org.drools.compiler.SourcePackageProvider Maven / Gradle / Ivy

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package org.drools.compiler;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import org.drools.RuntimeDroolsException;
import org.drools.agent.FileLoader;
import org.drools.rule.Package;

/**
 * This is used by the agent when a source file is encountered.
 * 
 * @author michaelneale
 * 
 */
public class SourcePackageProvider implements FileLoader {

	public Package loadPackage(File drl) throws IOException {
		FileInputStream fin = new FileInputStream(drl);

		PackageBuilder b = new PackageBuilder();
		try {
			b.addPackageFromDrl(new InputStreamReader(fin));

			fin.close();

			if (b.hasErrors()) {
				throw new RuntimeDroolsException(
						"Error building rules from source: " + b.getErrors());
			} else {
				return b.getPackage();
			}
		} catch (DroolsParserException e) {
			throw new RuntimeException(e);
		}

	}

}