org.opensingular.lib.wicket.util.model.FallbackReadOnlyModel.java Source code

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Here is the source code for org.opensingular.lib.wicket.util.model.FallbackReadOnlyModel.java

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/*
 * Copyright (C) 2016 Singular Studios (a.k.a Atom Tecnologia) - www.opensingular.com
 *
 * 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.
 */

package org.opensingular.lib.wicket.util.model;

import java.util.Arrays;

import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;

@SuppressWarnings("serial")
public class FallbackReadOnlyModel<T> extends AbstractReadOnlyModel<T> {

    private final IModel<T>[] models;

    @SafeVarargs
    public FallbackReadOnlyModel(IModel<T>... models) {
        this.models = Arrays.copyOf(models, models.length);
    }

    @Override
    public void detach() {
        for (IModel<T> m : models) {
            m.detach();
        }
    }

    @Override
    public T getObject() {
        for (IModel<T> m : models) {
            T object = m.getObject();
            if (object != null) {
                return object;
            }
        }
        return null;
    }

}