org.oreodata.predicates
Class Predicates

java.lang.Object
  |
  +--org.oreodata.predicates.Predicates

public class Predicates

extends java.lang.Object

Holder for factory methods for predicate objects.

See Also:

RecordFilter

Field Summary

static Predicate	IS_CHILD_PREDICATE
static Predicate	IS_ROOT_PREDICATE
static RecordFilter	NULL_FILTER A trivial RecordFilter that simply accepts anything.

Constructor Summary

Predicates()

Method Summary

static Predicate	getEqualityPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue) this is equivalent to getEqualityPredicate(recType, fieldName, comparisonValue, false)
static Predicate	getEqualityPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, boolean caseInsensitive)
static Predicate	getGreaterThanEqualsPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue)
static Predicate	getGreaterThanEqualsPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, java.util.Comparator comparator)
static Predicate	getGreaterThanPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue)
static Predicate	getGreaterThanPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, java.util.Comparator comparator)
static Predicate	getInequalityPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue) this is equivalent to getInequalityPredicate(recType, fieldName, comparisonValue, false)
static Predicate	getInequalityPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, boolean caseInsensitive)
static Predicate	getIntersection(Predicate lhs, Predicate rhs)
static Predicate	getLessThanEqualsPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue)
static Predicate	getLessThanEqualsPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, java.util.Comparator comparator)
static Predicate	getLessThanPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue)
static Predicate	getLessThanPredicate(java.lang.String recType, java.lang.String fieldName, java.lang.Object comparisonValue, java.util.Comparator comparator)
static Predicate	getLikePredicate(java.lang.String recType, java.lang.String fieldName, java.lang.String comparisonValue, boolean caseInsensitive)
static Predicate	getNotLikePredicate(java.lang.String recType, java.lang.String fieldName, java.lang.String comparisonValue, boolean caseInsensitive)
static Predicate	getUnion(Predicate lhs, Predicate rhs)

Methods inherited from class java.lang.Object

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

Field Detail

NULL_FILTER

public static final RecordFilter NULL_FILTER

A trivial RecordFilter that simply accepts anything.

IS_ROOT_PREDICATE

public static final Predicate IS_ROOT_PREDICATE

IS_CHILD_PREDICATE

public static final Predicate IS_CHILD_PREDICATE

Constructor Detail

Predicates

public Predicates()

Method Detail

getEqualityPredicate

public static Predicate getEqualityPredicate(java.lang.String recType,
                                             java.lang.String fieldName,
                                             java.lang.Object comparisonValue)

this is equivalent to getEqualityPredicate(recType, fieldName, comparisonValue, false)

getEqualityPredicate

public static Predicate getEqualityPredicate(java.lang.String recType,
                                             java.lang.String fieldName,
                                             java.lang.Object comparisonValue,
                                             boolean caseInsensitive)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

caseInsensitive - whether to perform a case-insensitive match

Returns:

A predicate that represents all records of a given type whose given field has the given a value.
If caseInsensitive is true, the comparisonValue must be a string (of course!)

getInequalityPredicate

public static Predicate getInequalityPredicate(java.lang.String recType,
                                               java.lang.String fieldName,
                                               java.lang.Object comparisonValue,
                                               boolean caseInsensitive)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

caseInsensitive - whether to do a case-insensitive match.

Returns:

A predicate that represents all records of a given type whose given field is not of the given value.
If caseInsensitive is true, the comparisonValue must be a string (of course!)

getInequalityPredicate

public static Predicate getInequalityPredicate(java.lang.String recType,
                                               java.lang.String fieldName,
                                               java.lang.Object comparisonValue)

this is equivalent to getInequalityPredicate(recType, fieldName, comparisonValue, false)

getLessThanPredicate

public static Predicate getLessThanPredicate(java.lang.String recType,
                                             java.lang.String fieldName,
                                             java.lang.Object comparisonValue)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

Returns:

A predicate that represents all records of a given type whose given field is less than the given value.

getLessThanPredicate

public static Predicate getLessThanPredicate(java.lang.String recType,
                                             java.lang.String fieldName,
                                             java.lang.Object comparisonValue,
                                             java.util.Comparator comparator)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

comparator - A custom comparator to use for comparisons

Returns:

A predicate that represents all records of a given type whose given field is less than the given value.

getGreaterThanPredicate

public static Predicate getGreaterThanPredicate(java.lang.String recType,
                                                java.lang.String fieldName,
                                                java.lang.Object comparisonValue)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

Returns:

A predicate that represents all records of a given type whose given field is greater than the given value.

getGreaterThanPredicate

public static Predicate getGreaterThanPredicate(java.lang.String recType,
                                                java.lang.String fieldName,
                                                java.lang.Object comparisonValue,
                                                java.util.Comparator comparator)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

comparator - A custom comparator to use for comparisons

Returns:

A predicate that represents all records of a given type whose given field is greater than the given value.

getLessThanEqualsPredicate

public static Predicate getLessThanEqualsPredicate(java.lang.String recType,
                                                   java.lang.String fieldName,
                                                   java.lang.Object comparisonValue)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

Returns:

A predicate that represents all records of a given type whose given field is less than or equal to the given value.

getLessThanEqualsPredicate

public static Predicate getLessThanEqualsPredicate(java.lang.String recType,
                                                   java.lang.String fieldName,
                                                   java.lang.Object comparisonValue,
                                                   java.util.Comparator comparator)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

comparator - A custom comparator to use for comparisons

Returns:

A predicate that represents all records of a given type whose given field is less than or equal to the given value.

getGreaterThanEqualsPredicate

public static Predicate getGreaterThanEqualsPredicate(java.lang.String recType,
                                                      java.lang.String fieldName,
                                                      java.lang.Object comparisonValue)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

Returns:

A predicate that represents all records of a given type whose given field is greater than or equal to the given value.

getGreaterThanEqualsPredicate

public static Predicate getGreaterThanEqualsPredicate(java.lang.String recType,
                                                      java.lang.String fieldName,
                                                      java.lang.Object comparisonValue,
                                                      java.util.Comparator comparator)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The value to compare that field's value with.

comparator - A custom comparator to use for comparisons

Returns:

A predicate that represents all records of a given type whose given field is greater than or equal to the given value.

getLikePredicate

public static Predicate getLikePredicate(java.lang.String recType,
                                         java.lang.String fieldName,
                                         java.lang.String comparisonValue,
                                         boolean caseInsensitive)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The string to compare with

caseInsensitive - whether to do a case-insensitive match.

Returns:

A predicate that represents all records of a given type whose given field is greater than or equal to the given value.

getNotLikePredicate

public static Predicate getNotLikePredicate(java.lang.String recType,
                                            java.lang.String fieldName,
                                            java.lang.String comparisonValue,
                                            boolean caseInsensitive)

Parameters:

recType - The type of record we are interested in.

fieldName - The name of the field of the record we are filtering on.

comparisonValue - The string to compare with

caseInsensitive - whether to do a case-insensitive match.

Returns:

A predicate that represents all records of a given type whose given field is greater than or equal to the given value.

getIntersection

public static Predicate getIntersection(Predicate lhs,
                                        Predicate rhs)

Parameters:

lhs - left-hand side

rhs - right-hand side

Returns:

A predicate that represents the intersection of the two conditions. A logical AND

getUnion

public static Predicate getUnion(Predicate lhs,
                                 Predicate rhs)

Parameters:

lhs - left-hand side

rhs - right-hand side

Returns:

A predicate that represents the union of the two conditions. A logical OR