org.apache.wink.server.internal.utils.ServletFileLoader Maven / Gradle / Ivy

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package org.apache.wink.server.internal.utils;

import java.io.FileNotFoundException;
import java.io.InputStream;

import javax.servlet.ServletContext;

import org.apache.wink.common.internal.utils.FileLoader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ServletFileLoader extends FileLoader {

    private static final Logger logger = LoggerFactory.getLogger(ServletFileLoader.class);

    public static InputStream loadFileAsStream(ServletContext servletContext, String fileName)
        throws FileNotFoundException {
        if (fileName == null || fileName.trim().equals("")) { //$NON-NLS-1$
            throw new NullPointerException("fileName"); //$NON-NLS-1$
        }

        if (servletContext != null) {
            logger.trace("Searching for {} using servlet context.", fileName); //$NON-NLS-1$

            if (fileName.startsWith("/")) {  // protect against MalformedURLException //$NON-NLS-1$
                InputStream is = servletContext.getResourceAsStream(fileName);
                if (is != null) {
                    return is;
                }
            }
        }

        return FileLoader.loadFileAsStream(fileName);
    }
}