Metacat

package edu.ucsb.nceas.metacat.index;

import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;

import org.apache.http.impl.client.DefaultHttpClient;

import org.dataone.cn.indexer.solrhttp.HTTPService;

import org.dataone.cn.indexer.solrhttp.SolrDoc;

import org.dataone.cn.indexer.solrhttp.SolrElementAdd;

import org.dataone.cn.indexer.solrhttp.SolrElementField;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

public class D1Index implements GenericIndex {

	protected final DefaultHttpClient client = new DefaultHttpClient();

	protected final HTTPService solrSvc =

			new HTTPService(new HttpComponentsClientHttpRequestFactory(this.client));

	protected String uri = "";

	D1Index(String uri) {

		this.uri = uri;

	}

	public void insert(String docID, Map<String, String[]> fields) throws IOException {

		this.update(docID, fields);

	}

	public void update(String docID, Map<String, String[]> fields) throws IOException {

		SolrDoc doc = new SolrDoc();

		// this works for our purposes, but violates DataONE expectations

		doc.addField(new SolrElementField(SolrElementField.FIELD_ID, docID));

		for (String k : fields.keySet()) {

			for (String v : fields.get(k)) {

				doc.addField(new SolrElementField(k, v));

			}

		}

		List<SolrDoc> docList = new ArrayList<SolrDoc>(1);

		docList.add(doc);

		solrSvc.sendUpdate(this.uri, new SolrElementAdd(docList));

	}

	public void remove(String docID) {

		solrSvc.sendSolrDelete(docID);

	}

	public String[] query(String q) throws IndexOutOfBoundsException {

		// the indexer's HttpService class doesn't provide general querying -- it's

		// an indexer only. Query handling is done by separate code in a different

		// part of the D1 architecture. That code is rather tightly bound to other

		// D1 elements and consequently challenging to integrate with Metacat.

		// For this and other reasons I feel that the other index interfaces are

		// a better choice for Metacat, so as yet this remains incomplete. It is

		// however possible to continue down this path.

		return new String[0];

	}

}