com.amazonaws.services.dynamodbv2.xspec.FunctionCondition Maven / Gradle / Ivy
/*
* 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 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();
}
}