com.dyuproject.protostuff.runtime.ExplicitIdStrategy Maven / Gradle / Ivy
//================================================================================
//Copyright (c) 2012, David Yu
//All rights reserved.
//--------------------------------------------------------------------------------
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// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// 3. Neither the name of protostuff nor the names of its contributors may be used
// to endorse or promote products derived from this software without
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package com.dyuproject.protostuff.runtime;
import java.io.IOException;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumMap;
import java.util.EnumSet;
import java.util.IdentityHashMap;
import java.util.Map;
import com.dyuproject.protostuff.CollectionSchema;
import com.dyuproject.protostuff.Input;
import com.dyuproject.protostuff.MapSchema;
import com.dyuproject.protostuff.Message;
import com.dyuproject.protostuff.Output;
import com.dyuproject.protostuff.Pipe;
import com.dyuproject.protostuff.Schema;
/**
* Requires every messsage/pojo/enum/collection/map to be registered with unique ids.
*
* @author David Yu
* @created Mar 25, 2012
*/
public final class ExplicitIdStrategy extends NumericIdStrategy
{
/**
* This Registry is only way to register your pojos/enums/collections/maps/delegates.
*/
public static class Registry implements NumericIdStrategy.Registry
{
public final ExplicitIdStrategy strategy;
public Registry()
{
this(null, 0, 10, 10, 10, 10, 10);
}
public Registry(
int initialCollectionSize,
int initialMapSize,
int initialEnumSize,
int initialPojoSize,
int initialDelegateSize)
{
this(null, 0,
initialCollectionSize,
initialMapSize,
initialEnumSize,
initialPojoSize,
initialDelegateSize);
}
public Registry(
IdStrategy primaryGroup, int groupId,
int initialCollectionSize,
int initialMapSize,
int initialEnumSize,
int initialPojoSize,
int initialDelegateSize)
{
IdentityHashMap, RegisteredCollectionFactory> collectionMapping =
newMap(initialCollectionSize);
ArrayList collections =
newList(initialCollectionSize + 1);
IdentityHashMap, RegisteredMapFactory> mapMapping =
new IdentityHashMap, RegisteredMapFactory>(
initialMapSize);
ArrayList maps = newList(initialMapSize);
IdentityHashMap, RegisteredEnumIO> enumMapping =
newMap(initialEnumSize);
ArrayList enums =
newList(initialEnumSize + 1);
IdentityHashMap, BaseHS> pojoMapping =
newMap(initialPojoSize);
ArrayList> pojos = newList(initialPojoSize + 1);
IdentityHashMap, RegisteredDelegate> delegateMapping =
newMap(initialDelegateSize);
ArrayList> delegates = newList(initialDelegateSize + 1);
strategy = new ExplicitIdStrategy(
primaryGroup, groupId,
collectionMapping, collections,
mapMapping, maps,
enumMapping, enums,
pojoMapping, pojos,
delegateMapping, delegates);
}
/**
* Collection ids start at 1.
*/
public > Registry registerCollection(
CollectionSchema.MessageFactory factory, int id)
{
if(id < 1)
throw new IllegalArgumentException("collection ids start at 1.");
if(id >= strategy.collections.size())
grow(strategy.collections, id+1);
else if(strategy.collections.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + factory.typeClass() + ")");
}
RegisteredCollectionFactory rf = new RegisteredCollectionFactory(id, factory);
strategy.collections.set(id, rf);
// just in case
if(strategy.collectionMapping.put(factory.typeClass(), rf) != null)
throw new IllegalArgumentException("Duplicate registration for: " + factory.typeClass());
return this;
}
/**
* Map ids start at 1.
*/
public > Registry registerMap(
MapSchema.MessageFactory factory, int id)
{
if(id < 1)
throw new IllegalArgumentException("map ids start at 1.");
if(id >= strategy.maps.size())
grow(strategy.maps, id+1);
else if(strategy.maps.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + factory.typeClass() + ")");
}
RegisteredMapFactory rf = new RegisteredMapFactory(id, factory);
strategy.maps.set(id, rf);
// just in case
if(strategy.mapMapping.put(factory.typeClass(), rf) != null)
throw new IllegalArgumentException("Duplicate registration for: " + factory.typeClass());
return this;
}
/**
* Enum ids start at 1.
