Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.gobblin.ingestion.google.webmaster; import java.util.Iterator; import org.apache.commons.lang3.tuple.Triple; /** * Package the URL pages/nodes into groups given the group size while traversing the UrlTrie by utilizing a TrieIterator. If the current node is not a "leaf" node defined by the TrieIterator, then a "fake" group of size 1 will be created by only including this node. * * Iterating the groups with a Triple type return value: * * Triple.1 is this group's root URL. The full URL to the root node of the group. * Triple.2 is the FilterOperator type for this group. * case 1. If the descendants of this group is <= groupSize, the operator is FilterOperator.CONTAINS. This is a real group. * case 2. Otherwise, the node will only be returned if it exists, with the operator FilterOperator.EQUALS. This group is actually a single value. * Triple.3 is the root node of this group. */ public interface UrlGrouper extends Iterator<Triple<String, GoogleWebmasterFilter.FilterOperator, UrlTrieNode>> { int getGroupSize(); }