Class JavaAdapter

java.lang.Object

org.mozilla.javascript.JavaAdapter

All Implemented Interfaces:

IdFunctionCall

public final class JavaAdapter
extends Object
implements IdFunctionCall

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	JavaAdapter.JavaAdapterSignature	Provides a key with which to distinguish previously generated adapter classes stored in a hash table.

Field Summary

Fields

Modifier and Type	Field	Description
private static final Object	FTAG
private static final int	Id_JavaAdapter

Constructor Summary

Constructors

Constructor	Description
JavaAdapter()

Method Summary

Modifier and Type	Method	Description
(package private) static int	appendMethodSignature(Class<?>[] argTypes, Class<?> returnType, StringBuilder sb)
private static void	appendOverridableMethods(Class<?> c, ArrayList<Method> list, HashSet<String> skip)
private static StringBuilder	appendTypeString(StringBuilder sb, Class<?> type)
static Object	callMethod(ContextFactory factory, Scriptable thisObj, Function f, Object[] args, long argsToWrap)	Utility method which dynamically binds a Context to the current thread, if none already exists.
static Object	convertResult(Object result, Class<?> c)
static byte[]	createAdapterCode(ObjToIntMap functionNames, String adapterName, Class<?> superClass, Class<?>[] interfaces, String scriptClassName)
static Scriptable	createAdapterWrapper(Scriptable obj, Object adapter)
private static Object	doCall(Context cx, Scriptable scope, Scriptable thisObj, Function f, Object[] args, long argsToWrap)
Object	execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args)	'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned
private static void	generateCtor(ClassFileWriter cfw, String adapterName, String superName, Constructor<?> superCtor)
private static void	generateEmptyCtor(ClassFileWriter cfw, String adapterName, String superName, String scriptClassName)
private static void	generateMethod(ClassFileWriter cfw, String genName, String methodName, Class<?>[] parms, Class<?> returnType, boolean convertResult)
private static void	generatePopResult(ClassFileWriter cfw, Class<?> retType)	Generates code to return a Java type, after calling a Java method that returns the same type.
private static int	generatePushParam(ClassFileWriter cfw, int paramOffset, Class<?> paramType)	Generates code to push typed parameters onto the operand stack prior to a direct Java method call.
(package private) static void	generatePushWrappedArgs(ClassFileWriter cfw, Class<?>[] argTypes, int arrayLength)	Generates code to wrap Java arguments into Object[].
(package private) static void	generateReturnResult(ClassFileWriter cfw, Class<?> retType, boolean callConvertResult)	Generates code to convert a wrapped value type to a primitive type.
private static void	generateSerialCtor(ClassFileWriter cfw, String adapterName, String superName)
private static void	generateSuper(ClassFileWriter cfw, String genName, String superName, String methodName, String methodSignature, Class<?>[] parms, Class<?> returnType)	Generates a method called "super$methodName()" which can be called from JavaScript that is equivalent to calling "super.methodName()" from Java.
private static int	generateWrapArg(ClassFileWriter cfw, int paramOffset, Class<?> argType)	Generates code to wrap Java argument into Object.
private static Class<?>	getAdapterClass(Scriptable scope, Class<?> superClass, Class<?>[] interfaces, Scriptable obj)
static Object	getAdapterSelf(Class<?> adapterClass, Object adapter)
(package private) static int[]	getArgsToConvert(Class<?>[] argTypes)
static Function	getFunction(Scriptable obj, String functionName)
private static String	getMethodSignature(Method method, Class<?>[] argTypes)	Returns a fully qualified method name concatenated with its signature.
private static ObjToIntMap	getObjectFunctionNames(Scriptable obj)
(package private) static Method[]	getOverridableMethods(Class<?> clazz)
static void	init(Context cx, Scriptable scope, boolean sealed)
(package private) static Object	js_createAdapter(Context cx, Scriptable scope, Object[] args)
(package private) static Class<?>	loadAdapterClass(String className, byte[] classBytes)
static Object	readAdapterObject(Scriptable self, ObjectInputStream in)
static Scriptable	runScript(Script script)
static void	writeAdapterObject(Object javaObject, ObjectOutputStream out)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

FTAG

private static final Object FTAG

Id_JavaAdapter

private static final int Id_JavaAdapter

See Also:

• Constant Field Values

Constructor Details

JavaAdapter

public JavaAdapter()

Method Details

init

public static void init(Context cx,
 Scriptable scope,
 boolean sealed)

execIdCall

public Object execIdCall(IdFunctionObject f,
 Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

