EOEntitiesCellModifier.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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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.entities;

import java.util.LinkedList;
import java.util.List;

import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TableViewer;
import org.objectstyle.wolips.baseforuiplugins.utils.KeyComboBoxCellEditor;
import org.objectstyle.wolips.eomodeler.Messages;
import org.objectstyle.wolips.eomodeler.core.model.EOEntity;
import org.objectstyle.wolips.eomodeler.core.model.EOModel;
import org.objectstyle.wolips.eomodeler.utils.TablePropertyCellModifier;
import org.objectstyle.wolips.eomodeler.utils.TableUtils;

public class EOEntitiesCellModifier extends TablePropertyCellModifier {
	private static final String NO_PARENT_VALUE = Messages.getString("EOEntitiesCellModifier.noParent");

	private CellEditor[] myCellEditors;

	private List myEntityNames;

	public EOEntitiesCellModifier(TableViewer _modelTableViewer, CellEditor[] _cellEditors) {
		super(_modelTableViewer);
		myCellEditors = _cellEditors;
	}

	protected boolean _canModify(Object _element, String _property) {
		if (EOEntity.PARENT.equals(_property)) {
			EOModel model = (EOModel) getTableViewer().getInput();
			myEntityNames = new LinkedList(model.getModelGroup().getEntityNames());
			myEntityNames.add(0, EOEntitiesCellModifier.NO_PARENT_VALUE);
			String[] entityNames = (String[]) myEntityNames.toArray(new String[myEntityNames.size()]);
			int columnNumber = TableUtils.getColumnNumberForTablePropertyNamed(EOEntity.class.getName(), _property);
			if (columnNumber != -1) {
				KeyComboBoxCellEditor cellEditor = (KeyComboBoxCellEditor) myCellEditors[columnNumber];
				cellEditor.setItems(entityNames);
			}
		}
		return true;
	}

	public Object getValue(Object _element, String _property) {
		EOEntity entity = (EOEntity) _element;
		Object value = null;
		if (EOEntity.PARENT.equals(_property)) {
			EOEntity parent = entity.getParent();
			String parentName;
			if (parent == null) {
				parentName = EOEntitiesCellModifier.NO_PARENT_VALUE;
			} else {
				parentName = parent.getName();
			}
			value = Integer.valueOf(myEntityNames.indexOf(parentName));
		} else {
			value = super.getValue(_element, _property);
		}
		return value;
	}

	protected boolean _modify(Object _element, String _property, Object _value) throws Throwable {
		boolean modified = false;
		EOEntity entity = (EOEntity) _element;
		if (EOEntity.PARENT.equals(_property)) {
			Integer parentNameIndex = (Integer) _value;
			int parentNameIndexInt = parentNameIndex.intValue();
			String parentName = (parentNameIndexInt == -1) ? null : (String) myEntityNames.get(parentNameIndexInt);
			if (EOEntitiesCellModifier.NO_PARENT_VALUE.equals(parentName)) {
				entity.setParent(null);
			} else {
				EOEntity parent = entity.getModel().getModelGroup().getEntityNamed(parentName);
				entity.setParent(parent);
			}
			modified = true;
		}
		return modified;
	}
}