SimplePathInterpreter (Apache Commons JXPath 1.4-SNAPSHOT API)

java.lang.Object
- org.apache.commons.jxpath.ri.axes.SimplePathInterpreter

```
public class SimplePathInterpreter
extends Object
```
An evaluation mechanism for simple XPaths, which is much faster than the usual process. It is only used for xpaths which have no context-dependent parts, consist entirely of child::name and self::node() steps with predicates that either integer or have the form [@name = ...].

Version:

$Revision: 652845 $ $Date: 2008-05-02 19:46:46 +0200 (Fr, 02 Mai 2008) $

Author:

Dmitri Plotnikov

Constructor Summary

Constructors
Constructor and Description

SimplePathInterpreter()

Constructors
Constructor and Description
`SimplePathInterpreter()`

Method Summary

Methods
Modifier and Type	Method and Description
`static NodePointer`	`createNullPointer(EvalContext context, NodePointer parent, Step[] steps, int currentStep)` Creates a "null pointer" that a) represents the requested path and b) can be used for creation of missing nodes in the path.
`static NodePointer`	`interpretSimpleExpressionPath(EvalContext context, NodePointer root, Expression[] predicates, Step[] steps)` Interpret the steps of a simple expression path that starts with the given root, which is the result of evaluation of the root expression of the expression path, applies the given predicates to it and then follows the given steps.
`static NodePointer`	`interpretSimpleLocationPath(EvalContext context, NodePointer root, Step[] steps)` Interpret a simple path that starts with the given root and follows the given steps.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SimplePathInterpreter
```
public SimplePathInterpreter()
```
- Method Detail
  - interpretSimpleLocationPath
```
public static NodePointer interpretSimpleLocationPath(EvalContext context,
                                      NodePointer root,
                                      Step[] steps)
```
    Interpret a simple path that starts with the given root and follows the given steps. All steps must have the axis "child::" and a name test. They can also optionally have predicates of type [@name=expression] or simply [expression] interpreted as an index.
    
    Parameters:
    context - evaluation context
    root - root pointer
    steps - path steps
    
    Returns:
    NodePointer
  - interpretSimpleExpressionPath
```
public static NodePointer interpretSimpleExpressionPath(EvalContext context,
                                        NodePointer root,
                                        Expression[] predicates,
                                        Step[] steps)
```
    Interpret the steps of a simple expression path that starts with the given root, which is the result of evaluation of the root expression of the expression path, applies the given predicates to it and then follows the given steps. All steps must have the axis "child::" or "attribute::" and a name test. They can also optionally have predicates of type [@name=...] or simply [...] interpreted as an index.
    
    Parameters:
    context - evaluation context
    root - root pointer
    predicates - predicates corresponding to steps
    steps - path steps
    
    Returns:
    NodePointer
  - createNullPointer
```
public static NodePointer createNullPointer(EvalContext context,
                            NodePointer parent,
                            Step[] steps,
                            int currentStep)
```
    Creates a "null pointer" that a) represents the requested path and b) can be used for creation of missing nodes in the path.
    
    Parameters:
    context - evaluation context
    parent - parent pointer
    steps - path steps
    currentStep - step number
    
    Returns:
    NodePointer

Class SimplePathInterpreter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SimplePathInterpreter

Method Detail

interpretSimpleLocationPath

interpretSimpleExpressionPath

createNullPointer