org.teiid.language

Class LanguageUtil

java.lang.Object

org.teiid.language.LanguageUtil

public final class LanguageUtil
extends Object

Helpful utility methods to work with language interfaces.

Method Summary

Modifier and Type	Method and Description
static Condition	combineCriteria(Condition primaryCrit, Condition additionalCrit, LanguageFactory languageFactory) This utility method can be used to combine two criteria using an AND.
static Condition	combineCriteria(List<Condition> crits) Combines a list of conditions under a single AndOr
static List<Condition>	separateCriteriaByAnd(Condition criteria) Take a criteria, which may be null, a single IPredicateCriteria or a complex criteria built using ICompoundCriteria and breaks it apart at ANDs such that a List of ICriteria conjuncts are returned.

Methods inherited from class java.lang.Object

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

Method Detail

separateCriteriaByAnd

public static final List<Condition> separateCriteriaByAnd(Condition criteria)

Take a criteria, which may be null, a single IPredicateCriteria or a complex criteria built using ICompoundCriteria and breaks it apart at ANDs such that a List of ICriteria conjuncts are returned. For example, ((a=1 OR b=2) AND (c=3 AND d=4)) would return the list (a=1 OR b=2), c=3, d=4. If criteria is null, an empty list is returned.

Parameters:

criteria - Criteria to break, may be null

Returns:

List of ICriteria, never null

combineCriteria

public static Condition combineCriteria(Condition primaryCrit,
                                        Condition additionalCrit,
                                        LanguageFactory languageFactory)

This utility method can be used to combine two criteria using an AND. If both criteria are null, then null will be returned. If either is null, then the other will be returned.

Parameters:

primaryCrit - Primary criteria - may be modified

additionalCrit - Won't be modified, but will likely be attached to the returned crit

languageFactory - Will be used to construct new ICompoundCriteria if necessary

Returns:

Combined criteria

combineCriteria

public static Condition combineCriteria(List<Condition> crits)

Combines a list of conditions under a single AndOr

Parameters:

crits -

Returns: