com.orientechnologies.lucene.OLuceneIndexType.java Source code

Introduction

Here is the source code for com.orientechnologies.lucene.OLuceneIndexType.java

Source

/*
 * Copyright 2014 Orient Technologies.
 *
 * Licensed 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 com.orientechnologies.lucene;

import com.orientechnologies.lucene.manager.OLuceneIndexManagerAbstract;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.index.OCompositeKey;
import com.orientechnologies.orient.core.index.OIndexDefinition;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.*;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.*;
import org.apache.lucene.util.Version;

import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by enricorisa on 21/03/14.
 */
public class OLuceneIndexType {

    public static Field createField(String fieldName, Object value, Field.Store store, Field.Index analyzed) {
        Field field = null;

        if (value instanceof Number) {
            Number number = (Number) value;
            if (value instanceof Long) {
                field = new LongField(fieldName, number.longValue(), store);
            } else if (value instanceof Float) {
                field = new FloatField(fieldName, number.floatValue(), store);
            } else if (value instanceof Double) {
                field = new DoubleField(fieldName, number.doubleValue(), store);
            } else {
                field = new IntField(fieldName, number.intValue(), store);
            }
        } else if (value instanceof Date) {
            field = new LongField(fieldName, ((Date) value).getTime(), store);

        } else {
            field = new Field(fieldName, value.toString(), store, analyzed);

        }
        return field;
    }

    public static Query createExactQuery(OIndexDefinition index, Object key) {

        Query query = null;
        if (key instanceof String) {
            BooleanQuery booleanQ = new BooleanQuery();
            if (index.getFields().size() > 0) {
                for (String idx : index.getFields()) {
                    booleanQ.add(new TermQuery(new Term(idx, key.toString())), BooleanClause.Occur.SHOULD);
                }
            } else {
                booleanQ.add(new TermQuery(new Term(OLuceneIndexManagerAbstract.KEY, key.toString())),
                        BooleanClause.Occur.SHOULD);
            }
            query = booleanQ;
        } else if (key instanceof OCompositeKey) {
            BooleanQuery booleanQ = new BooleanQuery();
            int i = 0;
            OCompositeKey keys = (OCompositeKey) key;
            for (String idx : index.getFields()) {
                String val = (String) keys.getKeys().get(i);
                booleanQ.add(new TermQuery(new Term(idx, val)), BooleanClause.Occur.MUST);
                i++;

            }
            query = booleanQ;
        }
        return query;
    }

    public static Query createQueryId(OIdentifiable value) {
        return new TermQuery(new Term(OLuceneIndexManagerAbstract.RID, value.toString()));
    }

    public static Query createDeleteQuery(OIdentifiable value, List<String> fields, Object key) {

        BooleanQuery booleanQuery = new BooleanQuery();

        booleanQuery.add(new TermQuery(new Term(OLuceneIndexManagerAbstract.RID, value.toString())),
                BooleanClause.Occur.MUST);

        Map<String, String> values = new HashMap<String, String>();
        // TODO Implementation of Composite keys with Collection
        if (key instanceof OCompositeKey) {

        } else {
            values.put(fields.iterator().next(), key.toString());
        }
        for (String s : values.keySet()) {
            booleanQuery.add(new TermQuery(new Term(s + OLuceneIndexManagerAbstract.STORED, values.get(s))),
                    BooleanClause.Occur.MUST);
        }
        return booleanQuery;
    }

    public static Query createFullQuery(OIndexDefinition index, Object key, Analyzer analyzer, Version version)
            throws ParseException {

        String query = "";
        if (key instanceof OCompositeKey) {
            Object params = ((OCompositeKey) key).getKeys().get(0);
            if (params instanceof Map) {
                Object q = ((Map) params).get("q");
                if (q != null) {
                    query = q.toString();
                }
            } else {
                query = params.toString();

            }
        } else {
            query = key.toString();
        }

        return getQueryParser(index, query, analyzer, version);

    }

    protected static Query getQueryParser(OIndexDefinition index, String key, Analyzer analyzer, Version version)
            throws ParseException {
        QueryParser queryParser;
        if ((key).startsWith("(")) {
            queryParser = new QueryParser(version, "", analyzer);

        } else {
            String[] fields = null;
            if (index.isAutomatic()) {
                fields = index.getFields().toArray(new String[index.getFields().size()]);
            } else {
                int length = index.getTypes().length;

                fields = new String[length];
                for (int i = 0; i < length; i++) {
                    fields[i] = "k" + i;
                }
            }
            queryParser = new MultiFieldQueryParser(version, fields, analyzer);
        }

        return queryParser.parse(key);
    }

    public static Sort sort(Query query, OIndexDefinition index, boolean ascSortOrder) {
        String key = index.getFields().iterator().next();
        Number number = ((NumericRangeQuery) query).getMin();
        number = number != null ? number : ((NumericRangeQuery) query).getMax();
        SortField.Type fieldType = SortField.Type.INT;
        if (number instanceof Long) {
            fieldType = SortField.Type.LONG;
        } else if (number instanceof Float) {
            fieldType = SortField.Type.FLOAT;
        } else if (number instanceof Double) {
            fieldType = SortField.Type.DOUBLE;
        }

        return new Sort(new SortField(key, fieldType, ascSortOrder));
    }

}