57 lines
1.9 KiB
Java
57 lines
1.9 KiB
Java
|
/*
|
||
|
* Copyright (C) 2011 The Android Open Source Project
|
||
|
*
|
||
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
|
||
|
* use this file except in compliance with the License. You may obtain a copy of
|
||
|
* the License at
|
||
|
*
|
||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
*
|
||
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||
|
* License for the specific language governing permissions and limitations under
|
||
|
* the License.
|
||
|
*/
|
||
|
|
||
|
package com.android.inputmethod.latin;
|
||
|
|
||
|
import java.util.ArrayList;
|
||
|
import java.util.Collections;
|
||
|
import java.util.List;
|
||
|
|
||
|
/**
|
||
|
* A pool of string builders to be used from anywhere.
|
||
|
*/
|
||
|
public class StringBuilderPool {
|
||
|
// Singleton
|
||
|
private static final StringBuilderPool sInstance = new StringBuilderPool();
|
||
|
private StringBuilderPool() {}
|
||
|
// TODO: Make this a normal array with a size of 20
|
||
|
private final List<StringBuilder> mPool =
|
||
|
Collections.synchronizedList(new ArrayList<StringBuilder>());
|
||
|
|
||
|
public static StringBuilder getStringBuilder(final int initialSize) {
|
||
|
final int poolSize = sInstance.mPool.size();
|
||
|
final StringBuilder sb = poolSize > 0 ? (StringBuilder) sInstance.mPool.remove(poolSize - 1)
|
||
|
: new StringBuilder(initialSize);
|
||
|
sb.setLength(0);
|
||
|
return sb;
|
||
|
}
|
||
|
|
||
|
public static void recycle(final StringBuilder garbage) {
|
||
|
sInstance.mPool.add(garbage);
|
||
|
}
|
||
|
|
||
|
public static void ensureCapacity(final int capacity, final int initialSize) {
|
||
|
for (int i = sInstance.mPool.size(); i < capacity; ++i) {
|
||
|
final StringBuilder sb = new StringBuilder(initialSize);
|
||
|
sInstance.mPool.add(sb);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
public static int getSize() {
|
||
|
return sInstance.mPool.size();
|
||
|
}
|
||
|
}
|