urilistregexpfilter.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="85" href="#85">85</a>     }
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>     <strong>protected</strong> <strong>boolean</strong> innerAccepts(Object o) {
<a name="88" href="#88">88</a>         List regexps = getRegexp(o);
<a name="89" href="#89">89</a>         <strong>if</strong>(regexps.size()==0){
<a name="90" href="#90">90</a>             <strong>return</strong> false;
<a name="91" href="#91">91</a>         }
<a name="92" href="#92">92</a>         String str = o.toString();
<a name="93" href="#93">93</a>         Iterator it = regexps.iterator();
<a name="94" href="#94">94</a>         
<a name="95" href="#95">95</a>         <strong>boolean</strong> listLogicOR = isListLogicOR(o);
<a name="96" href="#96">96</a>         <em class="comment">// Result is initialized so that if OR based the default assumption is</em>
<a name="97" href="#97">97</a>         <em class="comment">// false (find no matches) but if AND based the default assumption is</em>
<a name="98" href="#98">98</a>         <em class="comment">// true (finds no non-matches)</em>
<a name="99" href="#99">99</a>         <strong>boolean</strong> result = listLogicOR == false;
<a name="100" href="#100">100</a>        
<a name="101" href="#101">101</a>        <strong>while</strong>(it.hasNext()){
<a name="102" href="#102">102</a>            String regexp = (String)it.next();
<a name="103" href="#103">103</a>            <strong>boolean</strong> matches = TextUtils.matches(regexp, str);
<a name="104" href="#104">104</a> 
<a name="105" href="#105">105</a>            <strong>if</strong> (logger.isLoggable(Level.FINER)) {
<a name="106" href="#106">106</a>                logger.finer(<span class="string">"Tested '"</span> + str + <span class="string">"' match with regex '"</span> +
<a name="107" href="#107">107</a>                    regexp + <span class="string">" and result was "</span> + matches);
<a name="108" href="#108">108</a>            }
<a name="109" href="#109">109</a>            
<a name="110" href="#110">110</a>            <strong>if</strong>(matches){
<a name="111" href="#111">111</a>                <strong>if</strong>(listLogicOR){
<a name="112" href="#112">112</a>                    <em class="comment">// OR based and we just got a match, done!</em>
<a name="113" href="#113">113</a>                    result = <strong>true</strong>;
<a name="114" href="#114">114</a>                    <strong>break</strong>;
<a name="115" href="#115">115</a>                }
<a name="116" href="#116">116</a>            } <strong>else</strong> {
<a name="117" href="#117">117</a>                <strong>if</strong>(listLogicOR == false){
<a name="118" href="#118">118</a>                    <em class="comment">// AND based and we just found a non-match, done!</em>
<a name="119" href="#119">119</a>                    result = false;
<a name="120" href="#120">120</a>                    <strong>break</strong>;
<a name="121" href="#121">121</a>                }
<a name="122" href="#122">122</a>            }
<a name="123" href="#123">123</a>        }
<a name="124" href="#124">124</a>        
<a name="125" href="#125">125</a>        result = getMatchReturnValue(o) ? result : !result;
<a name="126" href="#126">126</a>        
<a name="127" href="#127">127</a>        <strong>if</strong> (logger.isLoggable(Level.FINE) &amp;&amp; result){
<a name="128" href="#128">128</a>            logger.fine(<span class="string">"Matched: "</span> + str);
<a name="129" href="#129">129</a>        }
<a name="130" href="#130">130</a>        
<a name="131" href="#131">131</a>        <strong>return</strong> result;
<a name="132" href="#132">132</a>    }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>    <em>/**<em>* </em></em>
<a name="135" href="#135">135</a> <em>    * Get the regular expressions list to match the URI against.</em>
<a name="136" href="#136">136</a> <em>    *</em>
<a name="137" href="#137">137</a> <em>    * @param o the object for which the regular expression should be</em>
<a name="138" href="#138">138</a> <em>    *          matched against.</em>
<a name="139" href="#139">139</a> <em>    * @return the regular expression to match against.</em>
<a name="140" href="#140">140</a> <em>    */</em>
<a name="141" href="#141">141</a>    <strong>protected</strong> List getRegexp(Object o) {
<a name="142" href="#142">142</a>        <strong>try</strong> {
<a name="143" href="#143">143</a>            <strong>return</strong> (StringList) getAttribute(o, ATTR_REGEXP_LIST);
<a name="144" href="#144">144</a>        } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="145" href="#145">145</a>            logger.severe(e.getMessage());
<a name="146" href="#146">146</a>            <em class="comment">// Basically the filter is inactive if this occurs</em>
<a name="147" href="#147">147</a>            <em class="comment">// (The caller should be returning false when regexp is null).</em>
<a name="148" href="#148">148</a>            <strong>return</strong> <strong>null</strong>;  
<a name="149" href="#149">149</a>        }
<a name="150" href="#150">150</a>    }
<a name="151" href="#151">151</a>    
<a name="152" href="#152">152</a>    <strong>protected</strong> <strong>boolean</strong> getMatchReturnValue(Object o){
<a name="153" href="#153">153</a>        <strong>try</strong> {
<a name="154" href="#154">154</a>            <strong>return</strong> ((Boolean) getAttribute(o, ATTR_MATCH_RETURN_VALUE)).booleanValue();
<a name="155" href="#155">155</a>        } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="156" href="#156">156</a>            logger.severe(e.getMessage());
<a name="157" href="#157">157</a>            <strong>return</strong> DEFAULT_MATCH_RETURN_VALUE.booleanValue();  
<a name="158" href="#158">158</a>        }
<a name="159" href="#159">159</a>    }
<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a>    <strong>protected</strong> <strong>boolean</strong> isListLogicOR(Object o){
<a name="162" href="#162">162</a>        String logic = DEFAULT_LIST_LOGIC;
<a name="163" href="#163">163</a>        <strong>try</strong> {
<a name="164" href="#164">164</a>            logic = (String) getAttribute(o, ATTR_LIST_LOGIC);
<a name="165" href="#165">165</a>        } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="166" href="#166">166</a>            logger.severe(e.getMessage());
<a name="167" href="#167">167</a>        }
<a name="168" href="#168">168</a>        <strong>return</strong> logic.equals(<span class="string">"OR"</span>) ? <strong>true</strong> : false;
<a name="169" href="#169">169</a>    }
<a name="170" href="#170">170</a> 
<a name="171" href="#171">171</a> }
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