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package org.marketchangers.prayer.lucene;
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import java.io.IOException;
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import java.util.Collection;
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import java.util.Date;
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import java.util.Iterator;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.document.DateField;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.IndexWriter;
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import org.apache.lucene.index.Term;
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import org.apache.lucene.queryParser.MultiFieldQueryParser;
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import org.apache.lucene.queryParser.ParseException;
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import org.apache.lucene.search.BooleanQuery;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.RangeQuery;
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import org.apache.lucene.search.Searcher;
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import org.apache.lucene.search.TermQuery;
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import org.apache.lucene.store.Directory;
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import org.marketchangers.prayer.PrayerRequest;
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import org.marketchangers.prayer.PrayerRequestQuery;
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public class DefaultIndexProvider implements IndexProvider {
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private Directory directory;
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private Analyzer analyzer;
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public DefaultIndexProvider(Directory directory, Analyzer analyzer) {
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this.directory = directory;
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this.analyzer = analyzer;
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}
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public IndexReader getReader() throws IOException {
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return IndexReader.open(directory);
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}
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public Searcher getSearcher() throws IOException {
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return new IndexSearcher(directory);
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}
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public IndexWriter getWriter() throws IOException {
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return new IndexWriter(directory, analyzer, shouldCreate());
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}
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private boolean shouldCreate() throws IOException {
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return directory.list().length == 0;
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}
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public Document translateToDocument(PrayerRequest request) {
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Document document = new Document();
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keyword(document, "category", request.getCategory());
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keyword(document, "endDate", request.getEndDate());
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keyword(document, "id", request.getId());
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keyword(document, "requestorUserId", request.getRequestorUserId());
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keyword(document, "startDate", request.getStartDate());
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keyword(document, "status", request.getStatus());
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unstored(document, "background", request.getBackground());
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unstored(document, "content", request.getContent());
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unstored(document, "subject", request.getSubject());
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keyword(document, "catchAll", "catchAll");
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return document;
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}
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private void unstored(Document d, String name, Object value) {
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if (value != null)
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d.add(Field.UnStored(name, value.toString()));
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}
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private void keyword(Document d, String name, Date value) {
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if (value != null)
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d.add(Field.Keyword(name, value));
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}
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private void keyword(Document d, String name, Object value) {
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if (value != null) {
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d.add(Field.Keyword(name, value.toString()));
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} else {
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d.add(Field.Keyword(name, ""));
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}
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}
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public Query translateToQuery(PrayerRequestQuery q) {
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BooleanQuery query = new BooleanQuery();
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if (q.hasCategoryName()) {
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query.add(categoryName(q.getCategoryName()), true, false);
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}
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if (q.hasEndDate()) {
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query.add(endDate(q.getEndDate()), true, false);
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}
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if (q.hasRequestorUserIds()) {
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query.add(requestorUserIds(q.getRequestorUserIds()), true, false);
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}
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if (q.hasSearchTerms()) {
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query.add(searchTerms(q.getSearchTerms()), true, false);
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}
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if (q.hasStartDate()) {
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query.add(startDate(q.getStartDate()), true, false);
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}
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if (q.hasStatus()) {
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query.add(status(q.getStatus()), true, false);
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}
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return query;
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}
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public Query translateToQuery(PrayerRequest r) {
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BooleanQuery query = new BooleanQuery();
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if (r.getCategory() != null) {
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if (r.getCategory().getName() != null) {
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query.add(categoryName(r.getCategory().getName()), true, false);
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}
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}
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if (r.getEndDate() != null) {
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query.add(endDate(r.getEndDate()), true, false);
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}
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if (r.getRequestorUserId() != null) {
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query.add(requestorUserId(r.getRequestorUserId()), true, false);
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}
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if (r.getContent() != null) {
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query.add(searchTerms(r.getContent()), true, false);
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}
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if (r.getStartDate() != null) {
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query.add(startDate(r.getStartDate()), true, false);
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}
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return query;
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}
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private Query all() {
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return new TermQuery(new Term("catchAll", "catchAll"));
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}
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private Query categoryName(String categoryName) {
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return new TermQuery(new Term("category", categoryName));
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}
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private Query endDate(Date date) {
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Term upperTerm = new Term("endDate", DateField.dateToString(date));
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return new RangeQuery(null, upperTerm, true);
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}
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private Query requestorUserId(String requestorUserId) {
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return new TermQuery(new Term("requestorUserId", requestorUserId));
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}
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private Query requestorUserIds(Collection requestors) {
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BooleanQuery query = new BooleanQuery();
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Iterator requestorUserIds = requestors.iterator();
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while (requestorUserIds.hasNext()) {
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String requestorUserId = (String) requestorUserIds.next();
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query.add(requestorUserId(requestorUserId), false, false);
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}
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return query;
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}
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private Query searchTerms(String searchTerms) {
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String[] fields = { "background", "content", "subject" };
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try {
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return MultiFieldQueryParser.parse(searchTerms, fields, analyzer);
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} catch (ParseException pe) {
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0
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return all();
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}
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}
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private Query startDate(Date date) {
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Term lowerTerm = new Term("startDate", DateField.dateToString(date));
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return new RangeQuery(lowerTerm, null, true);
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}
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private Query status(String status) {
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return new TermQuery(new Term("status", status));
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}
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}
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