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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.vfs.impl;

import org.tinygroup.vfs.FileObject;
import org.tinygroup.vfs.SchemaProvider;
import org.tinygroup.vfs.VFSRuntimeException;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

/**
 * 功能说明:URL资源
 * 
 * 
 * 开发人员: renhui 

 * 开发时间: 2013-8-29 

 * 

 */
public abstract class URLFileObject extends AbstractFileObject {
    private URL url;
    protected String path;
    protected String fileName;
    private String extName;
    private long fileSize;
    private List children;

    public URL getUrl() {
        return url;
    }

    public void setUrl(URL url) {
        this.url = url;
    }

    public void setExtName(String extName) {
        this.extName = extName;
    }

    public long getFileSize() {
        return fileSize;
    }

    public void setFileSize(long fileSize) {
        this.fileSize = fileSize;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public URLFileObject(SchemaProvider schemaProvider) {
        super(schemaProvider);
    }

    public URLFileObject(SchemaProvider schemaProvider, String resource) {
        super(schemaProvider);
        try {
            url = new URL(resource);
        } catch (MalformedURLException e) {
            throw new RuntimeException("不能定位到资源:" + resource, e);
        }
    }

    public String getAbsolutePath() {
        return url.getPath();
    }

    public String getPath() {
        if (path == null) {
            if (getParent() == null) {
                path = "";
            } else {
                path = getParent().getPath() + "/" + getFileName();
            }
        }
        return path;
    }

    public String getFileName() {
        if (fileName == null) {
            String absolutePath = getAbsolutePath();
            int lastIndex = absolutePath.lastIndexOf('/');
            if (lastIndex != -1) {
                fileName = absolutePath.substring(lastIndex + 1);
            } else {
                fileName = "";
            }
        }
        return fileName;
    }

    public String getExtName() {
        if (extName == null) {
            String name = getFileName();
            int lastIndex = name.lastIndexOf('.');
            if (lastIndex != -1) {
                extName = name.substring(lastIndex + 1);
            } else {
                extName = "";
            }
        }
        return extName;
    }

    public boolean isFolder() {
        return false;
    }

    public boolean isExist() {
        return true;
    }

    public InputStream getInputStream() {
        InputStream stream = null;
        try {
            stream = url.openStream();
        } catch (IOException e) {
            throw new VFSRuntimeException(e);
        }
        return stream;
    }

    public OutputStream getOutputStream() {
        try {
            URLConnection connection = url.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            return connection.getOutputStream();
        } catch (IOException e) {
            throw new VFSRuntimeException(e);
        }
    }

    public FileObject getChild(String fileName) {
        List child = getChildren();
        if (child == null || child.size() == 0) {
            return null;
        }
        for (FileObject fileObject : getChildren()) {
            if (fileObject.getFileName().equals(fileName)) {
                return fileObject;
            }
        }
        return null;
    }

    public List getChildren() {
        if (children == null) {
            children = new ArrayList();
        }
        return children;
    }

    public boolean isInPackage() {
        return false;
    }

    public URL getURL() {
        return url;
    }

}