PathSerializer.java

package org.erlide.engine.model.root;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;

import com.google.common.collect.Lists;

public final class PathSerializer {

    private static final List<IPath> EMPTY_LIST = Lists.newArrayList();
    public static final String SEP = ";";

    public static String packList(final Iterable<IPath> list) {
        final StringBuilder result = new StringBuilder();
        for (final IPath s : list) {
            result.append(s.toPortableString()).append(SEP);
        }
        return result.toString();
    }

    public static Collection<IPath> unpackList(final String string) {
        return unpackList(string, SEP);
    }

    public static String packArray(final IPath[] strs) {
        final StringBuilder result = new StringBuilder();
        for (final IPath s : strs) {
            result.append(s.toPortableString()).append(SEP);
        }
        return result.toString();
    }

    public static IPath[] unpackArray(final String str) {
        return unpackList(str).toArray(new IPath[0]);
    }

    public static List<String> readFile(final String file) {
        final List<String> res = new ArrayList<>();
        try (final BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String line;
            while ((line = reader.readLine()) != null) {
                res.add(line);
            }
        } catch (final IOException e) {
        }
        return res;
    }

    private PathSerializer() {
    }

    public static List<IPath> unpackList(final String string, final String sep) {
        if (string.length() == 0) {
            return EMPTY_LIST;
        }
        final String[] v = string.split(sep);
        final List<String> sresult = new ArrayList<>(Arrays.asList(v));
        final List<IPath> result = new ArrayList<>();
        for (final String s : sresult) {
            final Path path = new Path(s.trim());
            if (!path.isEmpty()) {
                result.add(path);
            }
        }
        return result;
    }

}