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java.lang.Objectorg.apache.commons.jxpath.ri.compiler.Expression
org.apache.commons.jxpath.ri.compiler.Path
org.apache.commons.jxpath.ri.compiler.ExpressionPath
public class ExpressionPath
An element of the parse tree that represents an expression path, which is a
path that starts with an expression like a function call: getFoo(.)
/bar
.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.commons.jxpath.ri.compiler.Expression |
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Expression.PointerIterator, Expression.ValueIterator |
Field Summary |
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Fields inherited from class org.apache.commons.jxpath.ri.compiler.Expression |
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NOT_A_NUMBER, ONE, ZERO |
Constructor Summary | |
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ExpressionPath(Expression expression,
Expression[] predicates,
Step[] steps)
Create a new ExpressionPath. |
Method Summary | |
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java.lang.Object |
compute(EvalContext context)
Evaluates the expression. |
boolean |
computeContextDependent()
Returns true if the root expression or any of the predicates or the path steps are context dependent. |
java.lang.Object |
computeValue(EvalContext context)
Evaluates the expression. |
protected java.lang.Object |
expressionPath(EvalContext evalContext,
boolean firstMatch)
Walks an expression path (a path that starts with an expression) |
Expression |
getExpression()
Get the expression. |
Expression[] |
getPredicates()
Predicates are the expressions in brackets that may follow the root expression of the path. |
boolean |
isSimpleExpressionPath()
Recognized paths formatted as $x[3]/foo[2] . |
java.lang.String |
toString()
|
Methods inherited from class org.apache.commons.jxpath.ri.compiler.Path |
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areBasicPredicates, buildContextChain, createContextForStep, evalSteps, getSingleNodePointerForSteps, getSteps, isSimplePath, isSimpleStep, searchForPath |
Methods inherited from class org.apache.commons.jxpath.ri.compiler.Expression |
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isContextDependent, iterate, iteratePointers |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ExpressionPath(Expression expression, Expression[] predicates, Step[] steps)
expression
- Expressionpredicates
- to executesteps
- navigationMethod Detail |
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public Expression getExpression()
public Expression[] getPredicates()
public boolean computeContextDependent()
computeContextDependent
in class Path
public boolean isSimpleExpressionPath()
$x[3]/foo[2]
. The
evaluation of such "simple" paths is optimized and streamlined.
public java.lang.String toString()
toString
in class java.lang.Object
public java.lang.Object compute(EvalContext context)
Expression
compute
in class Expression
context
- evaluation context
public java.lang.Object computeValue(EvalContext context)
Expression
computeValue
in class Expression
context
- evaluation context
protected java.lang.Object expressionPath(EvalContext evalContext, boolean firstMatch)
evalContext
- base contextfirstMatch
- whether to return the first match found
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