Nutch索引

NutchField

package org.apache.nutch.indexer;

class NutchField implements Writable {
    float weight;
    List values;
}

Metadata

package org.apache.nutch.metadata

class Metadata {
    Map metadata;
}

NutchDocument

package org.apache.nutch.indexer;

class NutchDocument {
    byte Version = 2;
    Map fields;
    Metadata documentMeta;
    float weight;
}

Nutch建立索引的过程中，将会把NutchDocument转换为Lucene的Document对象进行索引。