/**
* Copyright (C) 2012 10gen Inc.
*
* 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.massivecraft.mcore.xlib.mongodb.util;
import com.massivecraft.mcore.xlib.bson.types.*;
import com.massivecraft.mcore.xlib.mongodb.BasicDBObject;
import com.massivecraft.mcore.xlib.mongodb.Bytes;
import com.massivecraft.mcore.xlib.mongodb.DBObject;
import com.massivecraft.mcore.xlib.mongodb.DBRefBase;
import java.lang.reflect.Array;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.Map.Entry;
import java.util.regex.Pattern;
/**
* Defines static methods for getting <code>ObjectSerializer</code> instances that produce various flavors of
* JSON.
*/
public class JSONSerializers {
private JSONSerializers() {
}
/**
* Returns an <code>ObjectSerializer</code> that mostly conforms to the strict JSON format defined in
* <a href="http://www.mongodb.org/display/DOCS/Mongo+Extended+JSON", but with a few differences to keep
* compatibility with previous versions of the driver. Clients should generally prefer
* <code>getStrict</code> in preference to this method.
*
* @return object serializer
* @see #getStrict()
*/
public static ObjectSerializer getLegacy() {
ClassMapBasedObjectSerializer serializer = addCommonSerializers();
serializer.addObjectSerializer(Date.class, new LegacyDateSerializer(serializer));
serializer.addObjectSerializer(BSONTimestamp.class, new LegacyBSONTimestampSerializer(serializer));
serializer.addObjectSerializer(Binary.class, new LegacyBinarySerializer());
serializer.addObjectSerializer(byte[].class, new LegacyBinarySerializer());
return serializer;
}
/**
* Returns an <code>ObjectSerializer</code> that conforms to the strict JSON format defined in
* <a href="http://www.mongodb.org/display/DOCS/Mongo+Extended+JSON".
*
* @return object serializer
*/
public static ObjectSerializer getStrict() {
ClassMapBasedObjectSerializer serializer = addCommonSerializers();
serializer.addObjectSerializer(Date.class, new DateSerializer(serializer));
serializer.addObjectSerializer(BSONTimestamp.class, new BSONTimestampSerializer(serializer));
serializer.addObjectSerializer(Binary.class, new BinarySerializer(serializer));
serializer.addObjectSerializer(byte[].class, new ByteArraySerializer(serializer));
return serializer;
}
static ClassMapBasedObjectSerializer addCommonSerializers() {
ClassMapBasedObjectSerializer serializer = new ClassMapBasedObjectSerializer();
serializer.addObjectSerializer(Object[].class, new ObjectArraySerializer(serializer));
serializer.addObjectSerializer(Boolean.class, new ToStringSerializer());
serializer.addObjectSerializer(Code.class, new CodeSerializer(serializer));
serializer.addObjectSerializer(CodeWScope.class, new CodeWScopeSerializer(serializer));
serializer.addObjectSerializer(DBObject.class, new DBObjectSerializer(serializer));
serializer.addObjectSerializer(DBRefBase.class, new DBRefBaseSerializer(serializer));
serializer.addObjectSerializer(Iterable.class, new IterableSerializer(serializer));
serializer.addObjectSerializer(Map.class, new MapSerializer(serializer));
serializer.addObjectSerializer(MaxKey.class, new MaxKeySerializer(serializer));
serializer.addObjectSerializer(MinKey.class, new MinKeySerializer(serializer));
serializer.addObjectSerializer(Number.class, new ToStringSerializer());
serializer.addObjectSerializer(ObjectId.class, new ObjectIdSerializer(serializer));
serializer.addObjectSerializer(Pattern.class, new PatternSerializer(serializer));
serializer.addObjectSerializer(String.class, new StringSerializer());
serializer.addObjectSerializer(UUID.class, new UUIDSerializer(serializer));
return serializer;
}
private abstract static class CompoundObjectSerializer extends AbstractObjectSerializer {
protected final ObjectSerializer serializer;
CompoundObjectSerializer(ObjectSerializer serializer) {
this.serializer = serializer;
}
}
private static class LegacyBinarySerializer extends AbstractObjectSerializer {
@Override
public void serialize(Object obj, StringBuilder buf) {
buf.append("<Binary Data>");
}
}
private static class ObjectArraySerializer extends CompoundObjectSerializer {
ObjectArraySerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
buf.append("[ ");
for (int i = 0; i < Array.getLength(obj); i++) {
if (i > 0)
buf.append(" , ");
serializer.serialize(Array.get(obj, i), buf);
}
buf.append("]");
}
}
private static class ToStringSerializer extends AbstractObjectSerializer {
@Override
public void serialize(Object obj, StringBuilder buf) {
buf.append(obj.toString());
}
}
private static class LegacyBSONTimestampSerializer extends CompoundObjectSerializer {
LegacyBSONTimestampSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
BSONTimestamp t = (BSONTimestamp) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("$ts", Integer.valueOf(t.getTime()));
temp.put("$inc", Integer.valueOf(t.getInc()));
serializer.serialize(temp, buf);
}
}
private static class CodeSerializer extends CompoundObjectSerializer {
CodeSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
Code c = (Code) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("$code", c.getCode());
serializer.serialize(temp, buf);
}
}
private static class CodeWScopeSerializer extends CompoundObjectSerializer {
CodeWScopeSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
