/home/palakars/workspace-inprogress/code-in-progress/aitools3/aitools3-aq-invertedindex2-java/src/de/aitools/aq/invertedindex/usage/UsingSearcher.java

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// Copyright (C) 2011 webis.de. All rights reserved.
package de.aitools.aq.invertedindex.usage;

import java.io.File;
import java.util.Iterator;

import de.aitools.aq.invertedindex.core.Configuration;
import de.aitools.aq.invertedindex.core.Postlist;
import de.aitools.aq.invertedindex.core.Searcher;
import de.aitools.aq.value.single.SingleLong;

public class UsingSearcher {

        public static void main(String[] args) {
                
                // ---------------------------------------------------------------------
                // Setup your index directory
                // ---------------------------------------------------------------------
                Configuration config = new Configuration();
                config.setIndexDirectory(new File("/path/to/your/index"));
                
                // ---------------------------------------------------------------------
                // Open the inverted index
                // ---------------------------------------------------------------------
                Class<SingleLong> valueClass = SingleLong.class;
                Searcher<SingleLong> searcher = Searcher.open(valueClass, config);
                
                // ---------------------------------------------------------------------
                // Search the inverted index
                // ---------------------------------------------------------------------
                String key = "key123";
                
                // Lookup the entire postlist over the range [0, length)
                Postlist<SingleLong> postlist = searcher.search(key);
                if (postlist != null) {
                        postlist.getHead().print(System.out).println();
                        Iterator<SingleLong> iter = postlist.iterator();
                        while (iter.hasNext()) {
                                iter.next().printTo(System.out).println();
                        }
                        postlist.deleteNative(); // This is essential, do not forget !
                }
                
                // Lookup a partial postlist over the range [0, 10)
                postlist = searcher.search(key, 10);
                if (postlist != null) {
                        postlist.getHead().print(System.out).println();
                        Iterator<SingleLong> iter = postlist.iterator();
                        while (iter.hasNext()) {
                                iter.next().printTo(System.out).println();
                        }
                        postlist.deleteNative(); // This is essential, do not forget !
                }
                
                // Lookup a partial postlist over the range [10, 20)
                postlist = searcher.search(key, 10, 10);
                if (postlist != null) {
                        postlist.getHead().print(System.out).println();
                        Iterator<SingleLong> iter = postlist.iterator();
                        while (iter.hasNext()) {
                                iter.next().printTo(System.out).println();
                        }
                        postlist.deleteNative(); // This is essential, do not forget !
                }
                
                searcher.close();
        }
}

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