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<a name="1" href="#1">1</a> <em class="comment">/*</em>
<a name="2" href="#2">2</a> <em class="comment"> * AbstractMenuDisplayer.java</em>
<a name="3" href="#3">3</a> <em class="comment"> *</em>
<a name="4" href="#4">4</a> <em class="comment"> * Created on March 30, 2002, 3:34 PM</em>
<a name="5" href="#5">5</a> <em class="comment"> */</em>
<a name="6" href="#6">6</a> <strong>package</strong> net.sf.navigator.displayer;
<a name="7" href="#7">7</a>
<a name="8" href="#8">8</a> <strong>import</strong> net.sf.navigator.menu.MenuComponent;
<a name="9" href="#9">9</a> <strong>import</strong> net.sf.navigator.menu.PermissionsAdapter;
<a name="10" href="#10">10</a> <strong>import</strong> net.sf.navigator.util.MessageResources;
<a name="11" href="#11">11</a> <strong>import</strong> org.apache.commons.logging.Log;
<a name="12" href="#12">12</a> <strong>import</strong> org.apache.commons.logging.LogFactory;
<a name="13" href="#13">13</a>
<a name="14" href="#14">14</a> <strong>import</strong> javax.servlet.jsp.JspException;
<a name="15" href="#15">15</a> <strong>import</strong> javax.servlet.jsp.JspWriter;
<a name="16" href="#16">16</a> <strong>import</strong> javax.servlet.jsp.PageContext;
<a name="17" href="#17">17</a> <strong>import</strong> java.io.IOException;
<a name="18" href="#18">18</a>
<a name="19" href="#19">19</a> <em>/**</em>
<a name="20" href="#20">20</a> <em> * Abstract implementation of <code>MenuDisplayer</code> that can be used as</em>
<a name="21" href="#21">21</a> <em> * a basis for other menu displayers.</em>
<a name="22" href="#22">22</a> <em> *</em>
<a name="23" href="#23">23</a> <em> * @author ssayles</em>
<a name="24" href="#24">24</a> <em> * @version</em>
<a name="25" href="#25">25</a> <em> */</em>
<a name="26" href="#26">26</a> <strong>public</strong> <strong>abstract</strong> <strong>class</strong> <a href="../../../../net/sf/navigator/displayer/AbstractMenuDisplayer.html">AbstractMenuDisplayer</a> implements <a href="../../../../net/sf/navigator/displayer/MenuDisplayer.html">MenuDisplayer</a> {
<a name="27" href="#27">27</a> <em class="comment">//~ Instance fields ========================================================</em>
<a name="28" href="#28">28</a>
<a name="29" href="#29">29</a> <strong>protected</strong> <strong>final</strong> <strong>transient</strong> Log log = LogFactory.getLog(getClass());
<a name="30" href="#30">30</a> <strong>protected</strong> String name;
<a name="31" href="#31">31</a> <strong>protected</strong> <a href="../../../../net/sf/navigator/util/MessageResources.html">MessageResources</a> displayStrings;
<a name="32" href="#32">32</a> <strong>protected</strong> JspWriter out;
<a name="33" href="#33">33</a> <strong>protected</strong> String target;
<a name="34" href="#34">34</a>
<a name="35" href="#35">35</a> <em>/**</em><em> Holds value of property permissionsAdapter. */</em>
<a name="36" href="#36">36</a> <strong>protected</strong> <a href="../../../../net/sf/navigator/menu/PermissionsAdapter.html">PermissionsAdapter</a> permissionsAdapter;
<a name="37" href="#37">37</a> <strong>protected</strong> <a href="../../../../net/sf/navigator/displayer/MenuDisplayerMapping.html">MenuDisplayerMapping</a> mapping;
<a name="38" href="#38">38</a>
<a name="39" href="#39">39</a> <em class="comment">//~ Methods ================================================================</em>
<a name="40" href="#40">40</a>
<a name="41" href="#41">41</a> <strong>public</strong> String getName() {
