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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 Technologies, Inc.
 *
 * 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://aws.amazon.com/apache2.0
 *
 * 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 com.amazonaws.annotation.Beta;

/**
 * An explicitly parenthesized condition, ie '(' condition ')', used in building
 * condition expressions.
 * 
 * This object is as immutable (or unmodifiable) as the underlying condition.
 */
@Beta
public final class ParenthesizedCondition extends Condition {
    private final Condition condition;

    /**
     * Returns a parenthesized condition for the given condition if the given
     * condition is not already a parenthesized condition; or the original
     * condition otherwise.
     */
    public static ParenthesizedCondition getInstance(Condition condition) {
        return condition instanceof ParenthesizedCondition ? (ParenthesizedCondition) condition
                : new ParenthesizedCondition(condition);
    }

    private ParenthesizedCondition(Condition condition) {
        this.condition = condition;
    }

    @Override
    String asSubstituted(SubstitutionContext context) {
        return "(" + condition.asSubstituted(context) + ")";
    }

    @Override
    boolean atomic() {
        return true;
    }

    @Override
    int precedence() {
        return Precedence.Parentheses.value();
    }
}