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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11
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12 module org.eclipse.core.databinding.observable.map.MapDiff;
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13
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14 import java.lang.all;
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15
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16 import java.util.Set;
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17
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18 /**
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19 * @since 1.1
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20 *
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21 */
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22 public abstract class MapDiff {
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23
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24 /**
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25 * @return the set of keys which were added
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26 */
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27 public abstract Set getAddedKeys();
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28
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29 /**
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30 * @return the set of keys which were removed
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31 */
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32 public abstract Set getRemovedKeys();
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33
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34 /**
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35 * @return the set of keys for which the value has changed
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36 */
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37 public abstract Set getChangedKeys();
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38
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39 /**
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40 * Returns the old value for the given key, which must be an element of
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41 * {@link #getRemovedKeys()} or {@link #getChangedKeys()}.
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42 *
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43 * @param key
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44 * @return the old value for the given key.
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45 */
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46 public abstract Object getOldValue(Object key);
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47
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48 /**
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49 * Returns the new value for the given key, which must be an element of
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50 * {@link #getChangedKeys()} or {@link #getAddedKeys()}.
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51 *
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52 * @param key
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53 * @return the new value for the given key.
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54 */
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55 public abstract Object getNewValue(Object key);
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56 }
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