com.cloudera.exhibit.core.composite.CompositeExhibit.java Source code

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Here is the source code for com.cloudera.exhibit.core.composite.CompositeExhibit.java

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/*
 * Copyright (c) 2015, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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.cloudera.exhibit.core.composite;

import com.cloudera.exhibit.core.Exhibit;
import com.cloudera.exhibit.core.ExhibitDescriptor;
import com.cloudera.exhibit.core.Frame;
import com.cloudera.exhibit.core.Obs;
import com.cloudera.exhibit.core.ObsDescriptor;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import java.util.List;
import java.util.Map;

public class CompositeExhibit implements Exhibit {

    private ExhibitDescriptor descriptor;
    private Obs attributes;
    private Map<String, Frame> frames;

    public static CompositeExhibit create(List<Exhibit> components) {
        List<ObsDescriptor> descs = Lists.newArrayList();
        Map<String, ObsDescriptor> frameDescs = Maps.newHashMap();
        for (Exhibit e : components) {
            descs.add(e.descriptor().attributes());
            frameDescs.putAll(e.descriptor().frames());
        }
        return create(new ExhibitDescriptor(new CompositeObsDescriptor(descs), frameDescs), components);
    }

    public static CompositeExhibit create(ExhibitDescriptor descriptor, List<Exhibit> components) {
        Map<String, Frame> frames = Maps.newHashMap();
        List<Obs> attrs = Lists.newArrayList();
        for (Exhibit e : components) {
            attrs.add(e.attributes());
            frames.putAll(e.frames());
        }
        CompositeObsDescriptor cod = (CompositeObsDescriptor) descriptor.attributes();
        return new CompositeExhibit(descriptor, new CompositeObs(cod, attrs), frames);
    }

    CompositeExhibit(ExhibitDescriptor descriptor, Obs attributes, Map<String, Frame> frames) {
        this.descriptor = descriptor;
        this.attributes = attributes;
        this.frames = frames;
    }

    @Override
    public ExhibitDescriptor descriptor() {
        return descriptor;
    }

    @Override
    public Obs attributes() {
        return attributes;
    }

    @Override
    public Map<String, Frame> frames() {
        return frames;
    }
}