KarmaMetadataManager.java

package edu.isi.karma.metadata;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

import edu.isi.karma.controller.update.UpdateContainer;
import edu.isi.karma.rep.Workspace;
import edu.isi.karma.webserver.KarmaException;
import edu.isi.karma.webserver.ServletContextParameterMap;
import edu.isi.karma.webserver.ServletContextParameterMap.ContextParameter;

public class KarmaMetadataManager {

	private Map<KarmaMetadataType, KarmaMetadata> metadataTypes;
	public KarmaMetadataManager(ServletContextParameterMap contextParameters) throws KarmaException
	{
		createDirectoryForMetadata(contextParameters);
		metadataTypes = new HashMap<>();
		
	}
	private void createDirectoryForMetadata(ServletContextParameterMap contextParameters) throws KarmaException {
		String userDirPath = contextParameters.getParameterValue(ContextParameter.USER_DIRECTORY_PATH);
		
		File userDir = new File(userDirPath);
		if(userDir.exists() && !userDir.isDirectory())
		{
			throw new KarmaException("Directory provided for user preferences is actually a file!");
		}
		if(!userDir.exists() && !userDir.mkdirs())
		{
			throw new KarmaException("Unable to create directory for KARMA_WORK_HOME.  Please define the environment variable KARMA_WORK_HOME to save preferences and Karma's learning");
		}
	}
	public void register(KarmaMetadata metadata, UpdateContainer uc) throws KarmaException
	{
		metadataTypes.put(metadata.getType(), metadata);
	}
	
	public boolean isMetadataSupported(KarmaMetadataType type)
	{
		return metadataTypes.containsKey(type);
	}
	public void setup(Workspace workspace, UpdateContainer updateContainer) {
		// some meta data such as ModelLearner need preloaded-ontologies, we do this meta data first
		for(KarmaMetadata metadata : metadataTypes.values())
		{
			if (metadata instanceof OntologyMetadata)
				metadata.setup(updateContainer, workspace);
		}
		
		for(KarmaMetadata metadata : metadataTypes.values())
		{
			if (!(metadata instanceof OntologyMetadata))
				metadata.setup(updateContainer, workspace);
		}
		
	}

}