com.ocs.dynamo.ui.composite.table.ModelBasedTree.java Source code

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Here is the source code for com.ocs.dynamo.ui.composite.table.ModelBasedTree.java

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/*
   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 com.ocs.dynamo.ui.composite.table;

import java.io.Serializable;

import com.ocs.dynamo.domain.AbstractEntity;
import com.ocs.dynamo.domain.AbstractTreeEntity;
import com.ocs.dynamo.domain.model.EntityModel;
import com.ocs.dynamo.ui.utils.VaadinUtils;
import com.vaadin.data.Container;
import com.vaadin.data.util.BeanItemContainer;
import com.vaadin.ui.Tree;

/**
 * A simple model based tree for displaying a recursive collection of data. This currently only
 * works with a BeanItemContainer
 * 
 * @author bas.rutten
 * @param <ID>
 * @param <T>
 */
public class ModelBasedTree<ID extends Serializable, T extends AbstractEntity<ID>> extends Tree {

    private static final long serialVersionUID = 4646534281961148022L;

    private Container container;

    private EntityModel<T> entityModel;

    /**
     * Constructor
     * 
     * @param container
     * @param model
     */
    @SuppressWarnings("unchecked")
    public ModelBasedTree(Container container, EntityModel<T> entityModel) {
        super("", container);
        this.container = container;
        this.entityModel = entityModel;

        // set the parents
        for (Object o : container.getItemIds()) {
            T t = VaadinUtils.getEntityFromContainer(this.container, o);
            if (t instanceof AbstractTreeEntity) {
                AbstractTreeEntity<ID, ?> te = (AbstractTreeEntity<ID, ?>) t;
                if (te.getParent() != null) {
                    configureParent((T) te, (T) te.getParent());
                }
            } else {
                T parent = determineParent(t);
                configureParent(t, parent);
            }
        }

        this.setItemCaptionMode(ItemCaptionMode.PROPERTY);
        this.setItemCaptionPropertyId(this.entityModel.getDisplayProperty());
    }

    protected T determineParent(T child) {
        return null;
    }

    private void configureParent(T child, T parent) {
        if (parent != null) {
            if (container instanceof BeanItemContainer) {
                setParent(child, parent);
            } else {
                setParent(child.getId(), parent.getId());
            }
        }
    }
}