package org.simantics.graph.db;

import java.util.Set;

import org.simantics.db.exception.DatabaseException;

public class MissingDependencyException extends DatabaseException {

	private static final long serialVersionUID = -1579450497603555931L;
	
	private final Set<String> missingExternals;
	
	public MissingDependencyException(Set<String> missingExternals) {
		super(createMessage(missingExternals));
		this.missingExternals = missingExternals;
	}

	public MissingDependencyException(TransferableGraphImportProcess process) {
		this(process.missingExternals);
	}

	public MissingDependencyException(StreamingTransferableGraphImportProcess process) {
		this(process.missingExternals);
	}

	private static String createMessage(Set<String> missingExternals) {
		StringBuilder b = new StringBuilder();
		b.append("The following required items were missing from the database:\r\n");
		for(String missing : missingExternals) {
			b.append(" -" + missing + "\r\n");
		}
		return b.toString();
	}
	
	public Set<String> getMissingURIs() {
		return missingExternals;
	}
	
	@Override
	public String getShortExplanation() {
		return "Missing dependencies";
	}

}