package org.hibernate.criterion;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.TypedValue;
import org.hibernate.util.StringHelper;
/**
* A sequence of a logical expressions combined by some
* associative logical operator
*
* @author Gavin King
*/
public class Junction implements Criterion {
private final List criteria = new ArrayList();
private final String op;
protected Junction(String op) {
this.op = op;
}
public Junction add(Criterion criterion) {
criteria.add(criterion);
return this;
}
public String getOp() {
return op;
}
public TypedValue[] getTypedValues(Criteria crit, CriteriaQuery criteriaQuery)
throws HibernateException {
ArrayList typedValues = new ArrayList();
Iterator iter = criteria.iterator();
while ( iter.hasNext() ) {
TypedValue[] subvalues = ( (Criterion) iter.next() ).getTypedValues(crit, criteriaQuery);
for ( int i=0; i<subvalues.length; i++ ) {
typedValues.add( subvalues[i] );
}
}
return (TypedValue[]) typedValues.toArray( new TypedValue[ typedValues.size() ] );
}
public String toSqlString(Criteria crit, CriteriaQuery criteriaQuery)
throws HibernateException {
if ( criteria.size()==0 ) return "1=1";
StringBuffer buffer = new StringBuffer()
.append('(');
Iterator iter = criteria.iterator();
while ( iter.hasNext() ) {
buffer.append( ( (Criterion) iter.next() ).toSqlString(crit, criteriaQuery) );
if ( iter.hasNext() ) buffer.append(' ').append(op).append(' ');
}
return buffer.append(')').toString();
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return '(' + StringHelper.join( ' ' + op + ' ', criteria.iterator() ) + ')';
}
}
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