ManageIndicesAction.java

/*
 * mongobrowser - a webstart gui application for viewing, 
 *                editing and administering a Mongo Database
 * Copyright 2009-2011 MeBigFatGuy.com
 * Copyright 2009-2011 Dave Brosius
 * 
 * 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.mebigfatguy.mongobrowser.actions;

import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.swing.AbstractAction;
import javax.swing.JTree;

import com.mebigfatguy.mongobrowser.MongoBundle;
import com.mebigfatguy.mongobrowser.MongoConstants;
import com.mebigfatguy.mongobrowser.MongoContext;
import com.mebigfatguy.mongobrowser.dialogs.ManageIndicesDialog;
import com.mebigfatguy.mongobrowser.dialogs.MongoTreeNode;
import com.mebigfatguy.mongobrowser.model.IndexDescription;
import com.mebigfatguy.mongobrowser.model.IndexField;
import com.mebigfatguy.mongobrowser.model.IndexFieldList;
import com.mongodb.BasicDBObject;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;

public class ManageIndicesAction extends AbstractAction {

	private static final long serialVersionUID = 554299884297317739L;
	private final MongoContext context;

	public ManageIndicesAction(MongoContext ctxt) {
		super(MongoBundle.getString(MongoBundle.Key.ManageIndices));
		context = ctxt;
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		JTree tree = context.getTree();

		MongoTreeNode[] nodes = context.getSelectedNodes();
		DBCollection collection = (DBCollection) nodes[0].getUserObject();
		List<IndexDescription> indices = buildIndexDescriptions(collection);

		ManageIndicesDialog dialog = new ManageIndicesDialog(indices);
		dialog.setLocationRelativeTo(tree);
		dialog.setModal(true);
		dialog.setVisible(true);

		if (dialog.isOK()) {
			indices = dialog.getIndicesNames();
			updateIndices(collection, indices);
		}
	}

	private List<IndexDescription> buildIndexDescriptions(DBCollection collection) {
		List<IndexDescription> indices = new ArrayList<IndexDescription>();
		List<DBObject> dbIndices = collection.getIndexInfo();
		for (DBObject dbIndex : dbIndices) {
			String name = (String) dbIndex.get(MongoConstants.NAME);
			Map<String, Integer> srcFields = (Map<String, Integer>) dbIndex.get(MongoConstants.KEY);
			IndexFieldList fieldSet = new IndexFieldList();

			for (Map.Entry<String, Integer> entry : srcFields.entrySet()) {
				fieldSet.add(entry.getKey(), MongoConstants.ASCENDING.equals(entry.getValue()));
			}

			indices.add(new IndexDescription(name, fieldSet));
		}

		return indices;
	}

	private void updateIndices(DBCollection collection, List<IndexDescription> indices) {

		collection.dropIndexes();

		for (IndexDescription index : indices) {
			if (!MongoConstants.ID_INDEX.equals(index.getIndexName())) {

				BasicDBObject dbFields = new BasicDBObject();
				IndexFieldList fieldList = index.getIndexFieldList();

				for (IndexField field : fieldList) {
					dbFields.append(field.getFieldName(), Integer.valueOf(field.isAscending() ? 1 : -1));
				}

				collection.ensureIndex(dbFields, index.getIndexName());
			}
		}
	}
}