001/*
002 * flattr4j - A Java library for Flattr
003 *
004 * Copyright (C) 2011 Richard "Shred" Körber
005 *   http://flattr4j.shredzone.org
006 *
007 * This program is free software: you can redistribute it and/or modify
008 * it under the terms of the GNU General Public License / GNU Lesser
009 * General Public License as published by the Free Software Foundation,
010 * either version 3 of the License, or (at your option) any later version.
011 *
012 * Licensed under the Apache License, Version 2.0 (the "License");
013 * you may not use this file except in compliance with the License.
014 *
015 * This program is distributed in the hope that it will be useful,
016 * but WITHOUT ANY WARRANTY; without even the implied warranty of
017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
018 */
019package org.shredzone.flattr4j.web.tag;
020
021import java.io.IOException;
022
023import javax.servlet.jsp.JspException;
024import javax.servlet.jsp.tagext.BodyTagSupport;
025
026import org.shredzone.flattr4j.model.AutoSubmission;
027import org.shredzone.flattr4j.model.Thing;
028import org.shredzone.flattr4j.web.BadgeType;
029import org.shredzone.flattr4j.web.builder.StaticButtonBuilder;
030
031/**
032 * A static button to a Flattr thing.
033 *
034 * @author Richard "Shred" Körber
035 */
036public class StaticTag extends BodyTagSupport implements Attributed {
037    private static final long serialVersionUID = -7356980489242218537L;
038
039    private StaticButtonBuilder builder;
040
041    private String var = null;
042    private String scope = null;
043
044    public void setThing(Object thing) {
045        setupBuilder();
046        if (thing instanceof Thing) {
047            builder.thing((Thing) thing);
048        } else if (thing instanceof AutoSubmission) {
049            builder.thing((AutoSubmission) thing);
050        } else {
051            builder.thing(thing.toString());
052        }
053    }
054
055    public void setBadgeUrl(String url) {
056        setupBuilder();
057        builder.badgeUrl(url);
058    }
059
060    public void setBadge(Object type) {
061        setupBuilder();
062        if (type instanceof BadgeType) {
063            builder.badge((BadgeType) type);
064        } else {
065            builder.badge(BadgeType.valueOf(type.toString().toUpperCase()));
066        }
067    }
068
069    public void setStyle(String style) {
070        setupBuilder();
071        builder.style(style);
072    }
073
074    public void setStyleClass(String styleClass) {
075        setupBuilder();
076        builder.styleClass(styleClass);
077    }
078
079    public void setVar(String var) {
080        this.var = var;
081    }
082
083    public void setScope(String scope) {
084        this.scope = scope;
085    }
086
087    @Override
088    public void setAttribute(String name, String value) {
089        setupBuilder();
090        builder.attribute(name, value);
091    }
092
093    @Override
094    public int doStartTag() throws JspException {
095        setupBuilder();
096        return EVAL_BODY_INCLUDE;
097    }
098
099    @Override
100    public int doEndTag() throws JspException {
101        String tag = builder.toString();
102
103        if (var != null) {
104            TagUtils.setScopedAttribute(pageContext, var, tag, scope);
105
106        } else {
107            try {
108                pageContext.getOut().print(tag);
109            } catch (IOException ex) {
110                throw new JspException(ex);
111            }
112        }
113
114        disposeBuilder();
115        return EVAL_PAGE;
116    }
117
118    /**
119     * Creates a new builder instance, if not already done.
120     */
121    protected void setupBuilder() {
122        if (builder == null) {
123            builder = new StaticButtonBuilder();
124        }
125    }
126
127    /**
128     * Disposes the builder instance.
129     */
130    protected void disposeBuilder() {
131        builder = null;
132    }
133
134}