Example usage for org.apache.lucene.store RAMDirectory RAMDirectory

Introduction

In this page you can find the example usage for org.apache.lucene.store RAMDirectory RAMDirectory.

Prototype

public RAMDirectory() 

Source Link

Document

Constructs an empty Directory .

Usage

From source file:com.lorelib.analyzer.sample.LuceneIndexAndSearchDemo.java

License:Apache License

/**
 * /*from ww  w . j  a va2 s  .  c om*/
 * ???
 * @param args
 */
public static void main(String[] args) {
    //Lucene Document??
    String fieldName = "text";
    //
    String text = "IK Analyzer???????";

    //IKAnalyzer?
    Analyzer analyzer = new IKAnalyzer(true);

    Directory directory = null;
    IndexWriter iwriter = null;
    IndexReader ireader = null;
    IndexSearcher isearcher = null;
    try {
        //
        directory = new RAMDirectory();

        //?IndexWriterConfig
        IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
        iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
        iwriter = new IndexWriter(directory, iwConfig);
        //
        Document doc = new Document();
        doc.add(new StringField("ID", "10000", Field.Store.YES));
        doc.add(new TextField(fieldName, text, Field.Store.YES));
        iwriter.addDocument(doc);
        iwriter.close();

        //?**********************************
        //?
        ireader = DirectoryReader.open(directory);
        isearcher = new IndexSearcher(ireader);

        String keyword = "?";
        //QueryParser?Query
        QueryParser qp = new QueryParser(fieldName, analyzer);
        qp.setDefaultOperator(QueryParser.AND_OPERATOR);
        Query query = qp.parse(keyword);
        System.out.println("Query = " + query);

        //?5?
        TopDocs topDocs = isearcher.search(query, 5);
        System.out.println("" + topDocs.totalHits);
        //
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        for (int i = 0; i < topDocs.totalHits; i++) {
            Document targetDoc = isearcher.doc(scoreDocs[i].doc);
            System.out.println("" + targetDoc.toString());
        }

    } catch (CorruptIndexException e) {
        e.printStackTrace();
    } catch (LockObtainFailedException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ParseException e) {
        e.printStackTrace();
    } finally {
        if (ireader != null) {
            try {
                ireader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (directory != null) {
            try {
                directory.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

---

From source file:com.lucene.index.test.IKAnalyzerdemo.java

License:Apache License

/**
 * //from   www  .  j  a v a 2 s.c o m
 * ???
 * @param args
 */
public static void main(String[] args) {
    //Lucene Document??
    String fieldName = "text";
    //
    String text1 = "oracle,?";
    String text2 = "?";
    String text3 = "?";

    //IKAnalyzer?
    Analyzer analyzer = new IKAnalyzer();

    Directory directory1 = null;
    Directory directory2 = null;
    IndexWriter iwriter1 = null;
    IndexWriter iwriter2 = null;
    IndexReader ireader1 = null;
    IndexReader ireader2 = null;
    IndexSearcher isearcher = null;
    try {
        //
        directory1 = new RAMDirectory();
        directory2 = new RAMDirectory();

        //?IndexWriterConfig

        IndexWriterConfig iwConfig1 = new IndexWriterConfig(analyzer);
        iwConfig1.setOpenMode(OpenMode.CREATE);

        IndexWriterConfig iwConfig2 = new IndexWriterConfig(analyzer);
        iwConfig2.setOpenMode(OpenMode.CREATE);
        iwriter1 = new IndexWriter(directory1, iwConfig1);
        iwriter2 = new IndexWriter(directory2, iwConfig2);

        //
        Document doc1 = new Document();
        doc1.add(new StringField("ID", "10000", Field.Store.YES));
        doc1.add(new TextField("text1", text1, Field.Store.YES));
        iwriter1.addDocument(doc1);

