Bug 183579 Model need hold on DimensionConditionHandle and DimensionJoinConditionHandle signleton or overwrites the equals and hashcode method
The Dataset Joint Editor need join two Editparts which have the same model. But the DimensionConditionHandle and the DimensionJoinConditionHandle are create a new instance erery time when I get them. So model need hold on them signleton or overwrites the equals and hashcode method.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/MemberRef.java
else
			{
				
				assert ref.refType == PROPERTY_MEMBER_LISTn;
				refType = PROPERTY_MEMBER_LISTn_MEMBER;
				member[0] = ref.member[0];
				index[0] = ref.index[0];
				member[1] = memberDefn;
				depth = 1;
			}
		}
	}
	/**
	 * Returns a reference to the parent.
	 * <p>
	 * <strong>property.list[n].member.list[n][member] </strong>
	 * 
	 * @return a reference to the parent member
	 */
	public MemberRef getParentRef( )
	{
		if ( depth == 1 )
			return null;
		return new MemberRef( propDefn, index[0], member[0] );
	}
	/**
	 * Gets the value of the referenced property, structure, or member.
	 * 
	 * @param module
	 *            the module