scan Package Names By File - Java Reflection

Java examples for Reflection:package

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Description

scan Package Names By File

Demo Code

/*//from   w w w  .j av a 2s . c  om
 * Copyright Bruce Liang (ldcsaa@gmail.com)
 *
 * Version   : JessMA 3.5.1
 * Author   : Bruce Liang
 * Website   : http://www.jessma.org
 * Project   : http://www.oschina.net/p/portal-basic
 * Blog      : http://www.cnblogs.com/ldcsaa
 * WeiBo   : http://weibo.com/u/1402935851
 * QQ Group   : 75375912
 *
 * 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.
 */
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Pattern;

public class Main{
    private static final char PACKAGE_SEP_CHAR = '.';
    private static final char PATH_SEP_CHAR = '/';
    private static final String PATH_SEP_STR = "/";
    
    public static final void scanPackageNamesByFile(String filePath,
            int packageStartIndex, Set<String> names) {
        scanPackageNamesByFile(filePath, packageStartIndex, null, names);
    }
    
    public static final void scanPackageNamesByFile(String filePath,
            int packageStartIndex, PackageFilter filter, Set<String> names) {
        if (filePath.endsWith(PATH_SEP_STR))
            filePath = filePath.substring(0, filePath.length() - 1);
        if (packageStartIndex > filePath.length())
            packageStartIndex = filePath.length();

        final String basePackagePath = filePath
                .substring(packageStartIndex);

        File dir = new File(filePath);
        File[] files = dir.listFiles(new FileFilter() {
            @Override
            public boolean accept(File file) {
                if (file.isDirectory())
                    return true;

                return false;
            }
        });

        for (File file : files) {
            String name = file.getName();
            String packageName = name;

            if (basePackagePath.length() != 0)
                packageName = basePackagePath + PATH_SEP_CHAR + packageName;
            if (packageName.startsWith(PATH_SEP_STR))
                packageName = packageName
                        .substring(1, packageName.length());

            packageName = packageName.replace(PATH_SEP_CHAR,
                    PACKAGE_SEP_CHAR);

            if (filter == null || filter.accept(packageName))
                names.add(packageName);

            String subPath = filePath + PATH_SEP_CHAR + name;

            scanPackageNamesByFile(subPath, packageStartIndex, filter,
                    names);
        }
    }
}

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