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The AWS Java SDK for Amazon DynamoDB module holds the client classes that are used for communicating with Amazon DynamoDB Service

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/*
 * Copyright 2015-2021 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;

/**
 * Represents an update action for building update expression.
 * 

* This object is as immutable (or unmodifiable) as the underlying value (of * type UnitOfExpression) given during construction. */ @Beta public abstract class UpdateAction extends UnitOfExpression { private final String operator; private final PathOperand attribute; private final UnitOfExpression value; UpdateAction(String operator, PathOperand attribute, UnitOfExpression value) { this.operator = operator; this.attribute = attribute; this.value = value; } /** * Returns the attribute as a string, substituted if necessary with tokens * using the given substitution context. */ @Override String asSubstituted(SubstitutionContext context) { return value == null ? attribute.asSubstituted(context) : attribute.asSubstituted(context) + " " + value.asSubstituted(context); } final String getOperator() { return operator; } final PathOperand getPathOperand() { return attribute; } final UnitOfExpression getValue() { return value; } }





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