com.torodb.mongowp.bson.abst.AbstractIterableBasedBsonDocument.java Source code

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Here is the source code for com.torodb.mongowp.bson.abst.AbstractIterableBasedBsonDocument.java

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/*
 * Copyright 2014 8Kdata Technology
 *
 * 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.torodb.mongowp.bson.abst;

import com.google.common.collect.Iterables;
import com.torodb.mongowp.bson.BsonValue;

public abstract class AbstractIterableBasedBsonDocument extends AbstractBsonDocument {

    private int cachedSize = -1;

    @Override
    public BsonValue<?> get(String key) {
        Entry<?> entry = getEntry(key);
        if (entry == null) {
            return null;
        }
        return entry.getValue();
    }

    @Override
    public boolean containsKey(String key) {
        return getEntry(key) != null;
    }

    @Override
    public Entry<?> getEntry(String key) {
        for (Entry<?> entry : this) {
            if (entry.getKey().equals(key)) {
                return entry;
            }
        }
        return null;
    }

    @Override
    public int size() {
        if (cachedSize == -1) {
            cachedSize = Iterables.size(this);
        }
        assert cachedSize >= 0;
        return cachedSize;
    }

}