/*
 * Licensed to ObjectStyle LLC under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ObjectStyle LLC 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 io.bootique.job.scheduler.execution;

import io.bootique.job.BaseJob;
import io.bootique.job.Job;
import io.bootique.job.runnable.JobResult;

import java.util.HashMap;
import java.util.Map;

/**
 * @since 3.0
 */
class JobParamDefaultsDecorator extends BaseJob {

    private final Job delegate;
    private final Map<String, Object> defaultParams;

    public JobParamDefaultsDecorator(Job delegate, Map<String, Object> defaultParams) {
        super(delegate.getMetadata());
        this.delegate = delegate;
        this.defaultParams = defaultParams;
    }

    @Override
    public JobResult run(Map<String, Object> params) {
        return delegate.run(mergeParams(params));
    }

    protected Map<String, Object> mergeParams(Map<String, Object> overridingParams) {
        Map<String, Object> merged = new HashMap<>(defaultParams);
        merged.putAll(overridingParams);
        return merged;
    }
}
