AbstractLiveFileBuilder.java

/**
 * Copyright (C) 2015 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.bonitasoft.web.designer.livebuild;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

import static java.nio.file.FileVisitResult.CONTINUE;
import static java.nio.file.Files.walkFileTree;

public abstract class AbstractLiveFileBuilder {

    private final Watcher watcher;

    public AbstractLiveFileBuilder(Watcher watcher) {
        this.watcher = watcher;
    }

    public void start(final Path root) throws IOException {

        walkFileTree(root, new SimpleFileVisitor<Path>() {

            @Override
            public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
                buildIfNeeded(path);
                return CONTINUE;
            }
        });

        // now on build on change
        watcher.watch(root, path -> buildIfNeeded(path));
    }

    private void buildIfNeeded(Path path) throws IOException {
        if (isBuildable(path.toFile().getPath())) {
            build(path);
        }
    }

    public abstract void build(Path path) throws IOException;

    public abstract boolean isBuildable(String path);
}