/*
 * $Id$
 *
 * Copyright (C) 2003-2015 JNode.org
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; If not, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package org.jnode.vm.classmgr;


/**
 * Abstract entry of a constantpool describing an member (method or field) reference.
 *
 * @author epr
 */
abstract class VmConstMemberRef extends VmResolvableConstObject {

    private final int cachedHashCode;
    private final VmConstClass constClass;
    private final String name;
    private final String descriptor;

    VmConstMemberRef(VmConstClass constClass, String name, String descriptor) {
        this.constClass = constClass;
        this.name = name;
        this.descriptor = descriptor;
        this.cachedHashCode = VmMember.calcHashCode(name, descriptor);
    }

    /**
     * Gets the ConstClass this member constants refers to.
     *
     * @return VmConstClass
     */
    public final VmConstClass getConstClass() {
        return constClass;
    }

    /**
     * Gets the name of the class of the members this constants refers to.
     *
     * @return String
     */
    public final String getClassName() {
        return getConstClass().getClassName();
    }

    /**
     * Gets the name of the members this constants refers to.
     *
     * @return String
     */
    public final String getName() {
        return name;
    }

    /**
     * Gets the type descriptor of the members this constants refers to.
     *
     * @return String
     */
    public final String getSignature() {
        return descriptor;
    }

    /**
     * Resolve the references of this constant to loaded VmXxx objects.
     *
     * @param clc
     */
    protected final void doResolve(VmClassLoader clc) {
        getConstClass().resolve(clc);
        doResolveMember(clc);
    }

    /**
     * Resolve the references of this constant to loaded VmXxx objects.
     *
     * @param clc
     */
    protected abstract void doResolveMember(VmClassLoader clc);

    /**
     * Convert myself into a String representation
     *
     * @return String
     * @see java.lang.Object#toString()
     */
    public final String toString() {
        String type = getClass().getName();
        type = type.substring(type.lastIndexOf('.') + 1 + 2);
        return type + ": " + getClassName() + '.' + getName() + " [" + getSignature() + ']';
    }

    /**
     * @return int
     * @see java.lang.Object#hashCode()
     */
    public final int getMemberHashCode() {
        return cachedHashCode;
    }
}