org.kuali.rice.krad.uif.util

Class ObjectPathExpressionParser

java.lang.Object

org.kuali.rice.krad.uif.util.ObjectPathExpressionParser

public final class ObjectPathExpressionParser
extends Object

Provides modular support parsing path expressions using Spring's BeanWrapper expression Syntax. (see The Spring Manual)

Author:

Kuali Rice Team (rice.collab@kuali.org)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ObjectPathExpressionParser.PathEntry Path entry interface for use with parsePathExpression(Object, String, PathEntry).

Method Summary

Modifier and Type	Method and Description
static int	indexOfCloseBracket(String path, int leftBracketIndex) Return the index of the close bracket that matches the bracket at the start of the path.
static boolean	isPath(String propertyName) Determine if a property name is a path or a plain property reference.
static <T> T	parsePathExpression(Object root, String path, ObjectPathExpressionParser.PathEntry pathEntry) Parse a path expression.

Methods inherited from class java.lang.Object

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

Method Detail

indexOfCloseBracket

public static int indexOfCloseBracket(String path,
                                      int leftBracketIndex)

Return the index of the close bracket that matches the bracket at the start of the path.

Parameters:

path - The string to scan.

leftBracketIndex - The index of the left bracket.

Returns:

The index of the right bracket that matches the left bracket at index given. If the path does not begin with an open bracket, then -1 is returned.

isPath

public static boolean isPath(String propertyName)

Determine if a property name is a path or a plain property reference.

This method is used to eliminate parsing and object creation overhead when resolving an object property reference with a non-complex property path.

Parameters:

propertyName - property name

Returns:

true if the name is a path, false if a plain reference

parsePathExpression

public static <T> T parsePathExpression(Object root,
                                        String path,
                                        ObjectPathExpressionParser.PathEntry pathEntry)

Parse a path expression.

Parameters:

root - The root object.

path - The path expression.

pathEntry - The path entry adaptor to use for processing parse node transition.

Returns:

The valid of the bean property indicated by the given path expression, null if the path expression doesn't resolve to a valid property.

See Also:

ObjectPropertyUtils.getPropertyValue(Object, String)