*/
public > Registry registerEnum(Class clazz, int id)
{
if(id < 1)
throw new IllegalArgumentException("enum ids start at 1.");
if(id >= strategy.enums.size())
grow(strategy.enums, id+1);
else if(strategy.enums.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + clazz.getName() + ")");
}
EnumIO eio = EnumIO.createFrom(clazz, strategy);
RegisteredEnumIO reio = new RegisteredEnumIO(id, eio);
strategy.enums.set(id, reio);
// just in case
if(strategy.enumMapping.put(clazz, reio) != null)
throw new IllegalArgumentException("Duplicate registration for: " + clazz);
return this;
}
/**
* Enum ids start at 1.
*/
public Registry registerEnum(EnumIO eio, int id)
{
if(id < 1)
throw new IllegalArgumentException("enum ids start at 1.");
if(id >= strategy.enums.size())
grow(strategy.enums, id+1);
else if(strategy.enums.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + eio.enumClass.getName() + ")");
}
RegisteredEnumIO reio = new RegisteredEnumIO(id, eio);
strategy.enums.set(id, reio);
// just in case
if(strategy.enumMapping.put(eio.enumClass, reio) != null)
throw new IllegalArgumentException("Duplicate registration for: " + eio.enumClass);
return this;
}
/**
* Pojo ids start at 1.
*/
public Registry registerPojo(Class clazz, int id)
{
if(clazz.isInterface() || Modifier.isAbstract(clazz.getModifiers()))
throw new IllegalArgumentException("Not a concrete class: " + clazz);
if(id < 1)
throw new IllegalArgumentException("pojo ids start at 1.");
if(id >= strategy.pojos.size())
grow(strategy.pojos, id+1);
else if(strategy.pojos.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + clazz.getName() + ")");
}
if(strategy.pojoMapping.containsKey(clazz))
throw new IllegalArgumentException("Duplicate registration for: " + clazz);
BaseHS wrapper = new Lazy(id, clazz, strategy);
strategy.pojos.set(id, wrapper);
strategy.pojoMapping.put(clazz, wrapper);
return this;
}
/**
* Pojo ids start at 1.
*/
public Registry registerPojo(Schema schema, Pipe.Schema pipeSchema,
int id)
{
if(id >= strategy.pojos.size())
grow(strategy.pojos, id+1);
else if(strategy.pojos.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + schema.typeClass().getName() + ")");
}
if(strategy.pojoMapping.containsKey(schema.typeClass()))
throw new IllegalArgumentException("Duplicate registration for: " + schema.typeClass());
Registered wrapper = new Registered(id, schema, pipeSchema, strategy);
strategy.pojos.set(id, wrapper);
strategy.pojoMapping.put(schema.typeClass(), wrapper);
return this;
}
/**
* If you are sure that you are only using a single implementation of
* your interface/abstract class, then it makes sense to map it directly
* to its impl class to avoid writing the type.
*
* Note that the type is always written when your field is
* {@link java.lang.Object}.
*
* Pojo ids start at 1.
*/
public Registry mapPojo(Class baseClass, Class implClass)
{
if(strategy.pojoMapping.containsKey(baseClass))
throw new IllegalArgumentException("Duplicate registration for: " + baseClass);
BaseHS wrapper = strategy.pojoMapping.get(implClass);
if(wrapper == null)
throw new IllegalArgumentException("Must register the impl class first. " + implClass);
strategy.pojoMapping.put(baseClass, wrapper);
return this;
}
/**
* Register a {@link Delegate} and assign an id.
*
* Delegate ids start at 1.
