/*
 * Copyright (c) 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 com.sun.tdk.jcov.instrument;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

/**
 * LocationRef
 *
 *
 * @author Robert Field
 */
public abstract class LocationRef extends LocationAbstract {

    LocationConcrete lc;

    /**
     * Creates a new instance of LocationAbstract
     */
    LocationRef(int rootId, LocationConcrete lc) {
        super(rootId);
        this.lc = lc;
    }

    LocationRef(int rootId) {
        this(rootId, (LocationConcrete) null);
    }

    public void setConcreteLocation(LocationConcrete lc) {
        this.lc = lc;
    }

    public int startBCI() {
        return lc.startBCI();
    }

    public int endBCI() {
        return lc.endBCI();
    }

    LocationRef(int rootId, DataInput in) throws IOException {
        super(rootId);
        if (in.readBoolean()) {
            int start = in.readShort();
            int end = in.readShort();
            final String kind = readString(in);
            this.lc = new LocationConcrete(rootId, start, end) {
                @Override
                public String kind() {
                    return kind;
                }
            };
        } else {
            lc = null;
        }
    }

    void writeObject(DataOutput out) throws IOException {
        if (this.lc != null) {
            out.writeBoolean(true);
            out.writeShort(lc.startBCI());
            out.writeShort(lc.endBCI());
            writeString(out, kind());
        } else {
            out.writeBoolean(false);
        }
    }
}