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oracle.webcenter.search.util
Class PredicateUtils

java.lang.Object
oracle.webcenter.search.util.PredicateUtils

public class PredicateUtils

extends java.lang.Object

This class provides some utility methods around Predicates that developers may find useful.

Since:

11.1.1.0.0 Beta 2

Constructor Summary

PredicateUtils()

Method Summary

static void	convertAllSinceNumDaysComparator(Predicate predicate) Convert all SinceNumDays comparators and their operands in the predicate tree
static void	filterTextPredicate(Predicate predicate, java.lang.String filterString) Filter text predicate by the filterString
static <T extends Predicate> java.util.List<T>	findPredicates(java.lang.Class<T> type, Predicate predicate) Returns a list of Predicates that matches the class passed in.
static void	flatten(ComplexPredicate predicate) Compacts the ComplexPredicate by flattening.
static <T extends Predicate> Predicate	getFirst(java.lang.Class<T> type, Predicate predicate) Extracts the first Predicate it finds in the descendents of a Predicate that matches the type passed in.
static java.lang.String	getFirstKeywordsFromPredicate(Predicate predicate) Extracts the first keywords it finds in the Predicate by looking into TextPredicates.

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateUtils

public PredicateUtils()

Method Detail

getFirstKeywordsFromPredicate

public static final java.lang.String getFirstKeywordsFromPredicate(Predicate predicate)

Extracts the first keywords it finds in the Predicate by looking into TextPredicates.

Parameters:

predicate - a Predicate that can be either Text of Complex.

Returns:

the first string in navigating down the Predicate.

getFirst

public static final <T extends Predicate> Predicate getFirst(java.lang.Class<T> type,
                                                             Predicate predicate)

Extracts the first Predicate it finds in the descendents of a Predicate that matches the type passed in.

Parameters:

type - The Class object we want to match from the descendents of the passed in predicate

predicate - the Predicate whose descendents (via ComplexPredicate) we wish to discover Predicates of the type passed in

Returns:

the first item in a List of Predicates that matches the type criterion

findPredicates

public static final <T extends Predicate> java.util.List<T> findPredicates(java.lang.Class<T> type,
                                                                           Predicate predicate)

Returns a list of Predicates that matches the class passed in.

Parameters:

type - The Class object we want to match from the descendents of the passed in predicate

predicate - the Predicate whose descendents (via ComplexPredicate) we wish to discover Predicates of the type passed in

Returns:

a List of Predicates that matches the type criterion

flatten

public static final void flatten(ComplexPredicate predicate)

Compacts the ComplexPredicate by flattening. This means, collapsing any unnecessary hierarchies of ANDs and ORs if they are the same.

Parameters:

predicate - the ComplexPredicate to be flattened

convertAllSinceNumDaysComparator

public static void convertAllSinceNumDaysComparator(Predicate predicate)

Convert all SinceNumDays comparators and their operands in the predicate tree

Parameters:

predicate - of the query

filterTextPredicate

public static void filterTextPredicate(Predicate predicate,
                                       java.lang.String filterString)

Filter text predicate by the filterString

Parameters:

predicate - of the query

filterString -

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