*/
public Registry registerDelegate(Delegate delegate, int id)
{
if(id < 1)
throw new IllegalArgumentException("delegate ids start at 1.");
if(id >= strategy.delegates.size())
grow(strategy.delegates, id+1);
else if(strategy.delegates.get(id) != null)
{
throw new IllegalArgumentException("Duplicate id registration: " + id +
" (" + delegate.typeClass() + ")");
}
RegisteredDelegate rd = new RegisteredDelegate(id, delegate, strategy);
strategy.delegates.set(id, rd);
// just in case
if(strategy.delegateMapping.put(delegate.typeClass(), rd) != null)
throw new IllegalArgumentException("Duplicate registration for: " + delegate.typeClass());
return this;
}
}
final IdentityHashMap, RegisteredCollectionFactory> collectionMapping;
final ArrayList collections;
final IdentityHashMap, RegisteredMapFactory> mapMapping;
final ArrayList maps;
final IdentityHashMap, RegisteredEnumIO> enumMapping;
final ArrayList enums;
final IdentityHashMap, BaseHS> pojoMapping;
final ArrayList> pojos;
final IdentityHashMap, RegisteredDelegate> delegateMapping;
final ArrayList> delegates;
public ExplicitIdStrategy(
IdentityHashMap, RegisteredCollectionFactory> collectionMapping,
ArrayList collections,
IdentityHashMap, RegisteredMapFactory> mapMapping,
ArrayList maps,
IdentityHashMap, RegisteredEnumIO> enumMapping,
ArrayList enums,
IdentityHashMap, BaseHS> pojoMapping,
ArrayList> pojos,
IdentityHashMap, RegisteredDelegate> delegateMapping,
ArrayList> delegates)
{
this(null, 0,
collectionMapping,
collections,
mapMapping,
maps,
enumMapping,
enums,
pojoMapping,
pojos,
delegateMapping,
delegates);
}
public ExplicitIdStrategy(
IdStrategy primaryGroup, int groupId,
IdentityHashMap, RegisteredCollectionFactory> collectionMapping,
ArrayList collections,
IdentityHashMap, RegisteredMapFactory> mapMapping,
ArrayList maps,
IdentityHashMap, RegisteredEnumIO> enumMapping,
ArrayList enums,
IdentityHashMap, BaseHS> pojoMapping,
ArrayList> pojos,
IdentityHashMap, RegisteredDelegate> delegateMapping,
ArrayList> delegates)
{
super(primaryGroup, groupId);
this.collectionMapping = collectionMapping;
this.collections = collections;
this.mapMapping = mapMapping;
this.maps = maps;
this.enumMapping = enumMapping;
this.enums = enums;
this.pojoMapping = pojoMapping;
this.pojos = pojos;
this.delegateMapping = delegateMapping;
this.delegates = delegates;
}
public boolean isRegistered(Class typeClass)
{
return pojoMapping.containsKey(typeClass);
}
@SuppressWarnings("unchecked")
public HasSchema getRegistered(Class typeClass)
{
return (HasSchema)pojoMapping.get(typeClass);
}
@SuppressWarnings("unchecked")
public HasSchema getSchemaWrapper(Class typeClass, boolean create)
{
final BaseHS wrapper = (BaseHS)pojoMapping.get(typeClass);
if(wrapper == null && create)
throw new UnknownTypeException("pojo: " + typeClass);
return wrapper;
}
protected EnumIO> getEnumIO(Class enumClass)
{
final RegisteredEnumIO reio = enumMapping.get(enumClass);
if(reio == null)
throw new UnknownTypeException("enum: " + enumClass);
return reio.eio;
}
protected CollectionSchema.MessageFactory getCollectionFactory(Class clazz)
{
final RegisteredCollectionFactory rf = collectionMapping.get(clazz);
if(rf == null)
{
if(clazz.getName().startsWith("java.util"))
return CollectionSchema.MessageFactories.valueOf(clazz.getSimpleName());
throw new UnknownTypeException("collection: " + clazz);
}
return rf;
}
protected MapSchema.MessageFactory getMapFactory(Class clazz)
{
final RegisteredMapFactory rf = mapMapping.get(clazz);
if(rf == null)
{
if(clazz.getName().startsWith("java.util"))
return MapSchema.MessageFactories.valueOf(clazz.getSimpleName());
throw new UnknownTypeException("map: " + clazz);
}
return rf;
}
protected void writeCollectionIdTo(Output output, int fieldNumber, Class clazz)
throws IOException
{
final RegisteredCollectionFactory factory = collectionMapping.get(clazz);
if(factory == null)
throw new UnknownTypeException("collection: " + clazz);
output.writeUInt32(fieldNumber, factory.id, false);
}
protected void transferCollectionId(Input input, Output output,
int fieldNumber) throws IOException
{
output.writeUInt32(fieldNumber, input.readUInt32(), false);
}
protected CollectionSchema.MessageFactory resolveCollectionFrom(Input input)
throws IOException
{
final int id = input.readUInt32();
final CollectionSchema.MessageFactory factory = id < collections.size() ?
