/**
* Returns JAR archive structure.
*
* @param jarClass any class within the JAR
* @param allowedExtensions list of extension filters
* @param allowedPackgages list of allowed packages
* @param listener jar download listener
* @return JAR archive structure
*/
public static JarStructure getJarStructure(
final Class jarClass,
final List<String> allowedExtensions,
final List<String> allowedPackgages,
final FileDownloadListener listener) {
try {
final CodeSource src = jarClass.getProtectionDomain().getCodeSource();
if (src != null) {
// Creating structure
// Source url
final URL jarUrl = src.getLocation();
final URI uri = jarUrl.toURI();
// Source file
final File jarFile;
final String scheme = uri.getScheme();
if (scheme != null && scheme.equalsIgnoreCase("file")) {
// Local jar-file
jarFile = new File(uri);
} else {
// Remote jar-file
jarFile =
FileUtils.downloadFile(
jarUrl.toString(), File.createTempFile("jar_file", ".tmp"), listener);
}
// Creating
final JarEntry jarEntry = new JarEntry(JarEntryType.jarEntry, jarFile.getName());
final JarStructure jarStructure = new JarStructure(jarEntry);
jarStructure.setJarLocation(jarFile.getAbsolutePath());
// Reading all entries and parsing them into structure
final ZipInputStream zip = new ZipInputStream(jarUrl.openStream());
ZipEntry zipEntry;
while ((zipEntry = zip.getNextEntry()) != null) {
final String entryName = zipEntry.getName();
if (isAllowedPackage(entryName, allowedPackgages)
&& (zipEntry.isDirectory() || isAllowedExtension(entryName, allowedExtensions))) {
parseElement(jarEntry, entryName, zipEntry);
}
}
zip.close();
return jarStructure;
}
} catch (final IOException e) {
FlatLafLogger.error(ReflectUtils.class, e);
} catch (final URISyntaxException e) {
FlatLafLogger.error(ReflectUtils.class, e);
}
return null;
}
/**
* Returns specified class field's type. This method will also look for the field in super-classes
* if any exist.
*
* @param classType type of the class where field can be located
* @param fieldName field name
* @return specified class field's type
*/
public static Class<?> getFieldTypeSafely(final Class classType, final String fieldName) {
try {
return getFieldType(classType, fieldName);
} catch (final NoSuchFieldException e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: getFieldTypeSafely", e);
}
return null;
}
}
/**
* Returns newly created class instance.
*
* @param theClass class to process
* @param arguments class constructor arguments
* @return newly created class instance
*/
public static <T> T createInstanceSafely(final Class theClass, final Object... arguments) {
try {
return createInstance(theClass, arguments);
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: createInstanceSafely", e);
}
return null;
}
}
/**
* Returns class for the specified canonical name.
*
* @param canonicalName class canonical name
* @return class for the specified canonical name
*/
public static Class getClassSafely(final String canonicalName) {
try {
return Class.forName(canonicalName);
} catch (final ClassNotFoundException e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: getClassSafely", e);
}
return null;
}
}
/**
* Returns static field value from the specified class.
*
* @param classType class type
* @param fieldName class field name
* @return static field value from the specified class
*/
public static <T> T getStaticFieldValueSafely(final Class classType, final String fieldName) {
try {
return getStaticFieldValue(classType, fieldName);
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: getStaticFieldValueSafely", e);
}
return null;
}
}
/**
* Returns object field value. This method allows to access even private object fields.
*
* @param object object instance
* @param field object field
* @param <T> field value type
* @return object field value
*/
public static <T> T getFieldValueSafely(final Object object, final String field) {
try {
return getFieldValue(object, field);
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: getFieldValueSafely", e);
}
return null;
}
}
/**
* Returns result given by called method.
*
* @param object object instance
* @param methodName method name
* @param arguments method arguments
* @return result given by called method
*/
public static <T> T callMethodSafely(
final Object object, final String methodName, final Object... arguments) {
try {
return callMethod(object, methodName, arguments);
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: callMethodSafely", e);
}
return null;
}
}
/**
* Returns object's method with the specified name and arguments. If method is not found in the
* object class all superclasses will be searched for that method.
*
* @param aClass object class
* @param methodName method name
* @param arguments method arguments
* @return object's method with the specified name and arguments
*/
public static Method getMethodSafely(
final Class aClass, final String methodName, final Object... arguments) {
try {
return getMethod(aClass, methodName, arguments);
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: getMethodSafely", e);
}
return null;
}
}
/**
* Applies specified value to object field. This method allows to access and modify even private
* object fields.
*
* @param object object instance
* @param field object field
* @param value field value
* @return true if value was applied successfully, false otherwise
*/
public static boolean setFieldValueSafely(
final Object object, final String field, final Object value) {
try {
setFieldValue(object, field, value);
return true;
} catch (final Throwable e) {
if (safeMethodsLoggingEnabled) {
FlatLafLogger.warn("ReflectionUtils method failed: setFieldValueSafely", e);
}
return false;
}
}
/**
* Returns JAR location File for the specified class.
*
* @param jarClass any class from that JAR
* @return JAR location File
*/
public static File getJarLocationFile(final Class jarClass) {
try {
final CodeSource src = jarClass.getProtectionDomain().getCodeSource();
if (src != null) {
final URL jarUrl = src.getLocation();
final URI uri = jarUrl.toURI();
final String scheme = uri.getScheme();
if (scheme != null && scheme.equalsIgnoreCase("file")) {
return new File(uri);
}
}
} catch (final URISyntaxException e) {
FlatLafLogger.error(ReflectUtils.class, e);
}
return null;
}
