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A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.
/*
* Copyright (C) 2015 HaiYang Li
*
* 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.landawn.abacus.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.atomic.AtomicInteger;
import com.landawn.abacus.annotation.Beta;
import com.landawn.abacus.annotation.Internal;
import com.landawn.abacus.exception.UncheckedIOException;
import com.landawn.abacus.logging.Logger;
import com.landawn.abacus.logging.LoggerFactory;
/**
*
* @author Haiyang Li
* @since 0.8
*/
@Internal
@Beta
public final class Objectory {
private static final Logger logger = LoggerFactory.getLogger(Objectory.class);
private static AtomicInteger created = new AtomicInteger();
static final int KB = 1024;
static final int POOL_SIZE = 1024;
static final int POOL_SIZE_FOR_BIG_BUFFER = 64;
static final int POOLABLE_SIZE = 8192;
static final int BUFFER_SIZE = Math.min(Math.max(IOUtil.MAX_MEMORY_IN_MB, KB * 8), 64 * KB);
static final int BIG_BUFFER_SIZE = BUFFER_SIZE * 8;
private static final int POOLABLE_ARRAY_LENGTH = 128;
private static final int MAX_ARRAY_POOL_SIZE = IOUtil.IS_PLATFORM_ANDROID ? 8 : 64;
private static final int MAX_ARRAY_LENGTH = IOUtil.IS_PLATFORM_ANDROID ? 128 : 1024;
private static final Queue> listPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue> setPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue> linkedHashSetPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue> mapPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue> linkedHashMapPool = new ArrayBlockingQueue<>(POOL_SIZE);
@SuppressWarnings("unchecked")
private static final Queue[] objectArrayPool = new Queue[POOLABLE_SIZE + 1];
private static final Queue stringBuilderPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue bigStringBuilderPool = new ArrayBlockingQueue<>(POOL_SIZE_FOR_BIG_BUFFER);
private static final Queue charArrayBufferPool = new ArrayBlockingQueue<>(POOL_SIZE_FOR_BIG_BUFFER);
private static final Queue byteArrayBufferPool = new ArrayBlockingQueue<>(POOL_SIZE_FOR_BIG_BUFFER);
private static final Queue byteArrayOutputStreamPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue bufferedWriterPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue bufferedXMLWriterPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue bufferedJSONWriterPool = new ArrayBlockingQueue<>(POOL_SIZE);
private static final Queue bufferedReaderPool = new ArrayBlockingQueue<>(POOL_SIZE);
private Objectory() {
// Utility class
}
/**
* Creates the list.
*
* @param
* @return
*/
@SuppressWarnings("unchecked")
public static List createList() {
List list = (List) listPool.poll();
return (list == null) ? new ArrayList<>() : list;
}
/**
* Creates the set.
*
* @param
* @return
*/
@SuppressWarnings("unchecked")
public static Set createSet() {
Set set = (Set) setPool.poll();
return (set == null) ? N.newHashSet() : set;
}
/**
* Creates the linked hash set.
*
* @param
* @return
*/
@SuppressWarnings("unchecked")
public static Set createLinkedHashSet() {
Set set = (Set) linkedHashSetPool.poll();
return (set == null) ? N.newLinkedHashSet() : set;
}
/**
* Creates the map.
*
* @param the key type
* @param the value type
* @return
*/
@SuppressWarnings("unchecked")
public static Map createMap() {
Map map = (Map) mapPool.poll();
return (map == null) ? N.newHashMap() : map;
}
/**
* Creates the linked hash map.
*
* @param the key type
* @param the value type
* @return
*/
@SuppressWarnings("unchecked")
public static Map createLinkedHashMap() {
Map linkedHashMap = (Map) linkedHashMapPool.poll();
return (linkedHashMap == null) ? N.newLinkedHashMap() : linkedHashMap;
}
/**
* Creates the object array.
*
* @return
*/
public static Object[] createObjectArray() {
return createObjectArray(POOLABLE_ARRAY_LENGTH);
}
/**
* Creates the object array.
