Subtraction.java
/*
* Portions of this software was developed by employees of the National Institute
* of Standards and Technology (NIST), an agency of the Federal Government and is
* being made available as a public service. Pursuant to title 17 United States
* Code Section 105, works of NIST employees are not subject to copyright
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* copyright. Permission in the United States and in foreign countries, to the
* extent that NIST may hold copyright, to use, copy, modify, create derivative
* works, and distribute this software and its documentation without fee is hereby
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* of warranty appears in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
* EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
* THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
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package gov.nist.secauto.metaschema.core.metapath;
import gov.nist.secauto.metaschema.core.metapath.function.FunctionUtils;
import gov.nist.secauto.metaschema.core.metapath.function.OperationFunctions;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IAnyAtomicItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IDateItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IDateTimeItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IDayTimeDurationItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.INumericItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IYearMonthDurationItem;
import edu.umd.cs.findbugs.annotations.NonNull;
class Subtraction
extends AbstractBasicArithmeticExpression {
/**
* An expression that gets the difference of two atomic data items.
*
* @param minuend
* an expression whose result is the value being subtracted from
* @param subtrahend
* an expression whose result is the value being subtracted
*/
protected Subtraction(@NonNull IExpression minuend, @NonNull IExpression subtrahend) {
super(minuend, subtrahend);
}
@Override
public <RESULT, CONTEXT> RESULT accept(IExpressionVisitor<RESULT, CONTEXT> visitor, CONTEXT context) {
return visitor.visitSubtraction(this, context);
}
/**
* Get the difference of two atomic items.
*
* @param minuend
* the item being subtracted from
* @param subtrahend
* the item being subtracted
* @return the difference of the items or an empty {@link ISequence} if either
* item is {@code null}
*/
@Override
@NonNull
protected IAnyAtomicItem operation(@NonNull IAnyAtomicItem minuend, @NonNull IAnyAtomicItem subtrahend) {
return subtract(minuend, subtrahend);
}
/**
* Get the difference of two atomic items.
*
* @param minuend
* the item being subtracted from
* @param subtrahend
* the item being subtracted
* @return the difference of the items
*/
@NonNull
public static IAnyAtomicItem subtract(@NonNull IAnyAtomicItem minuend, // NOPMD - intentional
@NonNull IAnyAtomicItem subtrahend) {
IAnyAtomicItem retval = null;
if (minuend instanceof IDateItem) {
IDateItem left = (IDateItem) minuend;
if (subtrahend instanceof IDateItem) {
retval = OperationFunctions.opSubtractDates(left, (IDateItem) subtrahend);
} else if (subtrahend instanceof IYearMonthDurationItem) {
retval = OperationFunctions.opSubtractYearMonthDurationFromDate(left, (IYearMonthDurationItem) subtrahend);
} else if (subtrahend instanceof IDayTimeDurationItem) {
retval = OperationFunctions.opSubtractDayTimeDurationFromDate(left, (IDayTimeDurationItem) subtrahend);
}
} else if (minuend instanceof IDateTimeItem) {
IDateTimeItem left = (IDateTimeItem) minuend;
if (subtrahend instanceof IDateTimeItem) {
retval = OperationFunctions.opSubtractDateTimes(left, (IDateTimeItem) subtrahend);
} else if (subtrahend instanceof IYearMonthDurationItem) {
retval = OperationFunctions.opSubtractYearMonthDurationFromDateTime(left, (IYearMonthDurationItem) subtrahend);
} else if (subtrahend instanceof IDayTimeDurationItem) {
retval = OperationFunctions.opSubtractDayTimeDurationFromDateTime(left, (IDayTimeDurationItem) subtrahend);
}
} else if (minuend instanceof IYearMonthDurationItem) {
IYearMonthDurationItem left = (IYearMonthDurationItem) minuend;
if (subtrahend instanceof IYearMonthDurationItem) {
retval = OperationFunctions.opSubtractYearMonthDurations(left, (IYearMonthDurationItem) subtrahend);
}
} else if (minuend instanceof IDayTimeDurationItem) {
IDayTimeDurationItem left = (IDayTimeDurationItem) minuend;
if (subtrahend instanceof IDayTimeDurationItem) {
retval = OperationFunctions.opSubtractDayTimeDurations(left, (IDayTimeDurationItem) subtrahend);
}
} else {
// handle as numeric
INumericItem left = FunctionUtils.toNumeric(minuend);
INumericItem right = FunctionUtils.toNumeric(subtrahend);
retval = OperationFunctions.opNumericSubtract(left, right);
}
if (retval == null) {
throw new InvalidTypeMetapathException(
null,
String.format("The expression '%s - %s' is not supported", minuend.getClass().getName(),
subtrahend.getClass().getName()));
}
return retval;
}
}