com.tangosol.internal.util.invoke.RemoteConstructor Maven / Gradle / Ivy
Show all versions of coherence Show documentation
/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.internal.util.invoke;
import com.tangosol.io.ClassLoaderAware;
import com.tangosol.io.ExternalizableLite;
import com.tangosol.io.SerializationSupport;
import com.tangosol.io.Serializer;
import com.tangosol.io.SerializerAware;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
import com.tangosol.util.Base;
import com.tangosol.util.ExternalizableHelper;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.Arrays;
import javax.json.bind.annotation.JsonbProperty;
/**
* RemoteConstructor represents both a ClassDefinition for a {@link Remotable}
* class and the state required to construct an instance of that class.
*
* It is used as a wire transport for the {@code Remotable} classes using a
* combination of {@link Remotable#writeReplace()} and {@link #readResolve()}
* methods, and enables automatic serialization of all {@link Remotable} objects.
*
* @see SerializationSupport
* @see Remotable#writeReplace()
*
* @author hr/as 2015.06.01
* @since 12.2.1
*/
public class RemoteConstructor
implements ExternalizableLite, PortableObject, SerializationSupport, SerializerAware
{
// ----- constructors ---------------------------------------------------
/**
* Deserialization constructor.
*/
public RemoteConstructor()
{
}
/**
* Construct a {@code RemoteConstructor} based on the provided
* {@link ClassDefinition} and constructor arguments.
*
* @param definition the {@code ClassDefinition} for the {@link Remotable}
* class this {@code RemoteConstructor} represents
* @param aoArgs the arguments for this {@code RemoteConstructor}
*/
public RemoteConstructor(ClassDefinition definition, Object[] aoArgs)
{
m_definition = definition;
for (int i = 0; i < aoArgs.length; i++)
{
Object arg = aoArgs[i];
aoArgs[i] = Lambdas.isLambda(arg)
? Lambdas.ensureRemotable((Serializable) arg)
: arg;
}
m_aoArgs = aoArgs;
}
// ----- accessors ------------------------------------------------------
/**
* Return the {@link ClassIdentity} for the {@link Remotable} class this
* {@code RemoteConstructor} represents.
*
* @return the {@code ClassIdentity} for the {@code Remotable} class this
* {@code RemoteConstructor} represents
*/
public ClassIdentity getId()
{
return getDefinition().getId();
}
/**
* Return the {@link ClassDefinition} for the {@link Remotable} class this
* {@code RemoteConstructor} represents.
*
* @return the {@code ClassDefinition} for the {@code Remotable} class this
* {@code RemoteConstructor} represents
*/
public ClassDefinition getDefinition()
{
return m_definition;
}
/**
* Return the arguments for this {@code RemoteConstructor}.
*
* @return the arguments for this {@code RemoteConstructor}
*/
public Object[] getArguments()
{
return m_aoArgs;
}
// ----- public methods -------------------------------------------------
/**
* Create a new instance of the {@link Remotable} class represented by
* this {@code RemoteConstructor}.
*
* @return a new instance of the {@code Remotable} class
*/
@SuppressWarnings("unchecked")
public T newInstance()
{
RemotableSupport support = RemotableSupport.get(getClassLoader());
return support.realize(this);
}
/**
* Return the ClassLoader that should be used to define the Class this RemoteConstructor
* represents. The absence of a ClassLoader from the Serializer will result in
* using the Thread's context ClassLoader.
*
* @return an appropriate ClassLoader
*/
protected ClassLoader getClassLoader()
{
ClassLoader loader = m_loader;
return loader == null ? Base.getContextClassLoader(this) : loader;
}
// ----- Object methods -------------------------------------------------
@Override
public boolean equals(Object o)
{
if (o instanceof RemoteConstructor)
{
RemoteConstructor that = (RemoteConstructor) o;
return this == that ||
this.getClass() == that.getClass() &&
Base.equals(m_definition, that.m_definition) &&
Base.equalsDeep(m_aoArgs, that.m_aoArgs);
}
return false;
}
@Override
public int hashCode()
{
int nHash = m_definition.hashCode();
nHash = 31 * nHash + Arrays.hashCode(m_aoArgs);
return nHash;
}
@Override
public String toString()
{
return "RemoteConstructor{" +
"definition=" + m_definition +
", arguments=" + Arrays.toString(m_aoArgs) +
'}';
}
// ----- ExternalizableLite interface -----------------------------------
@Override
public void readExternal(DataInput in)
throws IOException
{
m_definition = ExternalizableHelper.readObject(in);
int cArgs = ExternalizableHelper.readInt(in);
Base.azzert(cArgs < 256, "Unexpected number of constructor arguments.");
Object[] aoArgs = m_aoArgs = new Object[cArgs];
for (int i = 0; i < aoArgs.length; i++)
{
aoArgs[i] = ExternalizableHelper.readObject(in);
}
}
@Override
public void writeExternal(DataOutput out)
throws IOException
{
ExternalizableHelper.writeObject(out, m_definition);
Object[] aoArgs = m_aoArgs;
ExternalizableHelper.writeInt(out, aoArgs.length);
for (Object o : aoArgs)
{
ExternalizableHelper.writeObject(out, o);
}
}
// ----- PortableObject methods -----------------------------------------
@Override
public void readExternal(PofReader in)
throws IOException
{
m_definition = in.readObject(0);
m_aoArgs = in.readArray(1, Object[]::new);
}
@Override
public void writeExternal(PofWriter out)
throws IOException
{
out.writeObject(0, m_definition);
out.writeObjectArray(1, m_aoArgs);
}
// ---- SerializationSupport interface ----------------------------------
/**
* {@inheritDoc}
*
* It provides deserialization support for {@link Remotable}
* objects by converting this {@code RemoteConstructor} into the appropriate
* {@code Remotable} instance upon deserialization.
*
* @throws NotSerializableException if {@link Lambdas#LAMBDAS_SERIALIZATION_MODE} is {@code true}.
*/
@Override
public Object readResolve() throws ObjectStreamException
{
// protect against a remote client with dynamic lambdas enabled
if (!Lambdas.isDynamicLambdas())
{
throw new NotSerializableException(RemoteConstructor.class.getName());
}
return newInstance();
}
// ---- SerializerAware interface ----------------------------------
@Override
public Serializer getContextSerializer()
{
return m_serializer;
}
@Override
public void setContextSerializer(Serializer serializer)
{
m_serializer = serializer;
if (serializer instanceof ClassLoaderAware)
{
m_loader = ((ClassLoaderAware) serializer).getContextClassLoader();
}
}
// ----- data members ---------------------------------------------------
/**
* The ClassDefinition for the Remotable class.
*
* It is expected for the same ClassDefinition to be referenced by many
* RemoteConstructor instances.
*/
@JsonbProperty("definition")
protected ClassDefinition m_definition;
/**
* The constructor arguments to use when creating new Remotable instance.
*/
@JsonbProperty("args")
protected Object[] m_aoArgs;
/**
* The Serializer used to deserialize this instance.
*/
private transient Serializer m_serializer;
/**
* The context ClassLoader used by the Serializer.
*/
protected transient ClassLoader m_loader;
}