com.whaleal.icefrog.extra.tokenizer.AbstractResult Maven / Gradle / Ivy
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package com.whaleal.icefrog.extra.tokenizer;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* 对于未实现{@link Iterator}接口的普通结果类，装饰为{@link Result}
* 普通的结果类只需实现{@link #nextWord()} 即可
*
* @author Looly
* @author wh
*
*/
public abstract class AbstractResult implements Result{
private Word cachedWord;
@Override
public boolean hasNext() {
if (this.cachedWord != null) {
return true;
}
final Word next = nextWord();
if(null != next) {
this.cachedWord = next;
return true;
}
return false;
}
/**
* 下一个单词，通过实现此方法获取下一个单词，null表示无下一个结果。
* @return 下一个单词或null
*/
protected abstract Word nextWord();
@Override
public Word next() {
if (false == hasNext()) {
throw new NoSuchElementException("No more word !");
}
final Word currentWord = this.cachedWord;
this.cachedWord = null;
return currentWord;
}
@Override
public void remove() {
throw new UnsupportedOperationException("Jcseg result not allow to remove !");
}
@Override
public Iterator iterator() {
return this;
}
}