com.amazonaws.services.dynamodbv2.xspec.ArrayIndexElement Maven / Gradle / Ivy

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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).

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/*
 * Copyright 2015-2016 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.services.dynamodbv2.xspec;

import org.apache.http.annotation.Immutable;

@Immutable
final class ArrayIndexElement extends PathElement {

    private final int index;

    public ArrayIndexElement(int index) {
        if (index < 0) {
            throw new IllegalArgumentException(
                    "Invalid array index: " + index);
        }
        this.index = index;
    }

    @Override
    public String toString() {
        return "[" + index + "]";
    }

    @Override
    public int hashCode() {
        return index;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof ArrayIndexElement)) {
            return false;
        }

        return (index == ((ArrayIndexElement) obj).index);
    }

    @Override
    String asNestedPath() {
        return "[" + index + "]";
   }
   
    @Override
    String asToken(SubstitutionContext context) {
        throw new IllegalStateException();
    }

    @Override
    String asNestedToken(SubstitutionContext context) {
        return asNestedPath();
    }
}