Example usage for org.apache.lucene.search BooleanQuery BooleanQuery

Introduction

In this page you can find the example usage for org.apache.lucene.search BooleanQuery BooleanQuery.

Prototype

BooleanQuery

Source Link

Usage

From source file:com.esri.gpt.server.assertion.handler.AsnCommentHandler.java

License:Apache License

/**
 * Queries comments.//from  ww w . jav a  2s  . c o m
 * @param context the assertion operation context
 * @throws Exception if an exception occurs
 */
private void query(AsnContext context) throws Exception {

    // initialize
    AsnOperation operation = context.getOperation();
    AsnAssertionSet asnSet = operation.getAssertionSet();
    AsnValueType vType = asnSet.getValueType();
    String subject = operation.getSubject().getURN();
    String predicate = vType.getRdfPredicate();

    // build a query to match all occurrences of the subject/predicate pair
    BooleanQuery query = new BooleanQuery();
    Query qSubject = new TermQuery(new Term(AsnConstants.FIELD_RDF_SUBJECT, subject));
    Query qPredicate = new TermQuery(new Term(AsnConstants.FIELD_RDF_PREDICATE, predicate));
    query.add(qSubject, BooleanClause.Occur.MUST);
    query.add(qPredicate, BooleanClause.Occur.MUST);

    // sort on descending timestamp
    String tsField = AsnConstants.FIELD_SYS_TIMESTAMP;
    Sort sortOption = new Sort(new SortField(tsField, SortField.STRING, true));

    // determine the start and end positions
    int startRecord = context.getRequestOptions().getStartRecord() - 1;
    int maxRecords = context.getRequestOptions().getMaxRecords();
    if (startRecord < 0)
        startRecord = 0;
    int recordsPerPage = maxRecords;
    if (recordsPerPage <= 0)
        recordsPerPage = 1;
    int hitsToReturn = startRecord + recordsPerPage;
    int nextRecord = 0;
    int numDocs = 0;

    IndexReader reader = null;
    IndexSearcher searcher = null;
    try {

        // make the reader and searcher, execute the search
        reader = this.getIndexAdapter().makeIndexReader();
        searcher = new IndexSearcher(reader);
        TopDocs topDocs = searcher.search(query, null, hitsToReturn, sortOption);
        ScoreDoc[] scoreDocs = null;
        int totalHits = topDocs.totalHits;
        if (maxRecords > 0) {
            scoreDocs = topDocs.scoreDocs;
            if ((scoreDocs != null) && (scoreDocs.length) > 0) {
                numDocs = scoreDocs.length;
                if (totalHits > numDocs) {
                    nextRecord = numDocs + 1;
                }
            }
        }

        // root property for the response
        String rootSubject = subject;
        String roorPredicate = operation.getPredicate().getURN() + "response";
        AsnProperty rootProp = new AsnProperty(rootSubject, roorPredicate, null);

        // hit count and next record
        String queryPfx = asnSet.getURNPrefix() + ":query";
        rootProp.getChildren().add(new AsnProperty(null, queryPfx + ":hits", "" + totalHits));
        if (nextRecord > 0) {
            rootProp.getChildren().add(new AsnProperty(null, queryPfx + ":nextRecord", "" + nextRecord));
        }

        // canCreate capability for the active user
        String canCreatePred = asnSet.getURNPrefix() + ":activeUser:canCreate";
        String canCreateVal = "" + context.getAuthorizer().canCreate(context, asnSet.getAuthPolicy());
        rootProp.getChildren().add(new AsnProperty(null, canCreatePred, canCreateVal));

        // process the documents, generate the response
        AsnAssertionRenderer renderer = new AsnAssertionRenderer();
        for (int i = startRecord; i < numDocs; i++) {
            Document document = reader.document(scoreDocs[i].doc);
            Assertion assertion = asnSet.newAssertion(context, false);
            assertion.load(document);
            rootProp.getChildren().add(renderer.makeProperty(context, assertion));
        }
        context.getOperationResponse().generateResponse(context, rootProp.getChildren());

    } finally {
        this.getIndexAdapter().closeReader(reader);
        this.getIndexAdapter().closeSearcher(searcher);
    }

}

---

From source file:com.esri.gpt.server.assertion.index.AsnIndexAdapter.java

License:Apache License

/**
 * Returns a hit count for a subject, predicate and value combination.
 * <br/>This will only work correctly for values that have not been analyzed 
 * prior to indexing./* w w  w . j  ava  2  s. co  m*/
 * @param context the assertion operation context
 * @param searcher the index searcher
 * @param valueField the value field name
 * @param subject the subject
 * @param predicate the predicate
 * @param value the value
 * @return the cardinality
 * @throws CorruptIndexException if the index is corrupt
 * @throws IOException if an I/O exception occurs
 */
public long count(AsnContext context, IndexSearcher searcher, String valueField, String subject,
        String predicate, String value) throws CorruptIndexException, IOException {

