org.joyqueue.network.serializer.JoyQueueMapTools Maven / Gradle / Ivy
/**
* Copyright 2019 The JoyQueue Authors.
*
* 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 org.joyqueue.network.serializer;
import io.netty.buffer.ByteBuf;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* @author dingjun
* @since 16-5-5.
*/
public class JoyQueueMapTools {
public static final Charset UTF8 = Charset.forName("UTF-8");
//public static final byte NULL_TYPE=Byte.MAX_VALUE;
public static final byte BYTE_TYPE = 1;
public static final byte SHORT_TYPE = 2;
public static final byte INT_TYPE = 4;
public static final byte LONG_TYPE = 8;
public static final byte DOUBLE_TYPE = 7;
public static final byte STRING_BYTE_TYPE = 9;
public static final byte STRING_SHORT_TYPE = 10;
public static final byte STRING_INT_TYPE = 11;
public static final byte BYTE_ARRAY_INT_TYPE = 12;
// 读取Map数据
public static Map readMap(final ByteBuf in) throws Exception {
int size = in.readInt();
byte type;
Object key;
Object value;
Map hashMap = new HashMap();
if (0 == size) {
return hashMap;
} else {
for (int i = 0; i < size; i++) {
type = in.readByte();
key = readObject(type, in);
type = in.readByte();
value = readObject(type, in);
if (key != null && value != null) {
hashMap.put(key, value);
}
}
}
return hashMap;
}
// 根据类型读取数据
public static Object readObject(byte type, ByteBuf in) {
Object value = null;
Object mRetObject;
switch (type) {
case BYTE_TYPE:
value = in.readByte();
break;
case SHORT_TYPE:
value = in.readShort();
break;
case INT_TYPE:
value = in.readInt();
break;
case LONG_TYPE:
value = in.readLong();
break;
case DOUBLE_TYPE:
value = in.readDouble();
break;
case STRING_BYTE_TYPE:
value = readByteString(in);
break;
case STRING_SHORT_TYPE:
value = readShortString(in);
break;
case STRING_INT_TYPE:
value = readIntString(in);
break;
default:
throw new RuntimeException("type is invalid:" + type);
}
mRetObject = value;
return mRetObject;
}
private static String readByteString(ByteBuf in) {
byte len = in.readByte();
return readString(in, len);
}
private static String readShortString(ByteBuf in) {
short len = in.readShort();
return readString(in, len);
}
private static String readIntString(ByteBuf in) {
int len = in.readInt();
return readString(in, len);
}
private static String readString(ByteBuf in, int len) {
if (len == 0) {
return "";
}
byte[] bytes = new byte[len];
in.readBytes(bytes);
return new String(bytes, UTF8);
}
//写入map数据
public static void write(final Map hashMap, ByteBuf out) throws Exception {
int size = hashMap.size();
out.writeInt(size);
if (0 == size) {
return;
}
Iterator iterator = hashMap.entrySet().iterator();
Map.Entry entry;
while (iterator.hasNext()) {
entry = (Map.Entry) iterator.next();
Object key = entry.getKey();
Object value = entry.getValue();
if (key != null && value != null) {
write(key, out);
write(value, out);
} else if (value == null) {
throw new RuntimeException("map value can't be null for serializing,key:" + key);
}
}
}
// 根据类型写入
public static void write(final Object object, final ByteBuf out) {
if (object instanceof Byte) {
out.writeByte(BYTE_TYPE);
out.writeByte(((Byte) object).byteValue());
} else if (object instanceof Short) {
out.writeByte(SHORT_TYPE);
out.writeShort(((Short) object).shortValue());
} else if (object instanceof Integer) {
out.writeByte(INT_TYPE);
out.writeInt(((Integer) object).intValue());
} else if (object instanceof Long) {
out.writeByte(LONG_TYPE);
out.writeLong(((Long) object).longValue());
} else if (object instanceof Double) {
out.writeByte(DOUBLE_TYPE);
out.writeDouble((Double) object);
} else if (object instanceof String) {
String str = (String) object;
byte[] bytes = str.getBytes(UTF8);
int size = bytes.length;
if (size <= Byte.MAX_VALUE) {
out.writeByte(STRING_BYTE_TYPE);
out.writeByte((byte) size);
} else if (size <= Short.MAX_VALUE) {
out.writeByte(STRING_SHORT_TYPE);
out.writeShort((short) size);
} else if (size <= Integer.MAX_VALUE) {
out.writeByte(STRING_INT_TYPE);
out.writeInt(size);
}
out.writeBytes(bytes);
} else {
throw new RuntimeException("type is illegal:" + object);
}
}
public static Byte getByte(Map map, Object key) {
Object obj = map.get(key);
if (obj == null) {
return Byte.valueOf((byte) 0);
} else {
return (Byte) obj;
}
}
public static Short getShort(Map map, Object key) {
Object obj = map.get(key);
if (obj == null) {
return Short.valueOf((short) 0);
} else {
return (Short) obj;
}
}
public static Integer getInt(Map map, Object key) {
Object obj = map.get(key);
if (obj == null) {
return Integer.valueOf(0);
} else {
return (Integer) obj;
}
}
public static Long getLong(Map map, Object key) {
Object obj = map.get(key);
if (obj == null) {
return Long.valueOf(0);
} else {
return (Long) obj;
}
}
public static String getString(Map map, Object key) {
Object obj = map.get(key);
if (obj == null) {
return null;
} else {
return (String) obj;
}
}
}