org.hibernate.sql.HSQLCaseFragment Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.sql;
import java.util.Iterator;
import java.util.Map;
/**
* The HSQL CASEWHEN function.
*
* casewhen(..., ..., ...) as ...
*
* @author Wolfgang Jung
*/
public class HSQLCaseFragment extends CaseFragment {
public String toFragmentString() {
StringBuilder buf = new StringBuilder( cases.size() * 15 + 10 );
StringBuilder buf2 = new StringBuilder( cases.size() );
Iterator iter = cases.entrySet().iterator();
while ( iter.hasNext() ) {
Map.Entry me = (Map.Entry) iter.next();
buf.append(" casewhen(")
.append( me.getKey() )
.append(" is not null")
.append(", ")
.append( me.getValue() )
.append(", ");
buf2.append(")");
}
buf.append("-1"); //null caused some problems
buf.append( buf2.toString() );
if ( returnColumnName!=null ) {
buf.append(" as ")
.append(returnColumnName);
}
return buf.toString();
}
}