package org.simantics.district.network.techtype.requests;

import java.util.Map;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.procedure.adapter.TransientCacheListener;
import org.simantics.db.common.request.BinaryRead;
import org.simantics.db.exception.DatabaseException;

/**
 * Query for a possible tech type table item in a table with a given item key.
 * 
 * Results in null, if no such item was found.
 */
public class PossibleTechTypeItem extends BinaryRead<Resource, String, Map<String, String>> {

	public PossibleTechTypeItem(Resource table, String itemCode) {
		super(table, itemCode);
	}
	
	@Override
	public Map<String, String> perform(ReadGraph graph) throws DatabaseException {
		Resource table = this.parameter;
		String itemCode = this.parameter2;
		
		Map<String, Map<String, String>> map = graph.syncRequest(new TechTypeTableData(table), TransientCacheListener.instance());
		return map.get(itemCode);
	}
}