CodeWScope c = (CodeWScope) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("$code", c.getCode());
temp.put("$scope", c.getScope());
serializer.serialize(temp, buf);
}
}
private static class LegacyDateSerializer extends CompoundObjectSerializer {
LegacyDateSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
Date d = (Date) obj;
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
format.setCalendar(new GregorianCalendar(
new SimpleTimeZone(0, "GMT")));
serializer.serialize(
new BasicDBObject("$date", format.format(d)),
buf);
}
}
private static class DBObjectSerializer extends CompoundObjectSerializer {
DBObjectSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
boolean first = true;
buf.append("{ ");
DBObject dbo = (DBObject) obj;
String name;
for (final String s : dbo.keySet()) {
name = s;
if (first)
first = false;
else
buf.append(" , ");
JSON.string(buf, name);
buf.append(" : ");
serializer.serialize(dbo.get(name), buf);
}
buf.append("}");
}
}
private static class DBRefBaseSerializer extends CompoundObjectSerializer {
DBRefBaseSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
DBRefBase ref = (DBRefBase) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("$ref", ref.getRef());
temp.put("$id", ref.getId());
serializer.serialize(temp, buf);
}
}
private static class IterableSerializer extends CompoundObjectSerializer {
IterableSerializer(ObjectSerializer serializer) {
super(serializer);
}
@SuppressWarnings("rawtypes")
@Override
public void serialize(Object obj, StringBuilder buf) {
boolean first = true;
buf.append("[ ");
for (final Object o : ((Iterable) obj)) {
if (first)
first = false;
else
buf.append(" , ");
serializer.serialize(o, buf);
}
buf.append("]");
}
}
private static class MapSerializer extends CompoundObjectSerializer {
MapSerializer(ObjectSerializer serializer) {
super(serializer);
}
@SuppressWarnings("rawtypes")
@Override
public void serialize(Object obj, StringBuilder buf) {
boolean first = true;
buf.append("{ ");
Map m = (Map) obj;
Entry entry;
for (final Object o : m.entrySet()) {
entry = (Entry) o;
if (first)
first = false;
else
buf.append(" , ");
JSON.string(buf, entry.getKey().toString());
buf.append(" : ");
serializer.serialize(entry.getValue(), buf);
}
buf.append("}");
}
}
private static class MaxKeySerializer extends CompoundObjectSerializer {
MaxKeySerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
serializer.serialize(new BasicDBObject("$maxKey",
1), buf);
}
}
private static class MinKeySerializer extends CompoundObjectSerializer {
MinKeySerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
serializer.serialize(new BasicDBObject("$minKey",
1), buf);
}
}
private static class ObjectIdSerializer extends CompoundObjectSerializer {
ObjectIdSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
serializer.serialize(
new BasicDBObject("$oid", obj.toString()), buf);
}
}
private static class PatternSerializer extends CompoundObjectSerializer {
PatternSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
DBObject externalForm = new BasicDBObject();
externalForm.put("$regex", obj.toString());
if (((Pattern) obj).flags() != 0)
externalForm.put("$options",
Bytes.regexFlags(((Pattern) obj).flags()));
serializer.serialize(externalForm, buf);
}
}
private static class StringSerializer extends AbstractObjectSerializer {
@Override
public void serialize(Object obj, StringBuilder buf) {
JSON.string(buf, (String) obj);
}
}
private static class UUIDSerializer extends CompoundObjectSerializer {
UUIDSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
UUID uuid = (UUID) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("$uuid", uuid.toString());
serializer.serialize(temp, buf);
}
}
private static class BSONTimestampSerializer extends CompoundObjectSerializer {
BSONTimestampSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
BSONTimestamp t = (BSONTimestamp) obj;
BasicDBObject temp = new BasicDBObject();
temp.put("t", Integer.valueOf(t.getTime()));
temp.put("i", Integer.valueOf(t.getInc()));
BasicDBObject timestampObj = new BasicDBObject();
timestampObj.put("$timestamp", temp);
serializer.serialize(timestampObj, buf);
}
}
private static class DateSerializer extends CompoundObjectSerializer {
DateSerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
Date d = (Date) obj;
serializer.serialize(
new BasicDBObject("$date", d.getTime()), buf);
}
}
private abstract static class BinarySerializerBase extends CompoundObjectSerializer {
BinarySerializerBase(ObjectSerializer serializer) {
super(serializer);
}
protected void serialize(byte[] bytes, byte type, StringBuilder buf) {
DBObject temp = new BasicDBObject();
temp.put("$binary",
(new Base64Codec()).encode(bytes));
temp.put("$type", type);
serializer.serialize(temp, buf);
}
}
private static class BinarySerializer extends BinarySerializerBase {
BinarySerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
Binary bin = (Binary) obj;
serialize(bin.getData(), bin.getType(), buf);
}
}
private static class ByteArraySerializer extends BinarySerializerBase {
ByteArraySerializer(ObjectSerializer serializer) {
super(serializer);
}
@Override
public void serialize(Object obj, StringBuilder buf) {
serialize((byte[]) obj, (byte) 0, buf);
}
}
}