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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.criterion;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import org.hibernate.Session;
import org.hibernate.internal.util.collections.ArrayHelper;
import org.hibernate.type.Type;
/**
* The criterion package may be used by applications as a framework for building
* new kinds of Criterion. However, it is intended that most applications will
* simply use the built-in criterion types via the static factory methods of this class.
*
* @see org.hibernate.Criteria
* @see Projections factory methods for Projection instances
* @author Gavin King
*/
public class Restrictions {
Restrictions() {
//cannot be instantiated
}
/**
* Apply an "equal" constraint to the identifier property
* @param value
* @return Criterion
*/
public static Criterion idEq(Object value) {
return new IdentifierEqExpression(value);
}
/**
* Apply an "equal" constraint to the named property
* @param propertyName
* @param value
* @return SimpleExpression
*/
public static SimpleExpression eq(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, "=");
}
/**
* Apply an "equal" constraint to the named property. If the value
* is null, instead apply "is null".
* @param propertyName
* @param value
* @return Criterion
*/
public static Criterion eqOrIsNull(String propertyName, Object value) {
if (value == null) {
return isNull(propertyName);
}
return new SimpleExpression(propertyName, value, "=");
}
/**
* Apply a "not equal" constraint to the named property
* @param propertyName
* @param value
* @return SimpleExpression
*/
public static SimpleExpression ne(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, "<>");
}
/**
* Apply a "not equal" constraint to the named property. If the value
* is null, instead apply "is not null".
* @param propertyName
* @param value
* @return Criterion
*/
public static Criterion neOrIsNotNull(String propertyName, Object value) {
if (value == null) {
return isNotNull(propertyName);
}
return new SimpleExpression(propertyName, value, "<>");
}
/**
* Apply a "like" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression like(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, " like ");
}
/**
* Apply a "like" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression like(String propertyName, String value, MatchMode matchMode) {
return new SimpleExpression(propertyName, matchMode.toMatchString(value), " like " );
}
/**
* A case-insensitive "like", similar to Postgres ilike
* operator
*
* @param propertyName
* @param value
* @return Criterion
*/
public static Criterion ilike(String propertyName, String value, MatchMode matchMode) {
return new LikeExpression(propertyName, value, matchMode, null, true);
}
/**
* A case-insensitive "like", similar to Postgres ilike
* operator
*
* @param propertyName
* @param value
* @return Criterion
*/
public static Criterion ilike(String propertyName, Object value) {
if ( value == null ) {
throw new IllegalArgumentException( "Comparison value passed to ilike cannot be null" );
}
return ilike( propertyName, value.toString(), MatchMode.EXACT );
}
/**
* Apply a "greater than" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression gt(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, ">");
}
/**
* Apply a "less than" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression lt(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, "<");
}
/**
* Apply a "less than or equal" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression le(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, "<=");
}
/**
* Apply a "greater than or equal" constraint to the named property
* @param propertyName
* @param value
* @return Criterion
*/
public static SimpleExpression ge(String propertyName, Object value) {
return new SimpleExpression(propertyName, value, ">=");
}
/**
* Apply a "between" constraint to the named property
* @param propertyName
* @param lo value
* @param hi value
* @return Criterion
*/
public static Criterion between(String propertyName, Object lo, Object hi) {
return new BetweenExpression(propertyName, lo, hi);
}
/**
* Apply an "in" constraint to the named property
* @param propertyName
* @param values
* @return Criterion
*/
public static Criterion in(String propertyName, Object[] values) {
return new InExpression(propertyName, values);
}
/**
* Apply an "in" constraint to the named property
* @param propertyName
* @param values
* @return Criterion
*/
public static Criterion in(String propertyName, Collection values) {
return new InExpression( propertyName, values.toArray() );
}
/**
* Apply an "is null" constraint to the named property
* @return Criterion
*/
public static Criterion isNull(String propertyName) {
return new NullExpression(propertyName);
}
/**
* Apply an "equal" constraint to two properties
*/
public static PropertyExpression eqProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, "=");
}
/**
* Apply a "not equal" constraint to two properties
*/
public static PropertyExpression neProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, "<>");
}
/**
* Apply a "less than" constraint to two properties
*/
public static PropertyExpression ltProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, "<");
}
/**
* Apply a "less than or equal" constraint to two properties
*/
public static PropertyExpression leProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, "<=");