*
* @param size
* @return
*/
public static Object[] createObjectArray(int size) {
if (size > POOLABLE_ARRAY_LENGTH) {
return new Object[size];
}
Object[] objArray = null;
synchronized (objectArrayPool) {
Queue arrayQueue = objectArrayPool[size];
if (N.notNullOrEmpty(arrayQueue)) {
objArray = arrayQueue.poll();
}
if (objArray == null) {
// logCreated("createObjectArray");
objArray = new Object[size];
}
}
return objArray;
}
/**
* Creates the string builder.
*
* @return
*/
public static StringBuilder createStringBuilder() {
return createStringBuilder(BUFFER_SIZE);
}
/**
* Creates the string builder.
*
* @param initCapacity
* @return
*/
public static StringBuilder createStringBuilder(int initCapacity) {
if (initCapacity > BIG_BUFFER_SIZE) {
// logCreated("createStringBuilder");
return new StringBuilder(initCapacity);
}
if (initCapacity <= BUFFER_SIZE) {
StringBuilder sb = stringBuilderPool.poll();
if (sb == null) {
logCreated("createStringBuilder");
sb = new StringBuilder(BUFFER_SIZE);
}
return sb;
} else {
return createBigStringBuilder();
}
}
/**
*
*
* @return
*/
public static StringBuilder createBigStringBuilder() {
StringBuilder sb = bigStringBuilderPool.poll();
if (sb == null) {
logCreated("bigStringBuilderPool");
sb = new StringBuilder(BIG_BUFFER_SIZE);
}
return sb;
}
/**
* Creates the char array buffer.
*
* @return
*/
public static char[] createCharArrayBuffer() {
return createCharArrayBuffer(BIG_BUFFER_SIZE);
}
/**
* Creates the char array buffer.
*
* @param capacity
* @return
*/
public static char[] createCharArrayBuffer(int capacity) {
if (capacity > BIG_BUFFER_SIZE) {
// logCreated("createCharArrayBuffer");
return new char[capacity];
}
char[] cbuf = charArrayBufferPool.poll();
if (cbuf == null) {
logCreated("createCharArrayBuffer");
cbuf = new char[BIG_BUFFER_SIZE];
}
return cbuf;
}
/**
* Creates the byte array buffer.
*
* @return
*/
public static byte[] createByteArrayBuffer() {
return createByteArrayBuffer(BIG_BUFFER_SIZE);
}
/**
* Creates the byte array buffer.
*
* @param capacity
* @return
*/
public static byte[] createByteArrayBuffer(int capacity) {
if (capacity > BIG_BUFFER_SIZE) {
// logCreated("createByteArrayBuffer");
return new byte[capacity];
}
byte[] bbuf = byteArrayBufferPool.poll();
if (bbuf == null) {
logCreated("createByteArrayBuffer");
bbuf = new byte[BIG_BUFFER_SIZE];
}
return bbuf;
}
/**
* Creates the byte array output stream.
*
* @return
*/
public static ByteArrayOutputStream createByteArrayOutputStream() {
return createByteArrayOutputStream(BUFFER_SIZE);
}
/**
* Creates the byte array output stream.
*
* @param initCapacity
* @return
*/
public static ByteArrayOutputStream createByteArrayOutputStream(int initCapacity) {
if (initCapacity > BUFFER_SIZE) {
// logCreated("createByteArrayOutputStream");
return new ByteArrayOutputStream(initCapacity);
}
ByteArrayOutputStream os = byteArrayOutputStreamPool.poll();
if (os == null) {
logCreated("createByteArrayOutputStream");
os = new ByteArrayOutputStream(BUFFER_SIZE);
}
return os;
}
/**
* Creates the buffered writer.
*
* @return
*/
public static BufferedWriter createBufferedWriter() {
BufferedWriter bw = bufferedWriterPool.poll();
if (bw == null) {
logCreated("createBufferedWriter"); //NOSONAR
bw = new BufferedWriter();
} else {
bw.reinit();
}
return bw;
}
/**
* Creates the buffered writer.
*
* @param os
* @return
*/
public static BufferedWriter createBufferedWriter(OutputStream os) {
BufferedWriter bw = bufferedWriterPool.poll();
if (bw == null) {
logCreated("createBufferedWriter");
bw = new BufferedWriter(os);
} else {
bw.reinit(os);
}
return bw;
}
/**
* Creates the buffered writer.
