/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.wayang.tensorflow.execution;

import org.apache.wayang.core.platform.CrossPlatformExecutor;
import org.apache.wayang.core.platform.ExecutionResourceTemplate;

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

public class TensorflowContextReference extends ExecutionResourceTemplate {

    final private List<AutoCloseable> resources;

    public TensorflowContextReference(CrossPlatformExecutor crossPlatformExecutor) {
        super(null);
        if (crossPlatformExecutor != null) {
            crossPlatformExecutor.registerGlobal(this);
        }

        this.resources = new ArrayList<>();
    }

    public void addResource(AutoCloseable resource) {
        resources.add(resource);
    }

    @Override
    protected void doDispose() throws Throwable {
        assert !this.isDisposed();

        for (int i = resources.size() - 1; i >= 0; i--) {
            resources.get(i).close();
        }
    }
}
