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/*
*
* Copyright (c) 2013,2019 AT&T Knowledge Ventures
* SPDX-License-Identifier: MIT
*/
package com.att.research.xacmlatt.pdp.std.functions;
import java.util.ArrayList;
import java.util.List;
import com.att.research.xacml.api.DataType;
import com.att.research.xacml.api.Identifier;
import com.att.research.xacml.api.Status;
import com.att.research.xacml.std.StdStatus;
import com.att.research.xacml.std.StdStatusCode;
import com.att.research.xacml.std.datatypes.DataTypes;
import com.att.research.xacml.std.datatypes.ISO8601Time;
import com.att.research.xacmlatt.pdp.eval.EvaluationContext;
import com.att.research.xacmlatt.pdp.policy.ExpressionResult;
import com.att.research.xacmlatt.pdp.policy.FunctionArgument;
/**
* FunctionDefinitionTimeInRange implements {@link com.att.research.xacmlatt.pdp.policy.FunctionDefinition} to
* implement the XACML time-in-range predicates as a function taking three arguments of type Time
* and returning a Boolean.
*
* In the first implementation of XACML we had separate files for each XACML Function.
* This release combines multiple Functions in fewer files to minimize code duplication.
* This file supports the following XACML codes:
* time-in-range
*
*
* @author glenngriffin
* @version $Revision: 1.1 $
*
* @param the java class for the data type of the function Input arguments.
*/
public class FunctionDefinitionTimeInRange extends FunctionDefinitionHomogeneousSimple {
/**
* Constructor - need dataType input because of java Generic type-erasure during compilation.
*
* @param idIn Identifier
* @param dataTypeArgsIn DataType arguments
*/
public FunctionDefinitionTimeInRange(Identifier idIn, DataType dataTypeArgsIn) {
super(idIn, DataTypes.DT_BOOLEAN, dataTypeArgsIn, 3);
}
@Override
public ExpressionResult evaluate(EvaluationContext evaluationContext, List arguments) {
List convertedArguments = new ArrayList<>();
Status status = this.validateArguments(arguments, convertedArguments);
/*
* If the function arguments are not correct, just return an error status immediately
*/
if (!status.getStatusCode().equals(StdStatusCode.STATUS_CODE_OK)) {
return ExpressionResult.newError(getFunctionStatus(status));
}
int compareResultLow;
int compareResultHigh;
try {
compareResultLow = ((ISO8601Time) convertedArguments.get(1)).compareTo((ISO8601Time)convertedArguments.get(0));
compareResultHigh = ((ISO8601Time)convertedArguments.get(2)).compareTo((ISO8601Time)convertedArguments.get(0));
} catch (Exception e) {
String message = e.getMessage();
if (e.getCause() != null) {
message = e.getCause().getMessage();
}
return ExpressionResult.newError(new StdStatus(StdStatusCode.STATUS_CODE_PROCESSING_ERROR, this.getShortFunctionId() + " " + message));
}
// is arg 0 within the inclusive range of the other two?
if (compareResultLow <=0 && compareResultHigh >= 0) {
return ER_TRUE;
} else {
return ER_FALSE;
}
}
}