org.apache.commons.jxpath.ri.compiler
Class CoreOperationNegate
java.lang.Object
|
+--org.apache.commons.jxpath.ri.compiler.Expression
|
+--org.apache.commons.jxpath.ri.compiler.Operation
|
+--org.apache.commons.jxpath.ri.compiler.CoreOperation
|
+--org.apache.commons.jxpath.ri.compiler.CoreOperationNegate
- public class CoreOperationNegate
- extends CoreOperation
Implementation of Expression for the operation unary "-".
- Version:
- $Revision: 1.1 $ $Date: 2003/01/19 23:59:24 $
- Author:
- Dmitri Plotnikov
Fields inherited from class org.apache.commons.jxpath.ri.compiler.Operation |
args |
Method Summary |
java.lang.Object |
computeValue(EvalContext context)
Evaluates the expression. |
protected int |
getPrecedence()
Computes the precedence of the operation. |
java.lang.String |
getSymbol()
Returns the XPath symbol for this operation, e.g. |
protected boolean |
isSymmetric()
Returns true if the operation is not sensitive to the order of arguments,
e.g. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
CoreOperationNegate
public CoreOperationNegate(Expression arg)
computeValue
public java.lang.Object computeValue(EvalContext context)
- Description copied from class:
Expression
- Evaluates the expression. If the result is a node set, returns
the first element of the node set.
- Overrides:
computeValue
in class CoreOperation
getPrecedence
protected int getPrecedence()
- Description copied from class:
CoreOperation
- Computes the precedence of the operation.
- Overrides:
getPrecedence
in class CoreOperation
isSymmetric
protected boolean isSymmetric()
- Description copied from class:
CoreOperation
- Returns true if the operation is not sensitive to the order of arguments,
e.g. "=", "and" etc, and false if it is, e.g. "<=", "div".
- Overrides:
isSymmetric
in class CoreOperation
getSymbol
public java.lang.String getSymbol()
- Description copied from class:
CoreOperation
- Returns the XPath symbol for this operation, e.g. "+", "div", etc.
- Overrides:
getSymbol
in class CoreOperation
Copyright © 2001-2003 Apache Software Foundation. All Rights Reserved.