        Document doc2 = new Document();
        doc2.add(new StringField("ID", "10001", Field.Store.YES));
        doc2.add(new TextField("text2", text2, Field.Store.YES));
        iwriter2.addDocument(doc2);

        iwriter1.close();
        iwriter2.close();

        //?**********************************
        //?   
        ireader1 = DirectoryReader.open(directory1);
        ireader2 = DirectoryReader.open(directory2);

        IndexReader[] mreader = { ireader1, ireader2 };

        MultiReader multiReader = new MultiReader(mreader);

        isearcher = new IndexSearcher(multiReader);

        String keyword = "?";
        //QueryParser?Query
        String[] fields = { "text1", "text2" };

        Map<String, Float> boosts = new HashMap<String, Float>();
        boosts.put("text1", 5.0f);
        boosts.put("text2", 2.0f);
        /**MultiFieldQueryParser??? 
         * */
        MultiFieldQueryParser parser = new MultiFieldQueryParser(fields, analyzer, boosts);
        Query query = parser.parse(keyword);

        System.out.println("Query = " + query);

        //?5?
        TopDocs topDocs = isearcher.search(query, 5);
        System.out.println("" + topDocs.totalHits);
        //
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        for (int i = 0; i < topDocs.totalHits; i++) {
            Document targetDoc = isearcher.doc(scoreDocs[i].doc);
            System.out.println("" + targetDoc.toString());
        }

    } catch (CorruptIndexException e) {
        e.printStackTrace();
    } catch (LockObtainFailedException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ParseException e) {
        e.printStackTrace();
    } finally {
        if (ireader1 != null) {
            try {
                ireader1.close();
                ireader2.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (directory1 != null) {
            try {
                directory1.close();
                directory2.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

---

From source file:com.lucene.index.test.IKAnalyzerdemoMutilField.java

License:Apache License

/**
 * /*w  ww.j a  v  a  2  s. co  m*/
 * ???
 * @param args
 */
public static void main(String[] args) {
    //Lucene Document??
    String fieldName = "text";
    //
    String text1 = "oracle?";
    String text2 = "?";
    String text3 = "?";

    //IKAnalyzer?
    Analyzer analyzer = new IKAnalyzer();

    Directory directory = null;
    IndexWriter iwriter = null;
    IndexReader ireader = null;
    IndexSearcher isearcher = null;
    try {
        //
        directory = new RAMDirectory();

        //?IndexWriterConfig

        IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
        iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
        iwriter = new IndexWriter(directory, iwConfig);
        //
        Document doc1 = new Document();
        doc1.add(new StringField("ID", "10000", Field.Store.YES));
        doc1.add(new TextField(fieldName, text1, Field.Store.YES));
        iwriter.addDocument(doc1);

        Document doc2 = new Document();
        doc2.add(new StringField("ID", "10000", Field.Store.YES));
        doc2.add(new TextField(fieldName, text2, Field.Store.YES));
        iwriter.addDocument(doc2);

        Document doc3 = new Document();
        doc3.add(new StringField("ID", "10000", Field.Store.YES));
        doc3.add(new TextField(fieldName, text3, Field.Store.YES));
        iwriter.addDocument(doc3);
        iwriter.close();

        //?**********************************
        //?   
        ireader = DirectoryReader.open(directory);
        isearcher = new IndexSearcher(ireader);

        String keyword = "?";
        //QueryParser?Query
        QueryParser qp = new QueryParser(fieldName, analyzer);
        qp.setDefaultOperator(QueryParser.AND_OPERATOR);
        Query query = qp.parse(keyword);
        System.out.println("Query = " + query);

        //?5?
        TopDocs topDocs = isearcher.search(query, 5);
        System.out.println("" + topDocs.totalHits);
        //
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        for (int i = 0; i < topDocs.totalHits; i++) {
            Document targetDoc = isearcher.doc(scoreDocs[i].doc);
            System.out.println("" + targetDoc.toString());
        }

