com.amazonaws.services.dynamodbv2.xspec.SetAction Maven / Gradle / Ivy
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/*
* Copyright 2015-2020 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 a SET action in the SET section of an update expression.
*
* A SET action is used to add one or more attributes and values to an item. If
* any of these attribute already exist, they are replaced by the new values.
*
* This object is as immutable (or unmodifiable) as the underlying value (of
* type UnitOfExpression) given during construction.
*/
@Beta
public final class SetAction extends UpdateAction {
SetAction(PathOperand attr, UnitOfExpression value) {
super("SET", attr, value);
}
/**
* Returns the operand for this update expression as a string, substituted
* if necessary with tokens using the given substitution context.
*/
@Override
String asSubstituted(SubstitutionContext context) {
return new StringBuilder(getPathOperand().asSubstituted(context))
.append(" = ").append(getValue().asSubstituted(context))
.toString();
}
}