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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
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/*
 * Copyright 2002-2018 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
 *
 *      https://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.feilong.lib.springframework.core.io;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;

import com.feilong.lib.springframework.core.NestedIOException;
import com.feilong.lib.springframework.util.Assert;

/**
 * JBoss VFS based {@link Resource} implementation.
 *
 * 
 * As of Spring 4.0, this class supports VFS 3.x on JBoss AS 6+
 * (package {@code org.jboss.vfs}) and is in particular compatible with
 * JBoss AS 7 and WildFly 8+.
 *
 * @author Ales Justin
 * @author Juergen Hoeller
 * @author Costin Leau
 * @author Sam Brannen
 * @since 3.0
 * @see org.jboss.vfs.VirtualFile
 */
public class VfsResource extends AbstractResource{

    private final Object resource;

    /**
     * Create a new {@code VfsResource} wrapping the given resource handle.
     * 
     * @param resource
     *            a {@code org.jboss.vfs.VirtualFile} instance
     *            (untyped in order to avoid a static dependency on the VFS API)
     */
    public VfsResource(Object resource){
        Assert.notNull(resource, "VirtualFile must not be null");
        this.resource = resource;
    }

    @Override
    public InputStream getInputStream() throws IOException{
        return VfsUtils.getInputStream(this.resource);
    }

    @Override
    public boolean exists(){
        return VfsUtils.exists(this.resource);
    }

    @Override
    public boolean isReadable(){
        return VfsUtils.isReadable(this.resource);
    }

    @Override
    public URL getURL() throws IOException{
        try{
            return VfsUtils.getURL(this.resource);
        }catch (Exception ex){
            throw new NestedIOException("Failed to obtain URL for file " + this.resource, ex);
        }
    }

    @Override
    public URI getURI() throws IOException{
        try{
            return VfsUtils.getURI(this.resource);
        }catch (Exception ex){
            throw new NestedIOException("Failed to obtain URI for " + this.resource, ex);
        }
    }

    @Override
    public File getFile() throws IOException{
        return VfsUtils.getFile(this.resource);
    }

    @Override
    public long contentLength() throws IOException{
        return VfsUtils.getSize(this.resource);
    }

    @Override
    public long lastModified() throws IOException{
        return VfsUtils.getLastModified(this.resource);
    }

    @Override
    public Resource createRelative(String relativePath) throws IOException{
        if (!relativePath.startsWith(".") && relativePath.contains("/")){
            try{
                return new VfsResource(VfsUtils.getChild(this.resource, relativePath));
            }catch (IOException ex){
                // fall back to getRelative
            }
        }

        return new VfsResource(VfsUtils.getRelative(new URL(getURL(), relativePath)));
    }

    @Override
    public String getFilename(){
        return VfsUtils.getName(this.resource);
    }

    @Override
    public String getDescription(){
        return "VFS resource [" + this.resource + "]";
    }

    @Override
    public boolean equals(Object obj){
        return (obj == this || (obj instanceof VfsResource && this.resource.equals(((VfsResource) obj).resource)));
    }

    @Override
    public int hashCode(){
        return this.resource.hashCode();
    }

}