org.springframework.boot.devtools.classpath.ClassPathFolders.java Source code

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Here is the source code for org.springframework.boot.devtools.classpath.ClassPathFolders.java

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * 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 org.springframework.boot.devtools.classpath;

import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.util.ResourceUtils;

/**
 * Provides access to entries on the classpath that refer to folders.
 *
 * @author Phillip Webb
 * @since 1.3.0
 */
public class ClassPathFolders implements Iterable<File> {

    private static final Log logger = LogFactory.getLog(ClassPathFolders.class);

    private final List<File> folders = new ArrayList<File>();

    public ClassPathFolders(URL[] urls) {
        if (urls != null) {
            addUrls(urls);
        }
    }

    private void addUrls(URL[] urls) {
        for (URL url : urls) {
            addUrl(url);
        }
    }

    private void addUrl(URL url) {
        if (url.getProtocol().equals("file") && url.getPath().endsWith("/")) {
            try {
                this.folders.add(ResourceUtils.getFile(url));
            } catch (Exception ex) {
                logger.warn("Unable to get classpath URL " + url);
                logger.trace("Unable to get classpath URL " + url, ex);
            }
        }
    }

    @Override
    public Iterator<File> iterator() {
        return Collections.unmodifiableList(this.folders).iterator();
    }

}