EOJoinsCellModifier.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice,
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 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
 * this acknowlegement may appear in the software itself, if and wherever such
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package org.objectstyle.wolips.eomodeler.editors.relationship;

import java.util.Arrays;

import org.eclipse.jface.viewers.TableViewer;
import org.objectstyle.wolips.eomodeler.core.model.EOJoin;
import org.objectstyle.wolips.eomodeler.utils.TablePropertyCellModifier;

public class EOJoinsCellModifier extends TablePropertyCellModifier {
	public EOJoinsCellModifier(TableViewer _joinsTableViewer) {
		super(_joinsTableViewer);
	}

	protected boolean _canModify(Object _element, String _property) throws Throwable {
		boolean canModify = true;
		return canModify;
	}

	public Object getValue(Object _element, String _property) {
		EOJoin join = (EOJoin) _element;
		Object value = null;
		if (EOJoin.DESTINATION_ATTRIBUTE_NAME.equals(_property)) {
			String attributeName = join.getDestinationAttributeName();
			if (attributeName != null) {
				value = Integer.valueOf(Arrays.asList(join.getRelationship().getDestination().getAttributeNames()).indexOf(attributeName));
			}
		} else if (EOJoin.SOURCE_ATTRIBUTE_NAME.equals(_property)) {
			String attributeName = join.getSourceAttributeName();
			if (attributeName != null) {
				value = Integer.valueOf(Arrays.asList(join.getRelationship().getEntity().getAttributeNames()).indexOf(attributeName));
			}
		} else {
			value = super.getValue(_element, _property);
		}
		return value;
	}

	protected boolean _modify(Object _element, String _property, Object _value) throws Throwable {
		boolean modified = false;
		EOJoin join = (EOJoin) _element;
		if (EOJoin.DESTINATION_ATTRIBUTE_NAME.equals(_property)) {
			Integer attributeIndex = (Integer) _value;
			int attributeIndexInt = attributeIndex.intValue();
			if (join.getRelationship().getDestination() != null) {
				String[] destinationAttributeNames = join.getRelationship().getDestination().getAttributeNames();
				String attributeName = (attributeIndexInt == -1) ? null : (String) destinationAttributeNames[attributeIndexInt];
				join.setDestinationAttributeName(attributeName);
			}
			modified = true;
		} else if (EOJoin.SOURCE_ATTRIBUTE_NAME.equals(_property)) {
			Integer attributeIndex = (Integer) _value;
			int attributeIndexInt = attributeIndex.intValue();
			if (join.getRelationship().getEntity() != null) {
				String[] sourceAttributeNames = join.getRelationship().getEntity().getAttributeNames();
				String attributeName = (attributeIndexInt == -1) ? null : (String) sourceAttributeNames[attributeIndexInt];
				join.setSourceAttributeName(attributeName);
			}
			modified = true;
		}
		return modified;
	}
}