jd.xml.xpath.expr
Class BooleanExpression

java.lang.Object
  jd.xml.xpath.expr.ExpressionImpl
      jd.xml.xpath.expr.BooleanExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

BooleanFunction, BooleanOperator

public abstract class BooleanExpression

extends ExpressionImpl

BooleanExpression is an expression which evaluates to a boolean.

Field Summary

Fields inherited from interface jd.xml.xpath.expr.Expression

DEP_CONTEXT_NODE, DEP_CONTEXT_POSITION, DEP_CONTEXT_SIZE, DEP_CONTEXT_STATIC, DEP_NONE, DEP_UNKNOWN

Constructor Summary

BooleanExpression()

Method Summary

int	getResultType() Return XObject.TYPE_BOOLEAN.
abstract boolean	toBooleanValue(XPathContext context) Evaluate the Expression to a boolean.
double	toNumberValue(XPathContext context) Evaluate the Expression to a number.
String	toStringValue(XPathContext context) Evaluate the Expression to a String.
XObject	toXObject(XPathContext context) Evaluate the expression.

Methods inherited from class jd.xml.xpath.expr.ExpressionImpl

hasContextDependencies, isUniqueFilter, matchesFilter, toNode, toNodeSet, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface jd.xml.xpath.expr.Expression

accept, getContextDependencies

Constructor Detail

BooleanExpression

public BooleanExpression()

Method Detail

getResultType

public final int getResultType()

Return XObject.TYPE_BOOLEAN.

toXObject

public XObject toXObject(XPathContext context)

Evaluate the expression.

Parameters:

context - the evaluation context

toStringValue

public String toStringValue(XPathContext context)

Evaluate the Expression to a String.

Parameters:

context - the evaluation context

toNumberValue

public double toNumberValue(XPathContext context)

Evaluate the Expression to a number.

Parameters:

context - the evaluation context

toBooleanValue

public abstract boolean toBooleanValue(XPathContext context)

Evaluate the Expression to a boolean.

Parameters:

context - the evaluation context