collections.get(id) : null;
if(factory == null)
throw new UnknownTypeException("collection id: " + id + " (Outdated registry)");
return factory;
}
protected void writeMapIdTo(Output output, int fieldNumber, Class clazz)
throws IOException
{
final RegisteredMapFactory factory = mapMapping.get(clazz);
if(factory == null)
throw new UnknownTypeException("map: " + clazz);
output.writeUInt32(fieldNumber, factory.id, false);
}
protected void transferMapId(Input input, Output output,
int fieldNumber) throws IOException
{
output.writeUInt32(fieldNumber, input.readUInt32(), false);
}
protected MapSchema.MessageFactory resolveMapFrom(Input input)
throws IOException
{
final int id = input.readUInt32();
final MapSchema.MessageFactory factory = id < maps.size() ? maps.get(id) : null;
if(factory == null)
throw new UnknownTypeException("map id: " + id + " (Outdated registry)");
return factory;
}
protected void writeEnumIdTo(Output output, int fieldNumber,
Class clazz) throws IOException
{
final RegisteredEnumIO reio = enumMapping.get(clazz);
if(reio == null)
throw new UnknownTypeException("enum: " + clazz);
output.writeUInt32(fieldNumber, reio.id , false);
}
protected EnumIO transferEnumId(Input input, Output output,
int fieldNumber) throws IOException
{
final int id = input.readUInt32();
final RegisteredEnumIO reio = id < enums.size() ? enums.get(id) : null;
if (reio == null)
throw new UnknownTypeException("enum id: " + id + " (Outdated registry)");
output.writeUInt32(fieldNumber, id, false);
return reio.eio;
}
protected EnumIO resolveEnumFrom(Input input) throws IOException
{
final int id = input.readUInt32();
final RegisteredEnumIO reio = id < enums.size() ? enums.get(id) : null;
if(reio == null)
throw new UnknownTypeException("enum id: " + id + " (Outdated registry)");
return reio.eio;
}
public boolean isDelegateRegistered(Class typeClass)
{
return delegateMapping.containsKey(typeClass);
}
@SuppressWarnings("unchecked")
public Delegate getDelegate(Class typeClass)
{
final RegisteredDelegate rd = (RegisteredDelegate)delegateMapping.get(
typeClass);
return rd == null ? null : rd.delegate;
}
@SuppressWarnings("unchecked")
public HasDelegate getDelegateWrapper(Class typeClass)
{
return (HasDelegate)delegateMapping.get(typeClass);
}
@SuppressWarnings("unchecked")
protected HasDelegate tryWriteDelegateIdTo(Output output, int fieldNumber,
Class clazz) throws IOException
{
final RegisteredDelegate rd = (RegisteredDelegate)delegateMapping.get(
clazz);
if(rd == null)
return null;
output.writeUInt32(fieldNumber, rd.id, false);
return rd;
}
@SuppressWarnings("unchecked")
protected HasDelegate transferDelegateId(Input input, Output output, int fieldNumber)
throws IOException
{
final int id = input.readUInt32();
final RegisteredDelegate rd = id < delegates.size() ?
(RegisteredDelegate)delegates.get(id) : null;
if(rd == null)
throw new UnknownTypeException("delegate id: " + id + " (Outdated registry)");
output.writeUInt32(fieldNumber, id, false);
return rd;
}
@SuppressWarnings("unchecked")
protected HasDelegate resolveDelegateFrom(Input input) throws IOException
{
final int id = input.readUInt32();
final RegisteredDelegate rd = id < delegates.size() ?
