Open Source Repository

Home /hibernate/hibernate-3.2.6.ga | Repository Home


org/hibernate/persister/collection/CollectionPropertyMapping.java
package org.hibernate.persister.collection;

import org.hibernate.Hibernate;
import org.hibernate.QueryException;
import org.hibernate.persister.entity.PropertyMapping;
import org.hibernate.type.Type;

/**
 @author Gavin King
 */
public class CollectionPropertyMapping implements PropertyMapping {

  private final QueryableCollection memberPersister;

  public CollectionPropertyMapping(QueryableCollection memberPersister) {
    this.memberPersister = memberPersister;
  }

  public Type toType(String propertyNamethrows QueryException {
    if propertyName.equals(CollectionPropertyNames.COLLECTION_ELEMENTS) ) {
      return memberPersister.getElementType();
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_INDICES) ) {
      if !memberPersister.hasIndex() ) throw new QueryException("unindexed collection before indices()");
      return memberPersister.getIndexType();
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_SIZE) ) {
      return Hibernate.INTEGER;
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_INDEX) ) {
      return memberPersister.getIndexType();
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_INDEX) ) {
      return memberPersister.getIndexType();
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_ELEMENT) ) {
      return memberPersister.getElementType();
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_ELEMENT) ) {
      return memberPersister.getElementType();
    }
    else {
      //return memberPersister.getPropertyType(propertyName);
      throw new QueryException("illegal syntax near collection: " + propertyName);
    }
  }

  public String[] toColumns(String alias, String propertyNamethrows QueryException {
    if propertyName.equals(CollectionPropertyNames.COLLECTION_ELEMENTS) ) {
      return memberPersister.getElementColumnNames(alias);
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_INDICES) ) {
      if !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in indices()");
      return memberPersister.getIndexColumnNames(alias);
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_SIZE) ) {
      String[] cols = memberPersister.getKeyColumnNames();
      return new String[] { "count(" + alias + '.' + cols[0')' };
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_INDEX) ) {
      if !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in maxIndex()");
      String[] cols = memberPersister.getIndexColumnNames(alias);
      if cols.length!=throw new QueryException("composite collection index in maxIndex()");
      return new String[] { "max(" + cols[0')' };
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_INDEX) ) {
      if !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in minIndex()");
      String[] cols = memberPersister.getIndexColumnNames(alias);
      if cols.length!=throw new QueryException("composite collection index in minIndex()");
      return new String[] { "min(" + cols[0')' };
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_ELEMENT) ) {
      String[] cols = memberPersister.getElementColumnNames(alias);
      if cols.length!=throw new QueryException("composite collection element in maxElement()");
      return new String[] { "max(" + cols[0')' };
    }
    else if propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_ELEMENT) ) {
      String[] cols = memberPersister.getElementColumnNames(alias);
      if cols.length!=throw new QueryException("composite collection element in minElement()");
      return new String[] { "min(" + cols[0')' };
    }
    else {
      //return memberPersister.toColumns(alias, propertyName);
      throw new QueryException("illegal syntax near collection: " + propertyName);
    }
  }

  /**
   * Given a property path, return the corresponding column name(s).
   */
  public String[] toColumns(String propertyNamethrows QueryException, UnsupportedOperationException {
    throw new UnsupportedOperationException"References to collections must be define a SQL alias" );
  }

  public Type getType() {
    //return memberPersister.getType();
    return memberPersister.getCollectionType();
  }

}