/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.io;

import com.android.dx.util.Unsigned;

public final class MethodId implements Comparable<MethodId> {
    private final DexBuffer buffer;
    private final int declaringClassIndex;
    private final int protoIndex;
    private final int nameIndex;

    public MethodId(DexBuffer buffer, int declaringClassIndex, int protoIndex, int nameIndex) {
        this.buffer = buffer;
        this.declaringClassIndex = declaringClassIndex;
        this.protoIndex = protoIndex;
        this.nameIndex = nameIndex;
    }

    public int getDeclaringClassIndex() {
        return declaringClassIndex;
    }

    public int getProtoIndex() {
        return protoIndex;
    }

    public int getNameIndex() {
        return nameIndex;
    }

    public int compareTo(MethodId other) {
        if (declaringClassIndex != other.declaringClassIndex) {
            return Unsigned.compare(declaringClassIndex, other.declaringClassIndex);
        }
        if (nameIndex != other.nameIndex) {
            return Unsigned.compare(nameIndex, other.nameIndex);
        }
        return Unsigned.compare(protoIndex, other.protoIndex);
    }

    public void writeTo(DexBuffer.Section out) {
        out.writeUnsignedShort(declaringClassIndex);
        out.writeUnsignedShort(protoIndex);
        out.writeInt(nameIndex);
    }

    @Override public String toString() {
        if (buffer == null) {
            return declaringClassIndex + " " + protoIndex + " " + nameIndex;
        }
        return buffer.typeNames().get(declaringClassIndex)
                + "." + buffer.strings().get(nameIndex)
                + buffer.readTypeList(buffer.protoIds().get(protoIndex).getParametersOffset());
    }
}