com.github.wolfdogs.kemono.util.resource.zip.ZipDirResource.java Source code

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Here is the source code for com.github.wolfdogs.kemono.util.resource.zip.ZipDirResource.java

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/**
 * Copyright (C) 2012 MK124
 *
 * 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 com.github.wolfdogs.kemono.util.resource.zip;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipFile;
import org.apache.commons.lang3.StringUtils;

import com.github.wolfdogs.kemono.util.collection.FilteredMap;
import com.github.wolfdogs.kemono.util.resource.AbstractDirResource;
import com.github.wolfdogs.kemono.util.resource.DirResource;
import com.github.wolfdogs.kemono.util.resource.Resource;
import com.github.wolfdogs.kemono.util.resource.ResourceManager;

/**
 * ??ZipDirResource
 * 
 * @author MK124
 */
public class ZipDirResource extends AbstractDirResource implements DirResource {
    static {
        ResourceManager.addType("ZIP", ZipDirResource.class);
    }

    private DirResource parent;
    private ZipFile zipFile;
    private ZipArchiveEntry entry;

    private Map<String, Resource> childs;

    public ZipDirResource(File file) throws IOException {
        this.zipFile = new ZipFile(file);

        initialize();

        Enumeration<ZipArchiveEntry> entries = zipFile.getEntries();
        while (entries.hasMoreElements()) {
            ZipArchiveEntry zipArchiveEntry = entries.nextElement();
            String entryPath = zipArchiveEntry.getName();

            createResource(entryPath, zipArchiveEntry);
        }
    }

    private ZipDirResource(ZipDirResource parent, ZipFile zipFile) {
        this.parent = parent;
        this.zipFile = zipFile;

        initialize();
    }

    private void initialize() {
        childs = FilteredMap.lowercasedKeyMap(new HashMap<String, Resource>());
    }

    private void setEntry(ZipArchiveEntry entry) {
        this.entry = entry;
    }

    private void createResource(String path, ZipArchiveEntry entry) {
        String[] childs = StringUtils.split(path, "/\\");

        ZipDirResource res = this;
        for (int i = 0; i < childs.length - 1; i++) {
            String name = childs[i];

            ZipDirResource child = (ZipDirResource) res.getDir(name);
            if (child == null)
                child = new ZipDirResource(res, zipFile);

            res.addResource(name, child);
            res = child;
        }

        if (entry.isDirectory()) {
            ZipDirResource child = new ZipDirResource(res, zipFile);
            child.setEntry(entry);
            res.addResource(childs[childs.length - 1], child);
        } else {
            ZipFileResource child = new ZipFileResource(res, zipFile, entry);
            res.addResource(childs[childs.length - 1], child);
        }
    }

    private void addResource(String name, Resource resource) {
        childs.put(name.toLowerCase(), resource);
    }

    private Resource getChild(String path) {
        return childs.get(path.toLowerCase());
    }

    @Override
    public String getPath() {
        return entry.getName();
    }

    @Override
    public DirResource getParent() {
        return parent;
    }

    @Override
    public Resource get(String path) {
        String[] childs = StringUtils.split(path, "/\\", 2);
        if (childs.length == 0)
            return this;

        Resource res = getChild(childs[0]);

        if (childs.length == 1)
            return res;
        if (childs.length == 2 && res instanceof DirResource) {
            DirResource dirRes = (DirResource) res;
            return dirRes.get(childs[1]);
        }

        return null;
    }

    @Override
    public Collection<Resource> list() {
        return childs.values();
    }
}