}
/**
* Apply a "greater than" constraint to two properties
*/
public static PropertyExpression gtProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, ">");
}
/**
* Apply a "greater than or equal" constraint to two properties
*/
public static PropertyExpression geProperty(String propertyName, String otherPropertyName) {
return new PropertyExpression(propertyName, otherPropertyName, ">=");
}
/**
* Apply an "is not null" constraint to the named property
* @return Criterion
*/
public static Criterion isNotNull(String propertyName) {
return new NotNullExpression(propertyName);
}
/**
* Return the conjuction of two expressions
*
* @param lhs
* @param rhs
* @return Criterion
*/
public static LogicalExpression and(Criterion lhs, Criterion rhs) {
return new LogicalExpression(lhs, rhs, "and");
}
/**
* Return the conjuction of multiple expressions
*
* @param predicates The predicates making up the initial junction
*
* @return The conjunction
*/
public static Conjunction and(Criterion... predicates) {
Conjunction conjunction = conjunction();
if ( predicates != null ) {
for ( Criterion predicate : predicates ) {
conjunction.add( predicate );
}
}
return conjunction;
}
/**
* Return the disjuction of two expressions
*
* @param lhs
* @param rhs
* @return Criterion
*/
public static LogicalExpression or(Criterion lhs, Criterion rhs) {
return new LogicalExpression(lhs, rhs, "or");
}
/**
* Return the disjuction of multiple expressions
*
* @param predicates The predicates making up the initial junction
*
* @return The conjunction
*/
public static Disjunction or(Criterion... predicates) {
Disjunction disjunction = disjunction();
if ( predicates != null ) {
for ( Criterion predicate : predicates ) {
disjunction.add( predicate );
}
}
return disjunction;
}
/**
* Return the negation of an expression
*
* @param expression
* @return Criterion
*/
public static Criterion not(Criterion expression) {
return new NotExpression(expression);
}
/**
* Apply a constraint expressed in SQL, with the given JDBC
* parameters. Any occurrences of {alias} will be
* replaced by the table alias.
*
* @param sql
* @param values
* @param types
* @return Criterion
*/
public static Criterion sqlRestriction(String sql, Object[] values, Type[] types) {
return new SQLCriterion(sql, values, types);
}
/**
* Apply a constraint expressed in SQL, with the given JDBC
* parameter. Any occurrences of {alias} will be replaced
* by the table alias.
*
* @param sql
* @param value
* @param type
* @return Criterion
*/
public static Criterion sqlRestriction(String sql, Object value, Type type) {
return new SQLCriterion(sql, new Object[] { value }, new Type[] { type } );
}
/**
* Apply a constraint expressed in SQL. Any occurrences of {alias}
* will be replaced by the table alias.
*
* @param sql
* @return Criterion
*/
public static Criterion sqlRestriction(String sql) {
return new SQLCriterion(sql, ArrayHelper.EMPTY_OBJECT_ARRAY, ArrayHelper.EMPTY_TYPE_ARRAY);
}
/**
* Group expressions together in a single conjunction (A and B and C...)
*
* @return Conjunction
*/
public static Conjunction conjunction() {
return new Conjunction();
}
/**
* Group expressions together in a single disjunction (A or B or C...)
*
* @return Conjunction
*/
public static Disjunction disjunction() {
return new Disjunction();
}
/**
* Apply an "equals" constraint to each property in the
* key set of a Map
*
* @param propertyNameValues a map from property names to values
* @return Criterion
*/
public static Criterion allEq(Map propertyNameValues) {
Conjunction conj = conjunction();
Iterator iter = propertyNameValues.entrySet().iterator();
while ( iter.hasNext() ) {
Map.Entry me = (Map.Entry) iter.next();
conj.add( eq( (String) me.getKey(), me.getValue() ) );
}
return conj;
}
/**
* Constrain a collection valued property to be empty
*/
public static Criterion isEmpty(String propertyName) {
return new EmptyExpression(propertyName);
}
/**
* Constrain a collection valued property to be non-empty
*/
public static Criterion isNotEmpty(String propertyName) {
return new NotEmptyExpression(propertyName);
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeEq(String propertyName, int size) {
return new SizeExpression(propertyName, size, "=");
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeNe(String propertyName, int size) {
return new SizeExpression(propertyName, size, "<>");
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeGt(String propertyName, int size) {
return new SizeExpression(propertyName, size, "<");
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeLt(String propertyName, int size) {
return new SizeExpression(propertyName, size, ">");
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeGe(String propertyName, int size) {
return new SizeExpression(propertyName, size, "<=");
}
/**
* Constrain a collection valued property by size
*/
public static Criterion sizeLe(String propertyName, int size) {
return new SizeExpression(propertyName, size, ">=");
}
/**
* Consider using any of the natural id based loading stuff from session instead, especially in cases
* where the restriction is the full set of natural id values.
*
* @see Session#byNaturalId(Class)
* @see Session#byNaturalId(String)
* @see Session#bySimpleNaturalId(Class)
* @see Session#bySimpleNaturalId(String)
*/
public static NaturalIdentifier naturalId() {
return new NaturalIdentifier();
}
}
