Application: gvSIG desktop » Library: org.gvsig.tools

package org.gvsig.tools.resourcesstorage;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.URL;

import org.apache.commons.io.IOUtils;

/**

 *

 * @author jjdelcerro

 */

@SuppressWarnings("UseSpecificCatch")

public class URLResource implements ResourcesStorage.Resource {

    private final URL url;

    private InputStream is;

    public URLResource(URL url) {

        this.url = url;

        this.is = null;

    }

    @Override

    public boolean isReadOnly() {

        return true;

    }

    @Override

    public URL getURL() {

        return this.url;

    }

    @Override

    public boolean exists() {

        if( this.is!=null ) {

            return true;

        }

        try {

            this.is = this.url.openStream();

            return true;

        } catch (Exception ex) {

            return false;

        }

    }

    @Override

    public InputStream asInputStream() throws IOException {

        if( this.is!=null ) {

            throw new RuntimeException("Stream already open");

        }

        this.is = this.url.openStream();

        return this.is;

    }

    @Override

    public OutputStream asOutputStream() throws IOException {

        return null;

    }

    @Override

    public void close() {

        IOUtils.closeQuietly(this.is);

        this.is = null;

    }

}