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package bjc.rgens.text.markov;
import java.util.Map;
/**
* A standalone Markov generator.
*
* @author bjculkin
*
*/
public class StandaloneMarkov {
private int ord;
private Map<String, Markov> hash;
private String first;
/**
* Create a new standalone Markov generator.
*
* @param order
* The order of this generator.
*
* @param markovHash
* The generators to use.
*
* @param firstSub
* The string to start out with.
*/
public StandaloneMarkov(int order, Map<String, Markov> markovHash, String firstSub) {
ord = order;
hash = markovHash;
first = firstSub;
}
/**
* Generate random text from the markov generator.
*
* @param charsToGenerate
* The number of characters of text to generate.
*
* @return The randomly generate text.
*/
public String generateTextFromMarkov(int charsToGenerate) {
StringBuilder text = new StringBuilder();
for (int i = ord; i < charsToGenerate; i++) {
if (i == ord) {
text.append(first);
if (text.length() > ord) i = text.length();
}
String sub = text.substring(i - ord, i);
Markov tmp = hash.get(sub);
if (tmp != null) {
Character nextChar = tmp.random();
text.append(nextChar);
} else {
i = ord - 1;
}
}
return text.toString();
}
}
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