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/*
* Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.runtime;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.invoke.MethodType;
import java.util.Map;
import jdk.nashorn.internal.codegen.CompileUnit;
import jdk.nashorn.internal.codegen.FunctionSignature;
import jdk.nashorn.internal.codegen.types.Type;
import jdk.nashorn.internal.ir.FunctionNode;
/**
* Class that contains information allowing us to look up a method handle implementing a JavaScript function
* from a generated class. This is used both for code coming from codegen and for persistent serialized code.
*/
public final class FunctionInitializer implements Serializable {
private final String className;
private final MethodType methodType;
private final int flags;
private transient Map<Integer, Type> invalidatedProgramPoints;
private transient Class<?> code;
private static final long serialVersionUID = -5420835725902966692L;
/**
* Constructor.
*
* @param functionNode the function node
*/
public FunctionInitializer(final FunctionNode functionNode) {
this(functionNode, null);
}
/**
* Copy constructor.
*
* @param init original initializer
*/
FunctionInitializer(final FunctionInitializer init) {
this.className = init.getClassName();
this.methodType = init.getMethodType();
this.flags = init.getFlags();
}
/**
* Constructor.
*
* @param functionNode the function node
* @param invalidatedProgramPoints invalidated program points
*/
public FunctionInitializer(final FunctionNode functionNode, final Map<Integer, Type> invalidatedProgramPoints) {
this.className = functionNode.getCompileUnit().getUnitClassName();
this.methodType = new FunctionSignature(functionNode).getMethodType();
this.flags = functionNode.getFlags();
this.invalidatedProgramPoints = invalidatedProgramPoints;
final CompileUnit cu = functionNode.getCompileUnit();
if (cu != null) {
this.code = cu.getCode();
}
assert className != null;
}
/**
* Returns the name of the class implementing the function.
*
* @return the class name
*/
public String getClassName() {
return className;
}
/**
* Returns the type of the method implementing the function.
*
* @return the method type
*/
public MethodType getMethodType() {
return methodType;
}
/**
* Returns the function flags.
*
* @return function flags
*/
public int getFlags() {
return flags;
}
/**
* Returns the class implementing the function.
*
* @return the class
*/
public Class<?> getCode() {
return code;
}
/**
* Set the class implementing the function
* @param code the class
*/
public void setCode(final Class<?> code) {
// Make sure code has not been set and has expected class name
if (this.code != null) {
throw new IllegalStateException("code already set");
}
assert className.equals(code.getTypeName().replace('.', '/')) : "unexpected class name";
this.code = code;
}
/**
* Returns the map of invalidated program points.
*
* @return invalidated program points
*/
public Map<Integer, Type> getInvalidatedProgramPoints() {
return invalidatedProgramPoints;
}
private void writeObject(final ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
Type.writeTypeMap(invalidatedProgramPoints, out);
}
private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
in.defaultReadObject();
invalidatedProgramPoints = Type.readTypeMap(in);
}
}
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