<a name="42" href="#42">42</a> <strong>return</strong> name;
<a name="43" href="#43">43</a> }
<a name="44" href="#44">44</a>
<a name="45" href="#45">45</a> <strong>public</strong> <strong>void</strong> setName(String name) {
<a name="46" href="#46">46</a> <strong>this</strong>.name = name;
<a name="47" href="#47">47</a> }
<a name="48" href="#48">48</a>
<a name="49" href="#49">49</a> <strong>public</strong> String getConfig() {
<a name="50" href="#50">50</a> String config = <strong>null</strong>;
<a name="51" href="#51">51</a>
<a name="52" href="#52">52</a> <strong>if</strong> (displayStrings != <strong>null</strong>) {
<a name="53" href="#53">53</a> config = displayStrings.getConfig();
<a name="54" href="#54">54</a> }
<a name="55" href="#55">55</a>
<a name="56" href="#56">56</a> <strong>return</strong> config;
<a name="57" href="#57">57</a> }
<a name="58" href="#58">58</a>
<a name="59" href="#59">59</a> <strong>public</strong> <strong>void</strong> setConfig(String config) {
<a name="60" href="#60">60</a> displayStrings = MessageResources.getMessageResources(config);
<a name="61" href="#61">61</a> }
<a name="62" href="#62">62</a>
<a name="63" href="#63">63</a> <strong>public</strong> String getTarget() {
<a name="64" href="#64">64</a> <strong>return</strong> target;
<a name="65" href="#65">65</a> }
<a name="66" href="#66">66</a>
<a name="67" href="#67">67</a> <em>/**</em>
<a name="68" href="#68">68</a> <em> * Convenience method that will first return the target for the displayer</em>
<a name="69" href="#69">69</a> <em> * if it is not null. If the displayer target is null, then it will</em>
<a name="70" href="#70">70</a> <em> * return <code>menu.getTarget()</code>.</em>
<a name="71" href="#71">71</a> <em> *</em>
<a name="72" href="#72">72</a> <em> * @return the target for the menu link.</em>
<a name="73" href="#73">73</a> <em> */</em>
<a name="74" href="#74">74</a> <strong>protected</strong> String getTarget(<a href="../../../../net/sf/navigator/menu/MenuComponent.html">MenuComponent</a> menu) {
<a name="75" href="#75">75</a> String theTarget = <strong>null</strong>;
<a name="76" href="#76">76</a>
<a name="77" href="#77">77</a> <strong>if</strong> (target == <strong>null</strong>) {
<a name="78" href="#78">78</a> <strong>if</strong> (menu.getTarget() != <strong>null</strong>) {
<a name="79" href="#79">79</a> theTarget = menu.getTarget();
<a name="80" href="#80">80</a> }
<a name="81" href="#81">81</a> } <strong>else</strong> {
<a name="82" href="#82">82</a> theTarget = target;
<a name="83" href="#83">83</a> }
<a name="84" href="#84">84</a>
<a name="85" href="#85">85</a> <strong>return</strong> theTarget;
<a name="86" href="#86">86</a> }
<a name="87" href="#87">87</a>
<a name="88" href="#88">88</a> <strong>public</strong> <strong>void</strong> setTarget(String target) {
<a name="89" href="#89">89</a> <strong>this</strong>.target = target;
<a name="90" href="#90">90</a> }
<a name="91" href="#91">91</a>
<a name="92" href="#92">92</a> <em>/**</em>
<a name="93" href="#93">93</a> <em> * Getter for property permissionsAdapter.</em>
<a name="94" href="#94">94</a> <em> * @return Value of property permissionsAdapter.</em>
<a name="95" href="#95">95</a> <em> */</em>
<a name="96" href="#96">96</a> <strong>public</strong> <a href="../../../../net/sf/navigator/menu/PermissionsAdapter.html">PermissionsAdapter</a> getPermissionsAdapter() {
<a name="97" href="#97">97</a> <strong>return</strong> <strong>this</strong>.permissionsAdapter;
