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<pre><span class="sourceLineNo">001</span>package serp.bytecode;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import java.io.*;<a name="line.3"></a>
<span class="sourceLineNo">004</span><a name="line.4"></a>
<span class="sourceLineNo">005</span>import serp.bytecode.visitor.*;<a name="line.5"></a>
<span class="sourceLineNo">006</span><a name="line.6"></a>
<span class="sourceLineNo">007</span>/**<a name="line.7"></a>
<span class="sourceLineNo">008</span> * An unrecognized attribute; class files are allowed to contain<a name="line.8"></a>
<span class="sourceLineNo">009</span> * attributes that are not recognized, and the JVM must ignore them.<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * @author Abe White<a name="line.11"></a>
<span class="sourceLineNo">012</span> */<a name="line.12"></a>
<span class="sourceLineNo">013</span>public class UnknownAttribute extends Attribute {<a name="line.13"></a>
<span class="sourceLineNo">014</span> private byte[] _value = new byte[0];<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span> UnknownAttribute(int nameIndex, Attributes owner) {<a name="line.16"></a>
<span class="sourceLineNo">017</span> super(nameIndex, owner);<a name="line.17"></a>
<span class="sourceLineNo">018</span> }<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span> int getLength() {<a name="line.20"></a>
<span class="sourceLineNo">021</span> return _value.length;<a name="line.21"></a>
<span class="sourceLineNo">022</span> }<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span> /**<a name="line.24"></a>
<span class="sourceLineNo">025</span> * The value is of unknown content, so it is stored as a byte array.<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span> public byte[] getValue() {<a name="line.27"></a>
<span class="sourceLineNo">028</span> return _value;<a name="line.28"></a>
<span class="sourceLineNo">029</span> }<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span> /**<a name="line.31"></a>
<span class="sourceLineNo">032</span> * The value is of unknown content, so it is stored as a byte array.<a name="line.32"></a>
<span class="sourceLineNo">033</span> */<a name="line.33"></a>
<span class="sourceLineNo">034</span> public void setValue(byte[] value) {<a name="line.34"></a>
<span class="sourceLineNo">035</span> if (value == null)<a name="line.35"></a>
<span class="sourceLineNo">036</span> value = new byte[0];<a name="line.36"></a>
<span class="sourceLineNo">037</span> _value = value;<a name="line.37"></a>
<span class="sourceLineNo">038</span> }<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span> public void acceptVisit(BCVisitor visit) {<a name="line.40"></a>
<span class="sourceLineNo">041</span> visit.enterUnknownAttribute(this);<a name="line.41"></a>
<span class="sourceLineNo">042</span> visit.exitUnknownAttribute(this);<a name="line.42"></a>
<span class="sourceLineNo">043</span> }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> void read(Attribute other) {<a name="line.45"></a>
<span class="sourceLineNo">046</span> setValue(((UnknownAttribute) other).getValue());<a name="line.46"></a>
<span class="sourceLineNo">047</span> }<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> void read(DataInput in, int length) throws IOException {<a name="line.49"></a>
<span class="sourceLineNo">050</span> _value = new byte[length];<a name="line.50"></a>
<span class="sourceLineNo">051</span> in.readFully(_value);<a name="line.51"></a>
<span class="sourceLineNo">052</span> }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> void write(DataOutput out, int length) throws IOException {<a name="line.54"></a>
<span class="sourceLineNo">055</span> out.write(_value);<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span>}<a name="line.57"></a>
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