org.wallride.support.CategoryUtils.java Source code

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Here is the source code for org.wallride.support.CategoryUtils.java

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/*
 * Copyright 2014 Tagbangers, Inc.
 *
 * 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.wallride.support;

import org.springframework.context.i18n.LocaleContextHolder;
import org.wallride.domain.Category;
import org.wallride.model.TreeNode;
import org.wallride.service.CategoryService;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

public class CategoryUtils {

    private CategoryService categoryService;

    public CategoryUtils(CategoryService categoryService) {
        this.categoryService = categoryService;
    }

    public List<Category> getAllCategories() {
        return getAllCategories(false);
    }

    public List<Category> getAllCategories(boolean includeNoArticle) {
        return categoryService.getCategories(LocaleContextHolder.getLocale().getLanguage(), includeNoArticle);
    }

    public List<TreeNode<Category>> getNodes() {
        return getNodes(false);
    }

    public List<TreeNode<Category>> getNodes(boolean includeNoArticle) {
        Collection<Category> categories = categoryService
                .getCategories(LocaleContextHolder.getLocale().getLanguage(), includeNoArticle);

        List<TreeNode<Category>> rootNodes = new ArrayList<>();
        Iterator<Category> i = categories.iterator();
        while (i.hasNext()) {
            Category Category = i.next();
            if (Category.getParent() == null) {
                TreeNode<Category> node = new TreeNode<>(Category);
                rootNodes.add(node);
                i.remove();
            }
        }

        for (TreeNode<Category> node : rootNodes) {
            createNode(node, categories);
        }
        return rootNodes;
    }

    private void createNode(TreeNode<Category> parent, Collection<Category> Categories) {
        List<TreeNode<Category>> children = new ArrayList<>();
        Iterator<Category> i = Categories.iterator();
        while (i.hasNext()) {
            Category Category = i.next();
            TreeNode<Category> node = new TreeNode<>(Category);
            node.setParent(parent);
            if (parent.getObject().equals(Category.getParent())) {
                children.add(node);
                i.remove();
            }
        }
        parent.setChildren(children);

        for (TreeNode<Category> node : children) {
            createNode(node, Categories);
        }
    }
}