(RegisteredDelegate)delegates.get(id) : null;
if(rd == null)
throw new UnknownTypeException("delegate id: " + id + " (Outdated registry)");
return rd;
}
@SuppressWarnings("unchecked")
protected HasSchema tryWritePojoIdTo(Output output, int fieldNumber,
Class clazz, boolean registered) throws IOException
{
final BaseHS wrapper = (BaseHS) pojoMapping.get(clazz);
if (wrapper != null)
output.writeUInt32(fieldNumber, wrapper.id, false);
return wrapper;
}
protected void writePojoIdTo(Output output, int fieldNumber,
Class clazz, HasSchema hs) throws IOException
{
output.writeUInt32(fieldNumber, ((BaseHS)hs).id, false);
}
@SuppressWarnings("unchecked")
protected HasSchema writePojoIdTo(Output output, int fieldNumber, Class clazz)
throws IOException
{
final BaseHS wrapper = (BaseHS)pojoMapping.get(clazz);
if(wrapper == null)
throw new UnknownTypeException("pojo: " + clazz);
output.writeUInt32(fieldNumber, wrapper.id, false);
return wrapper;
}
@SuppressWarnings("unchecked")
protected HasSchema transferPojoId(Input input, Output output,
int fieldNumber) throws IOException
{
final int id = input.readUInt32();
final BaseHS wrapper = (BaseHS)pojos.get(id);
if(wrapper == null)
throw new UnknownTypeException("pojo id: " + id + " (Outdated registry)");
output.writeUInt32(fieldNumber, id, false);
return wrapper;
}
@SuppressWarnings("unchecked")
protected HasSchema resolvePojoFrom(Input input, int fieldNumber)
throws IOException
{
final int id = input.readUInt32();
final BaseHS wrapper = id < pojos.size() ? (BaseHS)pojos.get(id) : null;
if(wrapper == null)
throw new UnknownTypeException("pojo id: " + id + " (Outdated registry)");
return wrapper;
}
@SuppressWarnings("unchecked")
protected Schema writeMessageIdTo(Output output, int fieldNumber,
Message message) throws IOException
{
final BaseHS wrapper = (BaseHS)pojoMapping.get(message.getClass());
if(wrapper == null)
throw new UnknownTypeException("pojo: " + message.getClass());
output.writeUInt32(fieldNumber, wrapper.id, false);
// TODO allow the wrapper to return an override schema?
return message.cachedSchema();
}
protected Class collectionClass(int id)
{
final RegisteredCollectionFactory factory = id < collections.size() ?
collections.get(id) : null;
if(factory == null)
{
throw new UnknownTypeException("collection id: " + id +
" (Outdated registry)");
}
return factory.typeClass();
}
protected Class mapClass(int id)
{
final RegisteredMapFactory factory = id < maps.size() ?
maps.get(id) : null;
if(factory == null)
{
throw new UnknownTypeException("map id: " + id +
" (Outdated registry)");
}
return factory.typeClass();
}
protected Class enumClass(int id)
{
final RegisteredEnumIO reio = id < enums.size() ? enums.get(id) : null;
if(reio == null)
{
throw new UnknownTypeException("enum id: " + id +
" (Outdated registry)");
}
return reio.eio.enumClass;
}
protected Class delegateClass(int id)
{
final RegisteredDelegate rd = id < delegates.size() ? delegates.get(id) : null;
return rd == null ? null : rd.delegate.typeClass();
}
protected Class pojoClass(int id)
{
final BaseHS wrapper = id < pojos.size() ? pojos.get(id) : null;
if(wrapper == null)
{
throw new UnknownTypeException("pojo id: " + id +
" (Outdated registry)");
}
return wrapper.getSchema().typeClass();
}
protected RegisteredDelegate getRegisteredDelegate(Class clazz)
{
return delegateMapping.get(clazz);
}
protected int getEnumId(Class clazz)
{
final RegisteredEnumIO reio = enumMapping.get(clazz);
if(reio == null)
throw new UnknownTypeException("enum: " + clazz);
return (reio.id << 5) | CID_ENUM;
}
protected int getId(Class clazz)