    } catch (CorruptIndexException e) {
        e.printStackTrace();
    } catch (LockObtainFailedException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ParseException e) {
        e.printStackTrace();
    } finally {
        if (ireader != null) {
            try {
                ireader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (directory != null) {
            try {
                directory.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

---

From source file:com.mathworks.xzheng.advsearching.MultiPhraseQueryTest.java

License:Apache License

protected void setUp() throws Exception {
    Directory directory = new RAMDirectory();

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46,
            new WhitespaceAnalyzer(Version.LUCENE_46));
    IndexWriter writer = new IndexWriter(directory, config);
    Document doc1 = new Document();
    doc1.add(new Field("field", "the quick brown fox jumped over the lazy dog", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc1);//from   w w w  .  j a  v  a 2 s  . c  om
    Document doc2 = new Document();
    doc2.add(new Field("field", "the fast fox hopped over the hound", Field.Store.YES, Field.Index.ANALYZED));
    writer.addDocument(doc2);
    writer.close();

    searcher = new IndexSearcher(DirectoryReader.open(directory));
}

---

From source file:com.mathworks.xzheng.advsearching.MultiSearcherTest.java

License:Apache License

public void setUp() throws Exception {
    String[] animals = { "aardvark", "beaver", "coati", "dog", "elephant", "frog", "gila monster", "horse",
            "iguana", "javelina", "kangaroo", "lemur", "moose", "nematode", "orca", "python", "quokka", "rat",
            "scorpion", "tarantula", "uromastyx", "vicuna", "walrus", "xiphias", "yak", "zebra" };

    Analyzer analyzer = new WhitespaceAnalyzer(Version.LUCENE_46);

    Directory aTOmDirectory = new RAMDirectory(); // #1
    Directory nTOzDirectory = new RAMDirectory(); // #1

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, analyzer);

    IndexWriter aTOmWriter = new IndexWriter(aTOmDirectory, config);
    IndexWriter nTOzWriter = new IndexWriter(nTOzDirectory, config);

    for (int i = animals.length - 1; i >= 0; i--) {
        Document doc = new Document();
        String animal = animals[i];
        doc.add(new Field("animal", animal, Field.Store.YES, Field.Index.NOT_ANALYZED));
        if (animal.charAt(0) < 'n') {
            aTOmWriter.addDocument(doc); // #2
        } else {// w  w  w  .ja  va 2  s.c o  m
            nTOzWriter.addDocument(doc); // #2
        }
    }

    aTOmWriter.close();
    nTOzWriter.close();

    searchers = new IndexSearcher[2];
    searchers[0] = new IndexSearcher(DirectoryReader.open(aTOmDirectory));
    searchers[1] = new IndexSearcher(DirectoryReader.open(nTOzDirectory));
}

---

From source file:com.mathworks.xzheng.advsearching.SecurityFilterTest.java

License:Apache License

protected void setUp() throws Exception {
    Directory directory = new RAMDirectory();

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46,
            new WhitespaceAnalyzer(Version.LUCENE_46));
    IndexWriter writer = new IndexWriter(directory, config);

    Document document = new Document(); // 1
    document.add(new Field("owner", // 1
            "elwood", // 1
            Field.Store.YES, // 1
            Field.Index.NOT_ANALYZED)); // 1
    document.add(new Field("keywords", // 1
            "elwood's sensitive info", // 1
            Field.Store.YES, // 1
            Field.Index.ANALYZED)); // 1
    writer.addDocument(document);/*  w  w w .  java2  s  .co  m*/

    document = new Document(); // 2
    document.add(new Field("owner", // 2
            "jake", // 2
            Field.Store.YES, // 2
            Field.Index.NOT_ANALYZED)); // 2
    document.add(new Field("keywords", // 2
            "jake's sensitive info", // 2
            Field.Store.YES, // 2
            Field.Index.ANALYZED)); // 2
    writer.addDocument(document);

    writer.close();
    searcher = new IndexSearcher(DirectoryReader.open(directory));
}

