/*
 * Copyright (C) 2012 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.ide.eclipse.gltrace.state.transforms;

import com.android.ide.eclipse.gltrace.state.GLIntegerProperty;
import com.android.ide.eclipse.gltrace.state.GLStateType;
import com.android.ide.eclipse.gltrace.state.IGLProperty;

public class CurrentProgramPropertyAccessor implements IGLPropertyAccessor {
    private final int mContextId;
    private final GLStateType mStateCategory;
    private final int mLocation;
    private final GLStateType mStateType;
    private final IGLPropertyAccessor mCurrentProgramAccessor;

    public CurrentProgramPropertyAccessor(int contextid, GLStateType stateCategory,
            int location, GLStateType stateType) {
        mContextId = contextid;
        mStateCategory = stateCategory;
        mLocation = location;
        mStateType = stateType;

        mCurrentProgramAccessor = GLPropertyAccessor.makeAccessor(contextid,
                GLStateType.PROGRAM_STATE,
                GLStateType.CURRENT_PROGRAM);
    }

    @Override
    public IGLProperty getProperty(IGLProperty state) {
        // obtain the current program
        IGLProperty currentProgramProperty = mCurrentProgramAccessor.getProperty(state);
        if (!(currentProgramProperty instanceof GLIntegerProperty)) {
            return null;
        }

        Integer program = (Integer) currentProgramProperty.getValue();

        // now access the required program property
        return GLPropertyAccessor.makeAccessor(mContextId,
                                               GLStateType.PROGRAM_STATE,
                                               GLStateType.PROGRAMS,
                                               program,
                                               mStateCategory,
                                               Integer.valueOf(mLocation),
                                               mStateType).getProperty(state);
    }

    @Override
    public String getPath() {
        return String.format("PROGRAM_STATE/PROGRAMS/${program}/%s/%d/%s",
                mStateCategory, mLocation, mStateType);
    }
}