*
* @param writer
* @return
*/
public static BufferedWriter createBufferedWriter(Writer writer) {
BufferedWriter bw = bufferedWriterPool.poll();
if (bw == null) {
logCreated("createBufferedWriter");
bw = new BufferedWriter(writer);
} else {
bw.reinit(writer);
}
return bw;
}
/**
* Creates the buffered XML writer.
*
* @return
*/
public static BufferedXMLWriter createBufferedXMLWriter() {
BufferedXMLWriter bw = bufferedXMLWriterPool.poll();
if (bw == null) {
logCreated("createBufferedXMLWriter"); //NOSONAR
bw = new BufferedXMLWriter();
} else {
bw.reinit();
}
return bw;
}
/**
* Creates the buffered XML writer.
*
* @param os
* @return
*/
public static BufferedXMLWriter createBufferedXMLWriter(OutputStream os) {
BufferedXMLWriter bw = bufferedXMLWriterPool.poll();
if (bw == null) {
logCreated("createBufferedXMLWriter");
bw = new BufferedXMLWriter(os);
} else {
bw.reinit(os);
}
return bw;
}
/**
* Creates the buffered XML writer.
*
* @param writer
* @return
*/
public static BufferedXMLWriter createBufferedXMLWriter(Writer writer) {
BufferedXMLWriter bw = bufferedXMLWriterPool.poll();
if (bw == null) {
logCreated("createBufferedXMLWriter");
bw = new BufferedXMLWriter(writer);
} else {
bw.reinit(writer);
}
return bw;
}
/**
* Creates the buffered JSON writer.
*
* @return
*/
public static BufferedJSONWriter createBufferedJSONWriter() {
BufferedJSONWriter bw = bufferedJSONWriterPool.poll();
if (bw == null) {
logCreated("createBufferedJSONWriter"); //NOSONAR
bw = new BufferedJSONWriter();
} else {
bw.reinit();
}
return bw;
}
/**
* Creates the buffered JSON writer.
*
* @param os
* @return
*/
public static BufferedJSONWriter createBufferedJSONWriter(OutputStream os) {
BufferedJSONWriter bw = bufferedJSONWriterPool.poll();
if (bw == null) {
logCreated("createBufferedJSONWriter");
bw = new BufferedJSONWriter(os);
} else {
bw.reinit(os);
}
return bw;
}
/**
* Creates the buffered JSON writer.
*
* @param writer
* @return
*/
public static BufferedJSONWriter createBufferedJSONWriter(Writer writer) {
BufferedJSONWriter bw = bufferedJSONWriterPool.poll();
if (bw == null) {
logCreated("createBufferedJSONWriter");
bw = new BufferedJSONWriter(writer);
} else {
bw.reinit(writer);
}
return bw;
}
/**
* Creates the buffered reader.
*
* @param st
* @return
*/
public static BufferedReader createBufferedReader(String st) {
BufferedReader br = bufferedReaderPool.poll();
if (br == null) {
logCreated("createBufferedReader"); //NOSONAR
return new BufferedReader(st);
} else {
br.reinit(st);
return br;
}
}
/**
* Creates the buffered reader.
*
* @param is
* @return
*/
public static BufferedReader createBufferedReader(InputStream is) {
BufferedReader br = bufferedReaderPool.poll();
if (br == null) {
logCreated("createBufferedReader");
return new BufferedReader(is);
} else {
br.reinit(is);
return br;
}
}
/**
* Creates the buffered reader.
