org.apache.xpath.operations
Class Bool

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.operations.UnaryOperation
              |
              +--org.apache.xpath.operations.Bool

public class Bool

extends UnaryOperation

The 'boolean()' operation expression executer.

See Also:

Serialized Form

Constructor Summary

Bool()

Method Summary

boolean	bool(XPathContext xctxt) Evaluate this operation directly to a boolean.
XObject	operate(XObject right) Apply the operation to two operands, and return the result.

Methods inherited from class org.apache.xpath.operations.UnaryOperation

callVisitors, canTraverseOutsideSubtree, deepEquals, execute, fixupVariables, getExpression, getOperand, setExpression, setRight

Methods inherited from class org.apache.xpath.Expression

asIterator, asIteratorRaw, asNode, assertion, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Bool

public Bool()

Method Detail

operate

public XObject operate(XObject right)
                throws TransformerException

Apply the operation to two operands, and return the result.

Parameters:

right - non-null reference to the evaluated right operand.

Returns:

non-null reference to the XObject that represents the result of the operation.

Throws:

TransformerException -

Overrides:

operate in class UnaryOperation

bool

public boolean bool(XPathContext xctxt)
             throws TransformerException

Evaluate this operation directly to a boolean.

Parameters:

xctxt - The runtime execution context.

Returns:

The result of the operation as a boolean.

Throws:

TransformerException -

Overrides:

bool in class Expression