com.cloudera.exhibit.core.simple.SimpleExhibitStore.java Source code

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Here is the source code for com.cloudera.exhibit.core.simple.SimpleExhibitStore.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.simple;

import com.cloudera.exhibit.core.Exhibit;
import com.cloudera.exhibit.core.ExhibitId;
import com.cloudera.exhibit.core.ExhibitStore;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;

import java.util.Map;
import java.util.Set;

public class SimpleExhibitStore implements ExhibitStore {

    private final String entity;
    private final Map<String, Exhibit> exhibits;

    public static SimpleExhibitStore of(String entity, Map<String, Exhibit> exhibits) {
        return new SimpleExhibitStore(entity, exhibits);
    }

    public SimpleExhibitStore(String entity, Map<String, Exhibit> exhibits) {
        this.entity = Preconditions.checkNotNull(entity);
        this.exhibits = Preconditions.checkNotNull(exhibits);
    }

    @Override
    public boolean isConnected() {
        return true;
    }

    @Override
    public Set<String> entities() {
        return ImmutableSet.of(entity);
    }

    @Override
    public Optional<Exhibit> find(ExhibitId id) {
        if (!entity.equals(id.getEntity())) {
            return Optional.absent();
        }
        return Optional.fromNullable(exhibits.get(id.getId()));
    }
}