//$Id: DecodeCaseFragment.java 4851 2004-12-02 05:09:49Z oneovthafew $
package org.hibernate.sql;
import java.util.Iterator;
import java.util.Map;
/**
An Oracle-style DECODE function.
<br>
<code>decode(pkvalue, key1, 1, key2, 2, ..., 0)</code>
<br>
@author Simon Harris
*/
public class DecodeCaseFragment extends CaseFragment {
public String toFragmentString() {
StringBuffer buf = new StringBuffer( cases.size() * 15 + 10 )
.append("decode(");
Iterator iter = cases.entrySet().iterator();
while ( iter.hasNext() ) {
Map.Entry me = (Map.Entry) iter.next();
if ( iter.hasNext() ) {
buf.append(", ")
.append( me.getKey() )
.append(", ")
.append( me.getValue() );
}
else {
buf.insert( 7, me.getKey() )
.append(", ")
.append( me.getValue() );
}
}
buf.append(')');
if (returnColumnName!=null) {
buf.append(" as ")
.append(returnColumnName);
}
return buf.toString();
}
}
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