MavenHelper.java

/**
 *
 *     Copyright (C) norad.fr
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *             http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */
package fr.norad.visuwall.providers.hudson.helper;

import java.net.URL;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Preconditions;
import com.google.common.io.ByteStreams;

public class MavenHelper {

    private static final Logger LOG = LoggerFactory.getLogger(MavenHelper.class);

    private MavenHelper() {
    }

    public static boolean isMavenProject(String projectUrl) {
        checkProjectUrl(projectUrl);
        try {
            byte[] bytes = ByteStreams.toByteArray(new URL(projectUrl).openStream());
            String content = new String(bytes);
            return isMaven(content);
        } catch (Exception e) {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Can't define if " + projectUrl + " is a maven project, cause: " + e.getCause());
            }
            return true;
        }
    }

    public static boolean isNotMavenProject(String projectUrl) {
        checkProjectUrl(projectUrl);
        return !isMavenProject(projectUrl);
    }

    private static boolean isMaven(String content) {
        content = content.toLowerCase();
        return content.startsWith("<mavenmoduleset>");
    }

    private static void checkProjectUrl(String projectUrl) {
        Preconditions.checkNotNull(projectUrl, "projectUrl is mandatory");
    }

}