Struts example source code file (Link.java)

This example Struts source code file (Link.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

comparable, io, link, link, render, sitegraphnode, sitegraphnode, string, string, type_action, type_action, type_form, type_href, type_redirect, type_result

The Struts Link.java source code

/*
 * $Id: Link.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * 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.apache.struts2.sitegraph.model;

import java.io.IOException;

/**
 */
public class Link implements Render, Comparable {
    public static final int TYPE_FORM = 0;
    public static final int TYPE_ACTION = 1;
    public static final int TYPE_HREF = 2;
    public static final int TYPE_RESULT = 3;
    public static final int TYPE_REDIRECT = 4;

    private SiteGraphNode from;
    private SiteGraphNode to;
    private int type;
    private String label;

    public Link(SiteGraphNode from, SiteGraphNode to, int type, String label) {
        this.from = from;
        this.to = to;
        this.type = type;
        this.label = label;
    }

    public void render(IndentWriter writer) throws IOException {
        writer.write(from.getFullName() + " -> " + to.getFullName() + " [label=\"" + getRealLabel() + "\"" + getColor() + "];");
    }

    private String getRealLabel() {
        switch (type) {
            case TYPE_ACTION:
                return "action" + label;
            case TYPE_FORM:
                return "form" + label;
            case TYPE_HREF:
                return "href" + label;
            case TYPE_REDIRECT:
                return "redirect: " + label;
            case TYPE_RESULT:
                return label;
        }

        return "";
    }

    private String getColor() {
        if (type == TYPE_RESULT || type == TYPE_ACTION) {
            return ",color=\"darkseagreen2\"";
        } else {
            return "";
        }
    }

    public int compareTo(Object o) {
        Link other = (Link) o;
        int result = from.compareTo(other.from);
        if (result != 0) {
            return result;
        }

        result = to.compareTo(other.to);
        if (result != 0) {
            return result;
        }

        result = label.compareTo(other.label);
        if (result != 0) {
            return result;
        }

        return new Integer(type).compareTo(new Integer(other.type));
    }
}