33 lines
959 B
Java
33 lines
959 B
Java
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package org.thdl.lucene;
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import org.apache.lucene.analysis.*;
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import java.text.DecimalFormat;
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import java.io.*;
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public class NumberPadder extends TokenFilter {
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public static final String NUMBER_TYPE = "Number";
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private static final DecimalFormat formatter = new DecimalFormat("0000000000");
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public static String pad(int n) {
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return formatter.format(n);
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}
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public NumberPadder(TokenStream input) {
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super(input);
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}
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public Token next() throws IOException {
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Token token = input.next();
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if (token == null)
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return null;
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try {
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int i = Integer.parseInt(token.termText());
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Token replace = new Token(pad(i), token.startOffset(), token.endOffset(), NUMBER_TYPE);
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replace.setPositionIncrement(token.getPositionIncrement());
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return replace;
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} catch (NumberFormatException nfe) {
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return token;
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}
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}
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}
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