keySet;
Collection values;
//
ReentrantReadWriteLock lock = new
ReentrantReadWriteLock(true);
ReentrantReadWriteLock.
ReadLock readLock =
lock.
readLock();
ReentrantReadWriteLock.
WriteLock writeLock =
lock.
writeLock();
public
IntKeyHashMapConcurrent() {
this(8);
}
public
IntKeyHashMapConcurrent(int
initialCapacity)
throws
IllegalArgumentException {
super(
initialCapacity,
BaseHashMap.
intKeyOrValue,
BaseHashMap.
objectKeyOrValue, false);
}
public
Lock getWriteLock() {
return
writeLock;
}
public
Object get(int
key) {
try {
readLock.
lock();
int
lookup =
getLookup(
key);
if (
lookup != -1) {
return
objectValueTable[
lookup];
}
return null;
} finally {
readLock.
unlock();
}
}
public
Object put(int
key,
Object value) {
try {
writeLock.
lock();
return super.addOrRemove(
key, 0, null,
value, false);
} finally {
writeLock.
unlock();
}
}
public boolean
containsValue(
Object value) {
try {
readLock.
lock();
return super.containsValue(
value);
} finally {
readLock.
unlock();
}
}
public
Object remove(int
key) {
try {
writeLock.
lock();
return super.addOrRemove(
key, 0, null, null, true);
} finally {
writeLock.
unlock();
}
}
public boolean
containsKey(int
key) {
try {
readLock.
lock();
return super.containsKey(
key);
} finally {
readLock.
unlock();
}
}
public int
getOrderedMatchCount(int[]
array) {
int
i = 0;
try {
readLock.
lock();
for (;
i <
array.length;
i++) {
if (!super.containsKey(
array[
i])) {
break;
}
}
return
i;
} finally {
readLock.
unlock();
}
}
public
Set keySet() {
if (
keySet == null) {
keySet = new
KeySet();
}
return
keySet;
}
public
Collection values() {
if (
values == null) {
values = new
Values();
}
return
values;
}
class
KeySet implements
Set {
public
Iterator iterator() {
return
IntKeyHashMapConcurrent.this.new
BaseHashIterator(true);
}
public int
size() {
return
IntKeyHashMapConcurrent.this.
size();
}
public boolean
contains(
Object o) {
throw new
UnsupportedOperationException();
}
public
Object get(
Object key) {
throw new
UnsupportedOperationException();
}
public boolean
add(
Object value) {
throw new
UnsupportedOperationException();
}
public boolean
addAll(
Collection c) {
throw new
UnsupportedOperationException();
}
public boolean
remove(
Object o) {
throw new
UnsupportedOperationException();
}
public boolean
isEmpty() {
return
size() == 0;
}
public void
clear() {
IntKeyHashMapConcurrent.this.
clear();
}
}
class
Values implements
Collection {
public
Iterator iterator() {
return
IntKeyHashMapConcurrent.this.new
BaseHashIterator(false);
}
public int
size() {
return
IntKeyHashMapConcurrent.this.
size();
}
public boolean
contains(
Object o) {
throw new
UnsupportedOperationException();
}
public boolean
add(
Object value) {
throw new
UnsupportedOperationException();
}
public boolean
addAll(
Collection c) {
throw new
UnsupportedOperationException();
}
public boolean
remove(
Object o) {
throw new
UnsupportedOperationException();
}
public boolean
isEmpty() {
return
size() == 0;
}
public void
clear() {
IntKeyHashMapConcurrent.this.
clear();
}
}
}