com.webmethods.caf.faces.data

Class CollectionUtils.FilterExpression

java.lang.Object

com.webmethods.caf.faces.data.CollectionUtils.FilterExpression

Enclosing class:

CollectionUtils

public static class CollectionUtils.FilterExpression
extends Object

Filter expression constructed by a string for use by CollectionUtils.filter(Collection, FilterExpression, IFilterableValueDecorator) . The filter expression uses the standard common search keyword rules (* = wildcard, space = and, quotes = exact phrase).

Field Summary

Fields

Modifier and Type	Field and Description
protected List<Pattern>	m_patterns List<Pattern> of individual patterns
protected String	m_string Expression string.
protected static Pattern	RE_EMPTY Pattern for matching whitespace, stars, and quotes
protected static Pattern	RE_QUOTED Pattern for matching anything inside quotes (inclusive)
protected static Pattern	RE_WILDCARD Wildcard Pattern

Constructor Summary

Constructors

Constructor and Description
FilterExpression(String s) Creates a new filter expression object from the specified string.

Method Summary

Modifier and Type	Method and Description
void	filter(Collection<?> collection, CollectionUtils.IFilterableValueDecorator valueDecorator) Removes the items from the specified collection whose value does not match the filter.
String	getExpressionString() Expression string.
boolean	matches(String s) True if the specified string matches this expression.
void	setExpressionString(String s) Expression string.

Methods inherited from class java.lang.Object

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

Field Detail

RE_EMPTY

protected static Pattern RE_EMPTY

Pattern for matching whitespace, stars, and quotes

RE_QUOTED

protected static Pattern RE_QUOTED

Pattern for matching anything inside quotes (inclusive)

RE_WILDCARD

protected static Pattern RE_WILDCARD

Wildcard Pattern

m_string

protected String m_string

Expression string.

m_patterns

protected List<Pattern> m_patterns

List<Pattern> of individual patterns

Constructor Detail

FilterExpression

public FilterExpression(String s)

Creates a new filter expression object from the specified string.

Method Detail

getExpressionString

public String getExpressionString()

Expression string. May be null or empty ("").

setExpressionString

public void setExpressionString(String s)

Expression string. May be null or empty ("").

matches

public boolean matches(String s)

True if the specified string matches this expression.

filter

public void filter(Collection<?> collection,
                   CollectionUtils.IFilterableValueDecorator valueDecorator)

Removes the items from the specified collection whose value does not match the filter.

Parameters:

collection - Items to filter. The collection will be iterated, and the iterator's remove() method will be called for each item that does not match the filter.

valueDecorator - Decorator to use to calculate the value on which to filter for each item in the collection.