Package org.qdl_lang.variables.values

Class QDLNullValue

java.lang.Object

org.qdl_lang.variables.values.QDLValue

org.qdl_lang.variables.values.QDLNullValue

All Implemented Interfaces:

Serializable, Comparable<QDLValue>, Constants

public class QDLNullValue
extends QDLValue

Since there is a single instance of the QDLNull, there needs to be a dedicated class for it that sidesteps some bootstrapping issues.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.qdl_lang.variables.values.QDLValue

axisValue, booleanValue, decimalValue, dyadicFunctionValue, functionValue, longValue, moduleValue, nullValue, setValue, stemValue, stringValue

Fields inherited from interface org.qdl_lang.variables.Constants

ALL_INDICES_NAME, ALL_INDICES_TYPE, ARG_COUNT_TYPE, AXIS_RESTRICTION_NAME, AXIS_RESTRICTION_TYPE, BOOLEAN_NAME, BOOLEAN_TYPE, DECIMAL_NAME, DECIMAL_TYPE, DYADIC_FUNCTION_NAME, DYADIC_FUNCTION_TYPE, FUNCTION_NAME, FUNCTION_TYPE, INTEGER_TYPE, LIST_NAME, LIST_TYPE, LONG_NAME, LONG_TYPE, MODULE_NAME, MODULE_TYPE, NULL_NAME, NULL_TYPE, SET_NAME, SET_TYPE, STEM_NAME, STEM_TYPE, STRING_NAME, STRING_TYPE, UNKNOWN_NAME, UNKNOWN_TYPE

Constructor Summary

Constructors

Constructor	Description
QDLNullValue()

Method Summary

Methods inherited from class org.qdl_lang.variables.values.QDLValue

asAxisExpression, asBoolean, asDecimal, asDyadicFunction, asFunction, asJavaValue, asLong, asModule, asNull, asQDLValue, asSet, asStem, asString, castToJavaValues, castToJavaValues, castToQDLValueList, castToQDLValues, castToQDLValues, castToQDLValues, castToQDLValues, compareTo, equals, getInputForm, getNullValue, getType, getValue, hashCode, hasValue, isAllIndices, isAxisRestriction, isBoolean, isDecimal, isDyadicFunction, isFunction, isList, isListOrStem, isLong, isModule, isNull, isScalar, isSet, isStem, isString, setValue, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

QDLNullValue

public QDLNullValue()