com.esri.gpt.control.georss.FieldMetaLoader.java Source code

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Here is the source code for com.esri.gpt.control.georss.FieldMetaLoader.java

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package com.esri.gpt.control.georss;

import com.esri.gpt.catalog.context.CatalogIndexException;
import com.esri.gpt.catalog.lucene.LuceneIndexAdapter;
import com.esri.gpt.framework.context.RequestContext;
import com.esri.gpt.framework.util.Val;
import java.util.List;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.IndexSearcher;

/**
 * Field meta loader.
 */
public class FieldMetaLoader {
    /**
     * Loads Lucene index metadata.
     * @param context request context
     * @param fields list of fields
     * @throws CatalogIndexException if accessing index fails
     */
    public static void loadLuceneMeta(RequestContext context, List<IFeedRecords.FieldMeta> fields)
            throws CatalogIndexException {
        LuceneIndexAdapter indexAdapter = new LuceneIndexAdapter(context);
        IndexSearcher searcher = null;
        try {
            searcher = indexAdapter.newSearcher();
            IndexReader indexReader = searcher.getIndexReader();
            for (String fieldName : indexReader.getFieldNames(IndexReader.FieldOption.ALL)) {
                fields.add(new IFeedRecords.FieldMeta(IFeedRecord.STD_COLLECTION_INDEX + "." + fieldName,
                        "esriFieldTypeString", fieldName));
            }
        } catch (Exception e) {
            String sMsg = "Error accessing index:\n " + Val.chkStr(e.getMessage());
            throw new CatalogIndexException(sMsg, e);
        } finally {
            indexAdapter.closeSearcher(searcher);
        }
    }

}