org.cast.cwm.components.models.CountModel.java Source code

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Here is the source code for org.cast.cwm.components.models.CountModel.java

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/*
 * Copyright 2011-2016 CAST, Inc.
 *
 * This file is part of the CAST Wicket Modules:
 * see <http://code.google.com/p/cast-wicket-modules>.
 *
 * The CAST Wicket Modules are free software: you can redistribute and/or
 * modify them under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * The CAST Wicket Modules are distributed in the hope that they will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this software.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.cast.cwm.components.models;

import java.util.Collection;

import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.lang.Args;

/**
 * A model that will return the size of some collection.
 */
public class CountModel extends AbstractReadOnlyModel<Integer> {

    private IModel<? extends Collection<?>> delegate;

    private static final long serialVersionUID = 1L;

    public CountModel(IModel<? extends Collection<?>> delegate) {
        Args.notNull(delegate, "Chained model");
        this.delegate = delegate;
    }

    @Override
    public Integer getObject() {
        return delegate.getObject().size();
    }

    @Override
    public void detach() {
        delegate.detach();
    }

}