*
* @param reader
* @return
*/
public static BufferedReader createBufferedReader(Reader reader) {
BufferedReader br = bufferedReaderPool.poll();
if (br == null) {
logCreated("createBufferedReader");
return new BufferedReader(reader);
} else {
br.reinit(reader);
return br;
}
}
/**
*
* @param methodName
*/
private static void logCreated(String methodName) {
if (logger.isWarnEnabled() && (created.incrementAndGet() % 1000) == 0) {
logger.warn("The " + created.get() + "th cachable object is created by " + methodName,
new RuntimeException("No error. It's only for debug to print stack trace:"));
}
}
/**
*
* @param list
*/
public static void recycle(List list) {
if ((list == null) || (list.size() > POOLABLE_SIZE)) {
return;
}
if (listPool.size() < POOL_SIZE) {
list.clear();
listPool.offer(list);
}
}
/**
*
* @param set
*/
public static void recycle(Set set) {
if ((set == null) || (set.size() > POOLABLE_SIZE)) {
return;
}
if (set instanceof LinkedHashSet) {
if (linkedHashSetPool.size() < POOL_SIZE) {
set.clear();
linkedHashSetPool.offer(set);
}
} else {
if (setPool.size() < POOL_SIZE) {
set.clear();
setPool.offer(set);
}
}
}
/**
*
* @param map
*/
public static void recycle(Map map) {
if ((map == null) || (map.size() > POOLABLE_SIZE)) {
return;
}
if (map instanceof LinkedHashMap) {
if (linkedHashMapPool.size() < POOL_SIZE) {
map.clear();
linkedHashMapPool.offer(map);
}
} else {
if (mapPool.size() < POOL_SIZE) {
map.clear();
mapPool.offer(map);
}
}
}
/**
*
* @param objArray
*/
public static void recycle(Object[] objArray) {
if ((objArray == null) || (objArray.length > POOLABLE_ARRAY_LENGTH)) {
return;
}
final int poolSize = N.min(MAX_ARRAY_POOL_SIZE, MAX_ARRAY_LENGTH / objArray.length);
Queue arrayQueue = objectArrayPool[objArray.length];
if (arrayQueue == null) {
arrayQueue = new ArrayBlockingQueue<>(poolSize);
objectArrayPool[objArray.length] = arrayQueue;
}
if (arrayQueue.size() < poolSize) {
Arrays.fill(objArray, null);
arrayQueue.offer(objArray);
}
}
/**
*
* @param sb
*/
public static void recycle(StringBuilder sb) {
if ((sb == null) || (sb.capacity() > BIG_BUFFER_SIZE)) {
return;
}
if (sb.capacity() <= BUFFER_SIZE) {
if (stringBuilderPool.size() < POOL_SIZE) {
sb.setLength(0);
stringBuilderPool.offer(sb);
}
} else {
if (bigStringBuilderPool.size() < POOL_SIZE_FOR_BIG_BUFFER) {
sb.setLength(0);
bigStringBuilderPool.offer(sb);
}
}
}
/**
*
* @param cbuf
*/
public static void recycle(char[] cbuf) {
if ((cbuf == null) || (cbuf.length > BIG_BUFFER_SIZE)) {
return;
}
charArrayBufferPool.offer(cbuf);
}
/**
*
* @param bbuf
*/
public static void recycle(byte[] bbuf) {
if ((bbuf == null) || (bbuf.length > BIG_BUFFER_SIZE)) {
return;
}
byteArrayBufferPool.offer(bbuf);
}
/**
*
* @param os
*/
public static void recycle(ByteArrayOutputStream os) {
if ((os == null) || (os.capacity() > BUFFER_SIZE)) {
return;
}
if (byteArrayOutputStreamPool.size() < POOL_SIZE) {
os.reset();
byteArrayOutputStreamPool.offer(os);
}
}
/**
*
* @param bw
*/
public static void recycle(BufferedWriter bw) {
if (bw == null) {
return;
}
try {
bw.flushBuffer();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
bw._reset();
bufferedWriterPool.offer(bw);
}
/**
*
* @param bw
*/
public static void recycle(BufferedXMLWriter bw) {
if (bw == null) {
return;
}
try {
bw.flushBuffer();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
bw._reset();
bufferedXMLWriterPool.offer(bw);
}
/**
*
* @param bw
*/
public static void recycle(BufferedJSONWriter bw) {
if (bw == null) {
return;
}
try {
bw.flushBuffer();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
bw._reset();
bufferedJSONWriterPool.offer(bw);
}
/**
*
* @param br
*/
public static void recycle(BufferedReader br) {
if (br == null) {
return;
}
br._reset();
bufferedReaderPool.offer(br);
}
}