Description copied from interface: IdFunctionCall

'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned

Specified by:

execIdCall in interface IdFunctionCall

convertResult

public static Object convertResult(Object result,
 Class<?> c)

createAdapterWrapper

public static Scriptable createAdapterWrapper(Scriptable obj,
 Object adapter)

getAdapterSelf

public static Object getAdapterSelf(Class<?> adapterClass,
 Object adapter)
                             throws NoSuchFieldException,
IllegalAccessException

Throws:

NoSuchFieldException

IllegalAccessException

js_createAdapter

static Object js_createAdapter(Context cx,
 Scriptable scope,
 Object[] args)

writeAdapterObject

public static void writeAdapterObject(Object javaObject,
 ObjectOutputStream out)
                               throws IOException

Throws:

IOException

readAdapterObject

public static Object readAdapterObject(Scriptable self,
 ObjectInputStream in)
                                throws IOException,
ClassNotFoundException

Throws:

IOException

ClassNotFoundException

getObjectFunctionNames

private static ObjToIntMap getObjectFunctionNames(Scriptable obj)

getAdapterClass

private static Class<?> getAdapterClass(Scriptable scope,
 Class<?> superClass,
 Class<?>[] interfaces,
 Scriptable obj)

createAdapterCode

public static byte[] createAdapterCode(ObjToIntMap functionNames,
 String adapterName,
 Class<?> superClass,
 Class<?>[] interfaces,
 String scriptClassName)

getOverridableMethods

static Method[] getOverridableMethods(Class<?> clazz)

appendOverridableMethods

private static void appendOverridableMethods(Class<?> c,
 ArrayList<Method> list,
 HashSet<String> skip)

loadAdapterClass

static Class<?> loadAdapterClass(String className,
 byte[] classBytes)

getFunction

public static Function getFunction(Scriptable obj,
 String functionName)

callMethod

public static Object callMethod(ContextFactory factory,
 Scriptable thisObj,
 Function f,
 Object[] args,
 long argsToWrap)

Utility method which dynamically binds a Context to the current thread, if none already exists.

doCall

private static Object doCall(Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Function f,
 Object[] args,
 long argsToWrap)

runScript

public static Scriptable runScript(Script script)

generateCtor

private static void generateCtor(ClassFileWriter cfw,
 String adapterName,
 String superName,
 Constructor<?> superCtor)

generateSerialCtor

private static void generateSerialCtor(ClassFileWriter cfw,
 String adapterName,
 String superName)

generateEmptyCtor

private static void generateEmptyCtor(ClassFileWriter cfw,
 String adapterName,
 String superName,
 String scriptClassName)

generatePushWrappedArgs

static void generatePushWrappedArgs(ClassFileWriter cfw,
 Class<?>[] argTypes,
 int arrayLength)

Generates code to wrap Java arguments into Object[]. Non-primitive Java types are left as-is pending conversion in the helper method. Leaves the array object on the top of the stack.

generateWrapArg

private static int generateWrapArg(ClassFileWriter cfw,
 int paramOffset,
 Class<?> argType)

Generates code to wrap Java argument into Object. Non-primitive Java types are left unconverted pending conversion in the helper method. Leaves the wrapper object on the top of the stack.

generateReturnResult

static void generateReturnResult(ClassFileWriter cfw,
 Class<?> retType,
 boolean callConvertResult)

Generates code to convert a wrapped value type to a primitive type. Handles unwrapping java.lang.Boolean, and java.lang.Number types. Generates the appropriate RETURN bytecode.

generateMethod

private static void generateMethod(ClassFileWriter cfw,
 String genName,
 String methodName,
 Class<?>[] parms,
 Class<?> returnType,
 boolean convertResult)

generatePushParam

private static int generatePushParam(ClassFileWriter cfw,
 int paramOffset,
 Class<?> paramType)

Generates code to push typed parameters onto the operand stack prior to a direct Java method call.

generatePopResult

private static void generatePopResult(ClassFileWriter cfw,
 Class<?> retType)

Generates code to return a Java type, after calling a Java method that returns the same type. Generates the appropriate RETURN bytecode.

generateSuper

private static void generateSuper(ClassFileWriter cfw,
 String genName,
 String superName,
 String methodName,
 String methodSignature,
 Class<?>[] parms,
 Class<?> returnType)

Generates a method called "super$methodName()" which can be called from JavaScript that is equivalent to calling "super.methodName()" from Java. Eventually, this may be supported directly in JavaScript.

getMethodSignature

private static String getMethodSignature(Method method,
 Class<?>[] argTypes)

Returns a fully qualified method name concatenated with its signature.

appendMethodSignature

static int appendMethodSignature(Class<?>[] argTypes,
 Class<?> returnType,
 StringBuilder sb)

appendTypeString

private static StringBuilder appendTypeString(StringBuilder sb,
 Class<?> type)

getArgsToConvert

static int[] getArgsToConvert(Class<?>[] argTypes)