public class ParameterTranslationsImpl extends Object implements org.hibernate.hql.ParameterTranslations
Defines the information available for parameters encountered during
query translation through the antlr-based parser.
author
Steve Ebersole
Fields Summary
private final Map
namedParameters
private final ParameterInfo[]
ordinalParameters
Constructors Summary
public ParameterTranslationsImpl(List parameterSpecifications)
Constructs a parameter metadata object given a list of parameter
specifications.
Note: the order in the incoming list denotes the parameter's
psudeo-position within the resulting sql statement.
param
parameterSpecifications
class NamedParamTempHolder {
String name;
Type type;
List positions = new ArrayList();
}
int size = parameterSpecifications.size();
List ordinalParameterList = new ArrayList();
Map namedParameterMap = new HashMap();
for ( int i = 0; i < size; i++ ) {
final ParameterSpecification spec = ( ParameterSpecification ) parameterSpecifications.get( i );
if ( PositionalParameterSpecification.class.isAssignableFrom( spec.getClass() ) ) {
PositionalParameterSpecification ordinalSpec = ( PositionalParameterSpecification ) spec;
ordinalParameterList.add( new ParameterInfo( i, ordinalSpec.getExpectedType() ) );
}
else if ( NamedParameterSpecification.class.isAssignableFrom( spec.getClass() ) ) {
NamedParameterSpecification namedSpec = ( NamedParameterSpecification ) spec;
NamedParamTempHolder paramHolder = ( NamedParamTempHolder ) namedParameterMap.get( namedSpec.getName() );
if ( paramHolder == null ) {
paramHolder = new NamedParamTempHolder();
paramHolder.name = namedSpec.getName();
paramHolder.type = namedSpec.getExpectedType();
namedParameterMap.put( namedSpec.getName(), paramHolder );
}
paramHolder.positions.add( new Integer( i ) );
}
else {
// don't care about other param types here, just those explicitly user-defined...
}
}
ordinalParameters = ( ParameterInfo[] ) ordinalParameterList.toArray( new ParameterInfo[ordinalParameterList.size()] );
if ( namedParameterMap.isEmpty() ) {
namedParameters = java.util.Collections.EMPTY_MAP;
}
else {
Map namedParametersBacking = new HashMap( namedParameterMap.size() );
Iterator itr = namedParameterMap.values().iterator();
while( itr.hasNext() ) {
final NamedParamTempHolder holder = ( NamedParamTempHolder ) itr.next();
namedParametersBacking.put(
holder.name,
new ParameterInfo( ArrayHelper.toIntArray( holder.positions ), holder.type )
);
}
namedParameters = java.util.Collections.unmodifiableMap( namedParametersBacking );
}
