#vulnerable code 
                                public File parse(File outputDirectory, String[] classPath, Class cls) throws IOException, Exception {
        Loader.ClassProperties allProperties = Loader.loadProperties(cls, properties, true);
        Loader.ClassProperties clsProperties = Loader.loadProperties(cls, properties, false);
        LinkedList<File> allFiles = allProperties.getHeaderFiles();
        LinkedList<File> clsFiles = clsProperties.getHeaderFiles();
        LinkedList<String> allTargets = allProperties.get("target");
        LinkedList<String> clsTargets = clsProperties.get("target");
        LinkedList<String> clsHelpers = clsProperties.get("helper");
        String target = clsTargets.getFirst(); // there can only be one
        LinkedList<Class> allInherited = allProperties.getInheritedClasses();

        infoMap = new Parser.InfoMap();
        for (Class c : allInherited) {
            try {
                ((InfoMapper)c.newInstance()).map(infoMap);
            } catch (ClassCastException e) {
            } catch (InstantiationException e) {
            } catch (IllegalAccessException e) {
                // fail silently as if the interface wasn't implemented
            }
        }
        leafInfoMap = new Parser.InfoMap();
        try {
            ((InfoMapper)cls.newInstance()).map(leafInfoMap);
        } catch (ClassCastException e) {
        } catch (InstantiationException e) {
        } catch (IllegalAccessException e) {
            // fail silently as if the interface wasn't implemented
        }
        infoMap.putAll(leafInfoMap);

        String version = Generator.class.getPackage().getImplementationVersion();
        if (version == null) {
            version = "unknown";
        }
        String text = "// Targeted by JavaCPP version " + version + "\n\n";
        int n = target.lastIndexOf('.');
        if (n >= 0) {
            text += "package " + target.substring(0, n) + ";\n\n";
        }
        LinkedList<Info> infoList = leafInfoMap.get(null);
        for (Info info : infoList) {
            if (info.javaText != null && info.javaText.startsWith("import")) {
                text += info.javaText + "\n";
            }
        }
        text += "import com.googlecode.javacpp.*;\n" +
                "import com.googlecode.javacpp.annotation.*;\n" +
                "import java.nio.*;\n\n";
        for (String s : allTargets) {
            if (!target.equals(s)) {
                text += "import static " + s + ".*;\n";
            }
        }
        if (allTargets.size() > 1) {
            text += "\n";
        }
        text += "public class " + target.substring(n + 1) + " extends "
             + (clsHelpers.size() > 0 ? clsHelpers.getFirst() : cls.getCanonicalName()) + " {";
        leafInfoMap.putFirst(new Info().javaText(text));

        String targetPath = target.replace('.', File.separatorChar);
        File targetFile = new File(outputDirectory, targetPath + ".java");
        logger.info("Targeting " + targetFile);
        Context context = new Context();
        String[] includePath = classPath;
        n = targetPath.lastIndexOf(File.separatorChar);
        if (n >= 0) {
            includePath = classPath.clone();
            for (int i = 0; i < includePath.length; i++) {
                includePath[i] += File.separator + targetPath.substring(0, n);
            }
        }
        for (File f : allFiles) {
            if (!clsFiles.contains(f)) {
                parse(null, context, includePath, f);
            }
        }
        parse(targetFile, context, includePath, clsFiles.toArray(new File[clsFiles.size()]));
        return targetFile;
    } 
                            #location 13 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public File parse(File outputDirectory, String[] classPath, Class cls) throws IOException, Exception {
        Loader.ClassProperties allProperties = Loader.loadProperties(cls, properties, true);
        Loader.ClassProperties clsProperties = Loader.loadProperties(cls, properties, false);
        LinkedList<String> clsIncludes = new LinkedList<String>();
        clsIncludes.addAll(clsProperties.get("platform.include"));
        clsIncludes.addAll(clsProperties.get("platform.cinclude"));
        LinkedList<String> allIncludes = new LinkedList<String>();
        allIncludes.addAll(allProperties.get("platform.include"));
        allIncludes.addAll(allProperties.get("platform.cinclude"));
        LinkedList<File> allFiles = findHeaderFiles(allProperties, allIncludes);
        LinkedList<File> clsFiles = findHeaderFiles(allProperties, clsIncludes);
        LinkedList<String> allTargets = allProperties.get("target");
        LinkedList<String> clsTargets = clsProperties.get("target");
        LinkedList<String> clsHelpers = clsProperties.get("helper");
        String target = clsTargets.getFirst(); // there can only be one
        LinkedList<Class> allInherited = allProperties.getInheritedClasses();

        infoMap = new Parser.InfoMap();
        for (Class c : allInherited) {
            try {
                ((InfoMapper)c.newInstance()).map(infoMap);
            } catch (ClassCastException e) {
            } catch (InstantiationException e) {
            } catch (IllegalAccessException e) {
                // fail silently as if the interface wasn't implemented
            }
        }
        leafInfoMap = new Parser.InfoMap();
        try {
            ((InfoMapper)cls.newInstance()).map(leafInfoMap);
        } catch (ClassCastException e) {
        } catch (InstantiationException e) {
        } catch (IllegalAccessException e) {
            // fail silently as if the interface wasn't implemented
        }
        infoMap.putAll(leafInfoMap);

        String version = Generator.class.getPackage().getImplementationVersion();
        if (version == null) {
            version = "unknown";
        }
        String text = "// Targeted by JavaCPP version " + version + "\n\n";
        int n = target.lastIndexOf('.');
        if (n >= 0) {
            text += "package " + target.substring(0, n) + ";\n\n";
        }
        LinkedList<Info> infoList = leafInfoMap.get(null);
        for (Info info : infoList) {
            if (info.javaText != null && info.javaText.startsWith("import")) {
                text += info.javaText + "\n";
            }
        }
        text += "import com.googlecode.javacpp.*;\n" +
                "import com.googlecode.javacpp.annotation.*;\n" +
                "import java.nio.*;\n\n";
        for (String s : allTargets) {
            if (!target.equals(s)) {
                text += "import static " + s + ".*;\n";
            }
        }
        if (allTargets.size() > 1) {
            text += "\n";
        }
        text += "public class " + target.substring(n + 1) + " extends "
             + (clsHelpers.size() > 0 ? clsHelpers.getFirst() : cls.getCanonicalName()) + " {";
        leafInfoMap.putFirst(new Info().javaText(text));

        String targetPath = target.replace('.', File.separatorChar);
        File targetFile = new File(outputDirectory, targetPath + ".java");
        logger.info("Targeting " + targetFile);
        Context context = new Context();
        String[] includePath = classPath;
        n = targetPath.lastIndexOf(File.separatorChar);
        if (n >= 0) {
            includePath = classPath.clone();
            for (int i = 0; i < includePath.length; i++) {
                includePath[i] += File.separator + targetPath.substring(0, n);
            }
        }
        for (File f : allFiles) {
            if (!clsFiles.contains(f)) {
                parse(null, context, includePath, f);
            }
        }
        parse(targetFile, context, includePath, clsFiles.toArray(new File[clsFiles.size()]));
        return targetFile;
    }