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MID-3938, step 2: when editing a user, we delay fetching of all user'…
…s assignment targets until really necessary
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gui/admin-gui/src/main/java/com/evolveum/midpoint/gui/api/model/CountableLoadableModel.java
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| /* | ||
| * Copyright (c) 2010-2017 Evolveum | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package com.evolveum.midpoint.gui.api.model; | ||
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| import java.util.List; | ||
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| /** | ||
| * A loadable model of a list that knows how to provide count of list items without having to retrieve the actual data. | ||
| * Useful e.g. to implement MID-3938 (Optimize midPoint for many focus assignments). | ||
| * | ||
| * @author mederly | ||
| */ | ||
| public abstract class CountableLoadableModel<T> extends LoadableModel<List<T>> { | ||
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| public CountableLoadableModel() { | ||
| } | ||
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| public CountableLoadableModel(boolean alwaysReload) { | ||
| super(alwaysReload); | ||
| } | ||
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| public int count() { | ||
| if (isLoaded()) { | ||
| List<T> object = getObject(); | ||
| return object != null ? object.size() : 0; | ||
| } else { | ||
| return countInternal(); | ||
| } | ||
| } | ||
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| // This should be overridden to provide more efficient implementation, avoiding full loading of objects | ||
| public int countInternal() { | ||
| List<T> object = getObject(); | ||
| return object != null ? object.size() : 0; | ||
| } | ||
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| } |
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