org.nosphere.honker.deptree.DepTreeFilesLoader.java Source code

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Here is the source code for org.nosphere.honker.deptree.DepTreeFilesLoader.java

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/*
 * Copyright (c) 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.nosphere.honker.deptree;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;

public final class DepTreeFilesLoader {
    private static final List<String> BASENAMES = Arrays.asList("license", "copyright", "copying", "copying.lesser",
            "notice");

    public List<DepTreeData.SomeFile> load(File artifactFile) {
        String fileExtension = FilenameUtils.getExtension(artifactFile.getName());
        if (fileExtension == null) {
            return new ArrayList<>();
        }
        switch (fileExtension.toLowerCase()) {
        case "zip":
        case "jar":
        case "war":
        case "ear":
            return loadFilesFromZip(artifactFile);
        default:
            return new ArrayList<>();
        }
    }

    private List<DepTreeData.SomeFile> loadFilesFromZip(File zipFile) {
        ZipFile zip = null;
        try {
            zip = new ZipFile(zipFile, ZipFile.OPEN_READ);
            List<DepTreeData.SomeFile> files = new ArrayList<>();
            Enumeration<? extends ZipEntry> entries = zip.entries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = entries.nextElement();
                String basename = StringUtils.substringAfterLast(entry.getName(), "/");
                String extension = FilenameUtils.getExtension(basename);
                if (!StringUtils.isEmpty(extension)) {
                    basename = FilenameUtils.removeExtension(basename);
                }
                basename = basename.toLowerCase();
                if (BASENAMES.contains(basename)) {
                    InputStream fileStream = zip.getInputStream(entry);
                    try {
                        String content = IOUtils.toString(fileStream, "UTF-8");
                        files.add(new DepTreeData.SomeFile(basename, entry.getName(), content));
                    } finally {
                        IOUtils.closeQuietly(fileStream);
                    }
                }
            }
            return files;
        } catch (IOException ex) {
            throw new RuntimeException(ex.getMessage(), ex);
        } finally {
            if (zip != null) {
                try {
                    zip.close();
                } catch (IOException ignored) {
                    // Ignored
                }
            }
        }
    }
}