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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 2015-2017 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 Function condition in building condition expression.
 * 

* Underlying grammar: * *

 * function ::=
 *    attribute_exists (path)
 *  | attribute_not_exists (path)
 *  | begins_with (path, operand)
 *  | contains (path, operand)
 * 
*

* This object is as immutable (or unmodifiable) as the underlying operand. */ @Beta public final class FunctionCondition extends Condition { private final String functionId; private final PathOperand pathOperand; private final Operand operand; FunctionCondition(String functionId, PathOperand attribute) { this.functionId = functionId; this.pathOperand = attribute; this.operand = null; } FunctionCondition(String functionId, PathOperand attribute, Operand operand) { this.functionId = functionId; this.pathOperand = attribute; this.operand = operand; } @Override String asSubstituted(SubstitutionContext context) { StringBuilder sb = new StringBuilder(functionId).append("(").append( pathOperand.asSubstituted(context)); if (operand != null) sb.append(", ").append(operand.asSubstituted(context)); return sb.append(")").toString(); } String getFunctionId() { return functionId; } PathOperand getPathOperand() { return pathOperand; } Operand getOperand() { return operand; } @Override boolean atomic() { return true; } @Override int precedence() { return Precedence.Function.value(); } }





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