com.amazonaws.internal.BoundedLinkedHashMap Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of aws-java-sdk-osgi Show documentation

The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

There is a newer version: 1.11.60

Show newest version

/*
 * Copyright 2014-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.internal;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * A bounded linked hash map that would remove the eldest entry when the map
 * size exceeds a configurable maximum.
 */
final class BoundedLinkedHashMap extends LinkedHashMap {
    private static final long serialVersionUID = 1L;
    private final int maxSize;
    BoundedLinkedHashMap(int maxSize) {
        this.maxSize = maxSize;
    }

    /**
     * {@inheritDoc}
     * 
     * Returns true if the size of this map exceeds the maximum.
     */
    @Override
    protected boolean removeEldestEntry(Map.Entry eldest) {
        return size() > maxSize;
    }

    /**
     * Returns the maximum size of this map beyond which the eldest entry
     * will get removed.
     */
    int getMaxSize() {
        return maxSize;
    }
}