    // build a query to match the subject/predicate/value triple
    BooleanQuery query = new BooleanQuery();
    Query qSubject = new TermQuery(new Term(AsnConstants.FIELD_RDF_SUBJECT, subject));
    Query qPredicate = new TermQuery(new Term(AsnConstants.FIELD_RDF_PREDICATE, predicate));
    Query qValue = new TermQuery(new Term(valueField, value));
    query.add(qSubject, BooleanClause.Occur.MUST);
    query.add(qPredicate, BooleanClause.Occur.MUST);
    query.add(qValue, BooleanClause.Occur.MUST);

    // execute the search, return the hits
    TopDocs topDocs = searcher.search(query, 1);
    return topDocs.totalHits;
}

---

From source file:com.esri.gpt.server.assertion.index.AsnIndexAdapter.java

License:Apache License

/**
 * Loads the assertion previously cast for the active subject, predicate and user.
 * @param context the assertion operation context
 * @param searcher the index searcher/*from   ww w . j a  v  a2 s  . c  om*/
 * @return the previously cast assertion (can be null)
 * @throws Exception if an exception occurs
 */
public Assertion loadPreviousUserAssertion(AsnContext context, IndexSearcher searcher) throws Exception {
    AsnOperation operation = context.getOperation();
    String userKey = Val.chkStr(operation.getUserPart().getKey());
    String username = Val.chkStr(operation.getUserPart().getName());
    boolean isAnonymous = username.equalsIgnoreCase(AsnConstants.ANONYMOUS_USERNAME);
    if (!isAnonymous && (userKey.length() > 0)) {
        AsnAssertionSet asnSet = operation.getAssertionSet();
        AsnValueType vType = asnSet.getValueType();
        String subject = operation.getSubject().getURN();
        String predicate = vType.getRdfPredicate();

        // build a query to match the subject/predicate/user triple
        BooleanQuery query = new BooleanQuery();
        Query qSubject = new TermQuery(new Term(AsnConstants.FIELD_RDF_SUBJECT, subject));
        Query qPredicate = new TermQuery(new Term(AsnConstants.FIELD_RDF_PREDICATE, predicate));
        Query qUserKey = new TermQuery(new Term(AsnConstants.FIELD_USER_KEY, userKey));
        query.add(qSubject, BooleanClause.Occur.MUST);
        query.add(qPredicate, BooleanClause.Occur.MUST);
        query.add(qUserKey, BooleanClause.Occur.MUST);

        // make the reader and searcher, execute the search, return the previous assertion
        TopDocs topDocs = searcher.search(query, 1);
        ScoreDoc[] scoreDocs = topDocs.scoreDocs;
        if ((scoreDocs != null) && (scoreDocs.length) > 0) {
            Document document = searcher.getIndexReader().document(scoreDocs[0].doc);
            Assertion assertion = asnSet.newAssertion(context, false);
            assertion.load(document);
            return assertion;
        }
    }
    return null;
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
 * query/*from   www  .j a  v a  2  s  .c o  m*/
 * ?Query?
 * @param queries
 * @return
 */
private static Query optimizeQueries(List<Query> queries) {
    //??branch query
    if (queries.size() == 0) {
        return null;
    } else if (queries.size() == 1) {
        return queries.get(0);
    } else {
        BooleanQuery mustQueries = new BooleanQuery();
        for (Query q : queries) {
            mustQueries.add(q, Occur.MUST);
        }
        return mustQueries;
    }
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
/**//  ww w .  j ava 2s  .  c  om
 * ??,?Field?
 * @param field -- Document field name
 * @param query -- keyword
 * @return Query 
 * @throws IOException
 */
public static Query parse(String field, String query) throws IOException {
    if (field == null) {
        throw new IllegalArgumentException("parameter \"field\" is null");
    }
    String[] qParts = query.split("\\s");
    if (qParts.length > 1) {
        BooleanQuery resultQuery = new BooleanQuery();
        for (String q : qParts) {
            //?
            if ("".equals(q)) {
                continue;
            }
            Query partQuery = _parse(field, q);
            if (partQuery != null && (!(partQuery instanceof BooleanQuery)
                    || ((BooleanQuery) partQuery).getClauses().length > 0)) {
                resultQuery.add(partQuery, Occur.SHOULD);
            }
        }
        return resultQuery;
    } else {
        return _parse(field, query);
    }
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
 * Field,???/*from  ww w.ja  v a2 s  . c  om*/
 * @param fields -- Document fields name
 * @param query   -- keyword
 * @return Query 
 * @throws IOException
 */
public static Query parseMultiField(String[] fields, String query) throws IOException {
    if (fields == null) {
        throw new IllegalArgumentException("parameter \"fields\" is null");
    }
    BooleanQuery resultQuery = new BooleanQuery();
    for (String field : fields) {
        if (field != null) {
            Query partQuery = parse(field, query);
            if (partQuery != null && (!(partQuery instanceof BooleanQuery)
                    || ((BooleanQuery) partQuery).getClauses().length > 0)) {
                resultQuery.add(partQuery, Occur.SHOULD);
            }
        }
    }
    return resultQuery;
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
 * Field,??,Occur?/*from   w ww .j av a 2 s  .  c  om*/
 * @param fields -- Document fields name
 * @param query   -- keyword
 * @param flags -- BooleanClause
 * @return Query 
 * @throws IOException
 */
public static Query parseMultiField(String[] fields, String query, BooleanClause.Occur[] flags)
        throws IOException {
    if (fields == null) {
        throw new IllegalArgumentException("parameter \"fields\" is null");
    }
    if (flags == null) {
        throw new IllegalArgumentException("parameter \"flags\" is null");
    }

