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<pre><span class="sourceLineNo">001</span>package serp.bytecode.lowlevel;<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> * A String constant in the constant pool. String constants<a name="line.8"></a>
<span class="sourceLineNo">009</span> * hold a reference to a {@link UTF8Entry} that stores the actual value.<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 StringEntry extends Entry implements ConstantEntry {<a name="line.13"></a>
<span class="sourceLineNo">014</span> private int _stringIndex = -1;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span> /**<a name="line.16"></a>
<span class="sourceLineNo">017</span> * Default constructor.<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span> public StringEntry() {<a name="line.19"></a>
<span class="sourceLineNo">020</span> }<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span> /**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * Constructor.<a name="line.23"></a>
<span class="sourceLineNo">024</span> *<a name="line.24"></a>
<span class="sourceLineNo">025</span> * @param stringIndex the constant pool index of the {@link UTF8Entry}<a name="line.25"></a>
<span class="sourceLineNo">026</span> * containing the value of this string<a name="line.26"></a>
<span class="sourceLineNo">027</span> */<a name="line.27"></a>
<span class="sourceLineNo">028</span> public StringEntry(int stringIndex) {<a name="line.28"></a>
<span class="sourceLineNo">029</span> _stringIndex = stringIndex;<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> public int getType() {<a name="line.32"></a>
<span class="sourceLineNo">033</span> return Entry.STRING;<a name="line.33"></a>
<span class="sourceLineNo">034</span> }<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span> /**<a name="line.36"></a>
<span class="sourceLineNo">037</span> * Return the constant pool index of the {@link UTF8Entry}<a name="line.37"></a>
<span class="sourceLineNo">038</span> * storing the value of this string.<a name="line.38"></a>
<span class="sourceLineNo">039</span> */<a name="line.39"></a>
<span class="sourceLineNo">040</span> public int getStringIndex() {<a name="line.40"></a>
<span class="sourceLineNo">041</span> return _stringIndex;<a name="line.41"></a>
<span class="sourceLineNo">042</span> }<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> * Set the constant pool index of the {@link UTF8Entry}<a name="line.45"></a>
<span class="sourceLineNo">046</span> * storing the value of this string.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span> public void setStringIndex(int stringIndex) {<a name="line.48"></a>
<span class="sourceLineNo">049</span> Object key = beforeModify();<a name="line.49"></a>
<span class="sourceLineNo">050</span> _stringIndex = stringIndex;<a name="line.50"></a>
<span class="sourceLineNo">051</span> afterModify(key);<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> /**<a name="line.54"></a>
<span class="sourceLineNo">055</span> * Return the referenced {@link UTF8Entry}. This method can only<a name="line.55"></a>
<span class="sourceLineNo">056</span> * be run for entries that have been added to a constant pool.<a name="line.56"></a>
<span class="sourceLineNo">057</span> */<a name="line.57"></a>
<span class="sourceLineNo">058</span> public UTF8Entry getStringEntry() {<a name="line.58"></a>
<span class="sourceLineNo">059</span> return (UTF8Entry) getPool().getEntry(_stringIndex);<a name="line.59"></a>
<span class="sourceLineNo">060</span> }<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span> public Object getConstant() {<a name="line.62"></a>
<span class="sourceLineNo">063</span> return getStringEntry().getValue();<a name="line.63"></a>
<span class="sourceLineNo">064</span> }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> public void setConstant(Object value) {<a name="line.66"></a>
<span class="sourceLineNo">067</span> getStringEntry().setConstant(value);<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> public void acceptVisit(BCVisitor visit) {<a name="line.70"></a>
<span class="sourceLineNo">071</span> visit.enterStringEntry(this);<a name="line.71"></a>
<span class="sourceLineNo">072</span> visit.exitStringEntry(this);<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> void readData(DataInput in) throws IOException {<a name="line.75"></a>
<span class="sourceLineNo">076</span> _stringIndex = in.readUnsignedShort();<a name="line.76"></a>
<span class="sourceLineNo">077</span> }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span> void writeData(DataOutput out) throws IOException {<a name="line.79"></a>
<span class="sourceLineNo">080</span> out.writeShort(_stringIndex);<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span>}<a name="line.82"></a>
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