<a name="98" href="#98">98</a> }
<a name="99" href="#99">99</a>
<a name="100" href="#100">100</a> <em>/**</em>
<a name="101" href="#101">101</a> <em> * Setter for property permissionsAdapter.</em>
<a name="102" href="#102">102</a> <em> * @param permissionsAdapter New value of property permissionsAdapter.</em>
<a name="103" href="#103">103</a> <em> */</em>
<a name="104" href="#104">104</a> <strong>public</strong> <strong>void</strong> setPermissionsAdapter(<a href="../../../../net/sf/navigator/menu/PermissionsAdapter.html">PermissionsAdapter</a> permissionsAdapter) {
<a name="105" href="#105">105</a> <strong>this</strong>.permissionsAdapter = permissionsAdapter;
<a name="106" href="#106">106</a> }
<a name="107" href="#107">107</a>
<a name="108" href="#108">108</a> <em>/**</em>
<a name="109" href="#109">109</a> <em> * Lifecycle method that should be called when the <code>MenuDisplayer</code></em>
<a name="110" href="#110">110</a> <em> * is being prepared for use.</em>
<a name="111" href="#111">111</a> <em> *</em>
<a name="112" href="#112">112</a> <em> * @param pageContext The JSP pageContext to give the displayer access</em>
<a name="113" href="#113">113</a> <em> * to any resources it may need.</em>
<a name="114" href="#114">114</a> <em> * @param mapping The menu displayer mapping used to embody the xml</em>
<a name="115" href="#115">115</a> <em> * definition.</em>
<a name="116" href="#116">116</a> <em> */</em>
<a name="117" href="#117">117</a> <strong>public</strong> <strong>void</strong> init(PageContext pageContext, <a href="../../../../net/sf/navigator/displayer/MenuDisplayerMapping.html">MenuDisplayerMapping</a> mapping) {
<a name="118" href="#118">118</a> <strong>this</strong>.out = pageContext.getOut();
<a name="119" href="#119">119</a> <strong>this</strong>.mapping = mapping;
<a name="120" href="#120">120</a> }
<a name="121" href="#121">121</a>
<a name="122" href="#122">122</a> <strong>public</strong> <strong>abstract</strong> <strong>void</strong> display(<a href="../../../../net/sf/navigator/menu/MenuComponent.html">MenuComponent</a> menu)
<a name="123" href="#123">123</a> throws JspException, IOException;
<a name="124" href="#124">124</a>
<a name="125" href="#125">125</a> <strong>public</strong> <strong>void</strong> end(PageContext pageContext) {}
<a name="126" href="#126">126</a>
<a name="127" href="#127">127</a> <em>/**</em>
<a name="128" href="#128">128</a> <em> * Returns <code>true</code> if the specified component is usable.</em>
<a name="129" href="#129">129</a> <em> * If <code>permissionsAdapter</code> is not defined, this method will</em>
<a name="130" href="#130">130</a> <em> * return <code>true</code>. Otherwise, the adapter will be used to check</em>
<a name="131" href="#131">131</a> <em> * permissions on the menu.</em>
<a name="132" href="#132">132</a> <em> *</em>
<a name="133" href="#133">133</a> <em> * @return <code>true</code> if the menu component is usable.</em>
<a name="134" href="#134">134</a> <em> * @param menu The menu component.</em>
<a name="135" href="#135">135</a> <em> */</em>
<a name="136" href="#136">136</a> <strong>public</strong> <strong>boolean</strong> isAllowed(<a href="../../../../net/sf/navigator/menu/MenuComponent.html">MenuComponent</a> menu) {
<a name="137" href="#137">137</a> <strong>return</strong> permissionsAdapter == <strong>null</strong> || permissionsAdapter.isAllowed(menu);
<a name="138" href="#138">138</a> }
<a name="139" href="#139">139</a> }
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