package com.tinkerpop.rexster.config;
import com.tinkerpop.blueprints.Graph;
import com.tinkerpop.blueprints.KeyIndexableGraph;
import com.tinkerpop.blueprints.util.wrappers.id.IdGraph;
import com.tinkerpop.rexster.RexsterApplicationGraph;
import com.tinkerpop.rexster.Tokens;
import org.apache.commons.configuration.HierarchicalConfiguration;
import org.apache.commons.configuration.SubnodeConfiguration;
/**
* @author Joshua Shinavier (http://fortytwo.net)
*/
public class IdGraphConfiguration implements GraphConfiguration {
public Graph configureGraphInstance(final GraphConfigurationContext context) throws GraphConfigurationException {
final String graphFile = context.getProperties().getString(Tokens.REXSTER_GRAPH_LOCATION, null);
if (graphFile == null || graphFile.trim().length() == 0) {
throw new GraphConfigurationException("Check graph configuration. Missing or empty configuration element: " + Tokens.REXSTER_GRAPH_LOCATION);
}
RexsterApplicationGraph baseGraph = context.getGraphs().get(graphFile);
if (null == baseGraph) {
throw new GraphConfigurationException("no such base graph for IdGraph: " + graphFile);
}
if (!(baseGraph.getGraph() instanceof KeyIndexableGraph)) {
throw new GraphConfigurationException("base graph for IdGraph must be an instance of KeyIndexableGraph");
}
// get the <properties> section of the xml configuration
final HierarchicalConfiguration graphSectionConfig = (HierarchicalConfiguration) context.getProperties();
SubnodeConfiguration specificConfiguration;
try {
specificConfiguration = graphSectionConfig.configurationAt(Tokens.REXSTER_GRAPH_PROPERTIES);
} catch (IllegalArgumentException iae) {
throw new GraphConfigurationException("Check graph configuration. Missing or empty configuration element: " + Tokens.REXSTER_GRAPH_PROPERTIES);
}
boolean supportVertexIds = specificConfiguration.getBoolean("supportVertexIds", true);
boolean supportEdgeIds = specificConfiguration.getBoolean("supportEdgeIds", true);
return new IdGraph((KeyIndexableGraph) baseGraph.getGraph(), supportVertexIds, supportEdgeIds);
}
}