    if (flags.length != fields.length) {
        throw new IllegalArgumentException("flags.length != fields.length");
    }

    BooleanQuery resultQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++) {
        if (fields[i] != null) {
            Query partQuery = parse(fields[i], query);
            if (partQuery != null && (!(partQuery instanceof BooleanQuery)
                    || ((BooleanQuery) partQuery).getClauses().length > 0)) {
                resultQuery.add(partQuery, flags[i]);
            }
        }
    }
    return resultQuery;
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
 * Field??// w  ww  . j  av a2  s.com
 * @param fields
 * @param queries
 * @return Query 
 * @throws IOException 
 */
public static Query parseMultiField(String[] fields, String[] queries) throws IOException {
    if (fields == null) {
        throw new IllegalArgumentException("parameter \"fields\" is null");
    }
    if (queries == null) {
        throw new IllegalArgumentException("parameter \"queries\" is null");
    }
    if (queries.length != fields.length) {
        throw new IllegalArgumentException("queries.length != fields.length");
    }
    BooleanQuery resultQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++) {
        if (fields[i] != null) {
            Query partQuery = parse(fields[i], queries[i]);
            if (partQuery != null && (!(partQuery instanceof BooleanQuery)
                    || ((BooleanQuery) partQuery).getClauses().length > 0)) {
                resultQuery.add(partQuery, Occur.SHOULD);
            }
        }
    }
    return resultQuery;
}

---

From source file:com.ewcms.content.document.util.analyzer.lucene.IKQueryParser.java

License:Open Source License

/**
 * Field,?,Occur?/*from   w  w w  .  j av  a 2 s.c  o  m*/
 * @param fields
 * @param queries
 * @param flags
 * @return Query 
 * @throws IOException
 */
public static Query parseMultiField(String[] fields, String[] queries, BooleanClause.Occur[] flags)
        throws IOException {
    if (fields == null) {
        throw new IllegalArgumentException("parameter \"fields\" is null");
    }
    if (queries == null) {
        throw new IllegalArgumentException("parameter \"queries\" is null");
    }
    if (flags == null) {
        throw new IllegalArgumentException("parameter \"flags\" is null");
    }

    if (!(queries.length == fields.length && queries.length == flags.length)) {
        throw new IllegalArgumentException("queries, fields, and flags array have have different length");
    }

    BooleanQuery resultQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++) {
        if (fields[i] != null) {
            Query partQuery = parse(fields[i], queries[i]);
            if (partQuery != null && (!(partQuery instanceof BooleanQuery)
                    || ((BooleanQuery) partQuery).getClauses().length > 0)) {
                resultQuery.add(partQuery, flags[i]);
            }
        }
    }
    return resultQuery;
}

---

From source file:com.flaptor.hounder.searcher.query.AndQuery.java

License:Apache License

@Override
public org.apache.lucene.search.Query getLuceneQuery() {
    BooleanQuery bq = new BooleanQuery();
    if (leftTerm instanceof AndQuery) {
        for (BooleanClause bc : ((BooleanQuery) leftTerm.getLuceneQuery()).getClauses()) {
            bq.add(bc);/*ww  w . ja v  a 2 s  . c  o m*/
        }
    } else {
        bq.add(leftTerm.getLuceneQuery(), BooleanClause.Occur.MUST);
    }
    if (rightTerm instanceof AndQuery) {
        for (BooleanClause bc : ((BooleanQuery) rightTerm.getLuceneQuery()).getClauses()) {
            bq.add(bc);
        }
    } else {
        bq.add(rightTerm.getLuceneQuery(), BooleanClause.Occur.MUST);
    }

    bq.setBoost(boost);
    return bq;
}

---

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