---

From source file:com.mathworks.xzheng.advsearching.SpanQueryTest.java

License:Apache License

protected void setUp() throws Exception {
    directory = new RAMDirectory();

    analyzer = new WhitespaceAnalyzer(Version.LUCENE_46);

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, analyzer);

    IndexWriter writer = new IndexWriter(directory, config);

    Document doc = new Document();
    doc.add(new Field("f", "the quick brown fox jumps over the lazy dog", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc);//from   w  ww.ja  v a  2s  .c om

    doc = new Document();
    doc.add(new Field("f", "the quick red fox jumps over the sleepy cat", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc);

    writer.close();

    searcher = new IndexSearcher(DirectoryReader.open(directory));
    reader = searcher.getIndexReader();

    quick = new SpanTermQuery(new Term("f", "quick"));
    brown = new SpanTermQuery(new Term("f", "brown"));
    red = new SpanTermQuery(new Term("f", "red"));
    fox = new SpanTermQuery(new Term("f", "fox"));
    lazy = new SpanTermQuery(new Term("f", "lazy"));
    sleepy = new SpanTermQuery(new Term("f", "sleepy"));
    dog = new SpanTermQuery(new Term("f", "dog"));
    cat = new SpanTermQuery(new Term("f", "cat"));
}

---

From source file:com.mathworks.xzheng.analysis.codec.MetaphoneAnalyzerTest.java

License:Apache License

public void testKoolKat() throws Exception {
    RAMDirectory directory = new RAMDirectory();
    Analyzer analyzer = new MetaphoneReplacementAnalyzer();

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, analyzer);
    config.setOpenMode(IndexWriterConfig.OpenMode.CREATE);

    IndexWriter writer = new IndexWriter(directory, config);

    Document doc = new Document();
    doc.add(new Field("contents", //#A
            "cool cat", Field.Store.YES, Field.Index.ANALYZED));
    writer.addDocument(doc);/*ww w  .  j  a va 2  s.  c o m*/
    writer.close();

    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(directory));

    Query query = new QueryParser(Version.LUCENE_46, //#B
            "contents", analyzer) //#B
                    .parse("kool kat"); //#B

    TopDocs hits = searcher.search(query, 1);
    assertEquals(1, hits.totalHits); //#C
    int docID = hits.scoreDocs[0].doc;
    doc = searcher.doc(docID);
    assertEquals("cool cat", doc.get("contents")); //#D

}

---

From source file:com.mathworks.xzheng.analysis.keyword.KeywordAnalyzerTest.java

License:Apache License

public void setUp() throws Exception {
    Directory directory = new RAMDirectory();

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, new SimpleAnalyzer(Version.LUCENE_46));

    IndexWriter writer = new IndexWriter(directory, config);

    Document doc = new Document();
    doc.add(new Field("partnum", "Q36", Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS)); //A
    doc.add(new Field("description", "Illidium Space Modulator", Field.Store.YES, Field.Index.ANALYZED));
    writer.addDocument(doc);//w ww .j ava  2 s . c  o m

    writer.close();

    searcher = new IndexSearcher(DirectoryReader.open(directory));
}

---

From source file:com.mathworks.xzheng.analysis.positional.PositionalPorterStopAnalyzerTest.java

License:Apache License

public void setUp() throws Exception {

    RAMDirectory directory = new RAMDirectory();
    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, porterAnalyzer);
    IndexWriter writer = new IndexWriter(directory, config);

    Document doc = new Document();
    doc.add(new Field("contents", "The quick brown fox jumps over the lazy dog", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc);//from www . j  ava 2s  . c o m
    writer.close();
    searcher = new IndexSearcher(DirectoryReader.open(directory));
    parser = new QueryParser(Version.LUCENE_46, "contents", porterAnalyzer);
}

---

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