{
if(Message.class.isAssignableFrom(clazz))
{
final BaseHS wrapper = pojoMapping.get(clazz);
if(wrapper == null)
throw new UnknownTypeException("pojo: " + clazz);
return (wrapper.id << 5) | CID_POJO;
}
if(Map.class.isAssignableFrom(clazz))
return EnumMap.class.isAssignableFrom(clazz) ? CID_ENUM_MAP : mapId(clazz);
if(Collection.class.isAssignableFrom(clazz))
return EnumSet.class.isAssignableFrom(clazz) ? CID_ENUM_SET: collectionId(clazz);
final BaseHS wrapper = pojoMapping.get(clazz);
if(wrapper == null)
throw new UnknownTypeException("pojo: " + clazz);
return (wrapper.id << 5) | CID_POJO;
}
private int collectionId(Class clazz)
{
final RegisteredCollectionFactory factory = collectionMapping.get(clazz);
if(factory == null)
throw new UnknownTypeException("collection: " + clazz);
return (factory.id << 5) | CID_COLLECTION;
}
private int mapId(Class clazz)
{
final RegisteredMapFactory factory = mapMapping.get(clazz);
if(factory == null)
throw new UnknownTypeException("map: " + clazz);
return (factory.id << 5) | CID_MAP;
}
static IdentityHashMap newMap(int size)
{
return new IdentityHashMap(size);
}
static final class RegisteredCollectionFactory implements CollectionSchema.MessageFactory
{
final int id;
final CollectionSchema.MessageFactory factory;
public RegisteredCollectionFactory(int id, CollectionSchema.MessageFactory factory)
{
this.id = id;
this.factory = factory;
}
public Collection newMessage()
{
return factory.newMessage();
}
public Class typeClass()
{
return factory.typeClass();
}
}
static final class RegisteredMapFactory implements MapSchema.MessageFactory
{
final int id;
final MapSchema.MessageFactory factory;
public RegisteredMapFactory(int id, MapSchema.MessageFactory factory)
{
this.id = id;
this.factory = factory;
}
public Map newMessage()
{
return factory.newMessage();
}
public Class typeClass()
{
return factory.typeClass();
}
}
static final class RegisteredEnumIO
{
final int id;
final EnumIO eio;
public RegisteredEnumIO(int id, EnumIO eio)
{
this.id = id;
this.eio = eio;
}
}
static abstract class BaseHS extends HasSchema
{
final int id;
BaseHS(int id, IdStrategy strategy)
{
super(strategy);
this.id = id;
}
}
static final class Registered extends BaseHS
{
final Schema schema;
final Pipe.Schema pipeSchema;
Registered(int id, Schema schema, Pipe.Schema pipeSchema,
IdStrategy strategy)
{
super(id, strategy);
this.schema = schema;
this.pipeSchema = pipeSchema;
}
public Schema getSchema()
{
return schema;
}
public com.dyuproject.protostuff.Pipe.Schema getPipeSchema()
{
return pipeSchema;
}
}
static final class Lazy extends BaseHS
{
final Class typeClass;
private volatile Schema schema;
private volatile Pipe.Schema pipeSchema;
Lazy(int id, Class typeClass, IdStrategy strategy)
{
super(id, strategy);
this.typeClass = typeClass;
}
@SuppressWarnings("unchecked")
public Schema getSchema()
{
Schema schema = this.schema;
if(schema==null)
{
synchronized(this)
{
if((schema = this.schema) == null)
{
if(Message.class.isAssignableFrom(typeClass))
{
// use the message's schema.
this.schema = schema = ((Message)createMessageInstance(typeClass)).cachedSchema();
}
else
{
// create new
this.schema = schema = strategy.newSchema(typeClass);
}
}
}
}
return schema;
}
public Pipe.Schema getPipeSchema()
{
Pipe.Schema pipeSchema = this.pipeSchema;
if(pipeSchema == null)
{
synchronized(this)
{
if((pipeSchema = this.pipeSchema) == null)
{
this.pipeSchema = pipeSchema = RuntimeSchema.resolvePipeSchema(
getSchema(), typeClass, true);
}
}
}
return pipeSchema;
}
}
}
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