org.glassfish.pfl.dynamic.codegen.impl.MethodInfoBase Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of pfl-dynamic Show documentation
Functionality that may include class generation
There is a newer version: 5.0.0
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.pfl.dynamic.codegen.impl;

import java.lang.reflect.Method ;
import java.lang.reflect.Constructor ;

import java.util.List ;
import java.util.ArrayList ;

import org.glassfish.pfl.dynamic.codegen.spi.MethodInfo ;
import org.glassfish.pfl.dynamic.codegen.spi.ClassInfo ;
import org.glassfish.pfl.dynamic.codegen.spi.Type ;
import org.glassfish.pfl.dynamic.codegen.spi.Signature ;
import org.glassfish.pfl.dynamic.codegen.spi.Variable ;

public abstract class MethodInfoBase extends MemberInfoBase
    implements MethodInfo {

    protected Type rtype ;
    protected List exceptions ;
    protected List arguments ;
    protected boolean isConstructor ;

    private Signature sig ;
    private boolean sigIsCached ;

    private int hashValue ;
    private boolean hashIsCached ;

    protected MethodInfoBase( ClassInfo cinfo, int modifiers ) {
	this( cinfo, modifiers, Type._void(), CodeGeneratorUtil.CONSTRUCTOR_METHOD_NAME ) ;
	this.isConstructor = true ;
    }

    protected MethodInfoBase( ClassInfo cinfo, int modifiers, Type rtype, String name ) {
	super( cinfo, modifiers, name ) ;
	this.rtype = rtype ;
	this.exceptions = new ArrayList() ;
	this.arguments = new ArrayList() ;

	sig = null ;
	sigIsCached = false ;

	hashValue = 0 ;
	hashIsCached = false ;

	this.isConstructor = false ;
    }

    public boolean isConstructor() {
	return isConstructor ;
    }

    public Type returnType() {
	return rtype ;
    }

    public List exceptions() {
	return exceptions ;
    }

    public List arguments() {
	return this.arguments ;
    }

    public synchronized Signature signature() {
	if (!sigIsCached) {
	    List argTypes = new ArrayList(arguments.size()) ;
	    for (Variable var : arguments)
		argTypes.add( ((VariableInternal)var).type() ) ;
	    sig = Signature.make( rtype, argTypes ) ;
	}

	return sig ;
    }

    public Method getMethod() {
	return null ;
    }

    public Constructor getConstructor() {
	return null ;
    }

    public boolean equals( Object obj ) {
	if (obj == this)
	    return true ;

	if (!(obj instanceof MethodInfo))
	    return false ;
    
	MethodInfo other = MethodInfo.class.cast( obj ) ;

	if (hashCode() != other.hashCode())
	    return false ;

	if (!super.equals( obj ))
	    return false ;

	if (!signature().equals( other.signature() ))
	    return false ;

	if (!exceptions().equals( other.exceptions() )) 
	    return false ;

	return true ;
    }

    public synchronized void clearHashCode() {
	hashIsCached = false ;
	hashValue = 0 ;
    }

    public synchronized int hashCode() {
	if (!hashIsCached) {
	    hashValue = super.hashCode() ;
	    hashValue ^= signature().hashCode() ;
	    hashValue ^= exceptions().hashCode() ;

	    hashIsCached = true ;
	}

	return hashValue ;
    }
}