org.syncope.console.commons.RoleTreeBuilder.java Source code

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Here is the source code for org.syncope.console.commons.RoleTreeBuilder.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.syncope.console.commons;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.syncope.client.to.RoleTO;
import org.syncope.console.rest.RoleRestClient;

public class RoleTreeBuilder {

    @Autowired
    private RoleRestClient restClient;

    private RoleTOComparator comparator = new RoleTOComparator();

    private List<RoleTO> getChildRoles(final long parentRoleId, final List<RoleTO> roles) {

        List<RoleTO> result = new ArrayList<RoleTO>();
        for (RoleTO role : roles) {
            if (role.getParent() == parentRoleId) {
                result.add(role);
            }
        }

        Collections.sort(result, comparator);
        return result;
    }

    private void populateSubtree(final DefaultMutableTreeNode subRoot, final List<RoleTO> roles) {

        RoleTO role = (RoleTO) subRoot.getUserObject();

        DefaultMutableTreeNode child;
        for (RoleTO subRoleTO : getChildRoles(role.getId(), roles)) {
            child = new DefaultMutableTreeNode(subRoleTO);
            subRoot.add(child);
            populateSubtree(child, roles);
        }
    }

    public TreeModel build() {
        return build(restClient.getAllRoles());
    }

    public TreeModel build(final List<RoleTO> roles) {
        DefaultMutableTreeNode fakeroot = new DefaultMutableTreeNode(new FakeRootRoleTO());

        populateSubtree(fakeroot, roles);

        return new DefaultTreeModel(fakeroot);
    }

    private static class RoleTOComparator implements Comparator<RoleTO>, Serializable {

        private static final long serialVersionUID = 7085057398406518811L;

        @Override
        public int compare(final RoleTO r1, final RoleTO r2) {
            if (r1.getId() < r2.getId()) {
                return -1;
            }
            if (r1.getId() == r2.getId()) {
                return 0;
            }

            return 1;
        }
    }

    private static class FakeRootRoleTO extends RoleTO {

        private static final long serialVersionUID = 4839183625773925488L;

        public FakeRootRoleTO() {
            super();

            setId(0);
            setName("");
            setParent(-1);
        }

        @Override
        public String getDisplayName() {
            return "";
        }
    }
}