org.apache.metamodel.query

Class FilterClause

java.lang.Object

org.apache.metamodel.util.BaseObject

org.apache.metamodel.query.AbstractQueryClause<FilterItem>

org.apache.metamodel.query.FilterClause

All Implemented Interfaces:

Serializable, QueryClause<FilterItem>

public class FilterClause
extends AbstractQueryClause<FilterItem>

Represents a clause of filters in the query. This type of clause is used for the WHERE and HAVING parts of an SQL query. Each provided FilterItem will be evaluated with the logical AND operator, which requires that all filters are applied. Alternatively, if you wan't to use an OR operator, then use the appropriate constructor of FilterItem to create a composite filter.

See Also:

FilterItem, Serialized Form

Field Summary

Fields inherited from class org.apache.metamodel.query.AbstractQueryClause

DELIM_AND, DELIM_COMMA, PREFIX_FROM, PREFIX_GROUP_BY, PREFIX_HAVING, PREFIX_ORDER_BY, PREFIX_SELECT, PREFIX_WHERE

Constructor Summary

Constructors

Constructor and Description
FilterClause(Query query, String prefix)

Method Summary

Modifier and Type	Method and Description
List<SelectItem>	getEvaluatedSelectItems()
boolean	isColumnReferenced(Column column) Traverses the items and evaluates whether or not the given column is referenced in either of them.

Methods inherited from class org.apache.metamodel.query.AbstractQueryClause

addItem, addItem, addItems, addItems, decorateIdentity, getItem, getItemCount, getItems, indexOf, isEmpty, removeItem, removeItem, removeItems, setItems, toSql, toSql, toString

Methods inherited from class org.apache.metamodel.util.BaseObject

classEquals, equals, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FilterClause

public FilterClause(Query query,
                    String prefix)

Method Detail

getEvaluatedSelectItems

public List<SelectItem> getEvaluatedSelectItems()

isColumnReferenced

public boolean isColumnReferenced(Column column)

Traverses the items and evaluates whether or not the given column is referenced in either of them.

Parameters:

column -

Returns:

true if the column is referenced in the clause or false if not