source: trunk/CrossPare/src/de/ugoe/cs/cpdp/loader/AbstractFolderLoader.java @ 4

package de.ugoe.cs.cpdp.loader;

import java.io.File;
import java.util.LinkedList;
import java.util.List;

import weka.core.Instances;

import de.ugoe.cs.cpdp.versions.SoftwareVersion;

/**
 * Abstract class for loading data from a folder. The subfolders of a defined
 * folder define the projects, the file contained in the subfolder are the
 * versions of a project.
 * 
 * @author Steffen Herbold
 */
public abstract class AbstractFolderLoader implements IVersionLoader {

        /**
         * Path of the data.
         */
        private String path = "";

        /**
         * @see de.ugoe.cs.cpdp.loader.IVersionLoader#setLocation(java.lang.String)
         */
        @Override
        public void setLocation(String location) {
                path = location;
        }

        /**
         * @see de.ugoe.cs.cpdp.loader.IVersionLoader#load()
         */
        @Override
        public List<SoftwareVersion> load() {
                final List<SoftwareVersion> versions = new LinkedList<SoftwareVersion>();

                final File dataDir = new File(path);
                final SingleVersionLoader instancesLoader = getSingleLoader();

                for (File projectDir : dataDir.listFiles()) {
                        if (projectDir.isDirectory()) {
                                String projectName = projectDir.getName();
                                for (File versionFile : projectDir.listFiles()) {
                                        if (versionFile.isFile()
                                                        && instancesLoader.filenameFilter(versionFile
                                                                        .getName())) {
                                                String versionName = versionFile.getName();
                                                Instances data = instancesLoader.load(versionFile);
                                                versions.add(new SoftwareVersion(projectName,
                                                                versionName, data));
                                        }
                                }
                        }
                }
                return versions;
        }

        /**
         * Returns the concrete {@link SingleVersionLoader} to be used with this
         * folder loader.
         * 
         * @return
         */
        abstract protected SingleVersionLoader getSingleLoader();
}