URLNormalizers的注释全解大全

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URLNormalizers的注释全解大全

2024-07-23 17:21:05 212人阅读

URLNormalizers的注释写到：This class uses a "chainedfilter" pattern to run defined normalizers. 也就是要按配置中的顺序依次进行normalize：

publicString normalize(String urlString, String scope)

throwsMalformedURLException {

// optionally loop severaltimes, and break if no further changes

String initialString = urlString;

for (int k =0; k <loopCount; k++) {

for (int i =0; i <this.normalizers.length;i++) {

if(urlString ==null)

returnnull;

urlString = this.normalizers[i].normalize(urlString,scope);

}

if(initialString.equals(urlString))

break;

initialString = urlString;

}

returnurlString;

}

用normlizers中的 Normalizer对象进行规范化，到loopCount次或与上次规范化的结果已经没有差异了，那么停止。

Nutch 1.0 源代码分析［3］ Plugin(2)
　 21MAR 2010 12:59:55 +0800
----------------------------------------------------------------------------

在URLNormalizers构造函数中，有一句没有看：

this.extensionPoint =PluginRepository.get(conf).getExtensionPoint(

URLNormalizer.X_POINT_ID);

看一下PluginRepository.get函数：

public static synchronizedPluginRepository get(Configuration conf) {

PluginRepository result = CACHE.get(conf);

if (result ==null) {

result = newPluginRepository(conf);

CACHE.put(conf,result);

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URLNormalizers的注释全解大全

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URLNormalizers的注释全解大全

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