Package thredds.crawlabledataset.filter

Class LogicalFilterComposer

java.lang.Object

thredds.crawlabledataset.filter.LogicalFilterComposer

public class LogicalFilterComposer
extends Object

Build CrawlableDatasetFilters from other CrawlableDatasetFilters using logical composition (AND, OR, NOT).

For instance, the expression

 (A || B) && !(C && D)
 

can be expressed with the following code (assuming A, B, C, and D are CrawlableDatasetFilters)

 LogicalFilterComposer.getAndFilter(LogicalFilterComposer.getOrFilter(A, B),
     LogicalFilterComposer.getNotFilter(LogicalFilterComposer.getAndFilter(C, D)));
 

Since:

Jan 19, 2007 9:53:00 AM

Constructor Summary

Constructors

Constructor	Description
LogicalFilterComposer()

Method Summary

Modifier and Type	Method	Description
static CrawlableDatasetFilter	getAndFilter(CrawlableDatasetFilter filter1, CrawlableDatasetFilter filter2)
static CrawlableDatasetFilter	getNotFilter(CrawlableDatasetFilter filter)
static CrawlableDatasetFilter	getOrFilter(CrawlableDatasetFilter filter1, CrawlableDatasetFilter filter2)

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalFilterComposer

public LogicalFilterComposer()

Method Detail

getAndFilter

public static CrawlableDatasetFilter getAndFilter(CrawlableDatasetFilter filter1,
                                                  CrawlableDatasetFilter filter2)

getOrFilter

public static CrawlableDatasetFilter getOrFilter(CrawlableDatasetFilter filter1,
                                                 CrawlableDatasetFilter filter2)

getNotFilter

public static CrawlableDatasetFilter getNotFilter(CrawlableDatasetFilter filter)