private static double toDouble(Object value) {
if (value instanceof Number) {
return ((Number) value).doubleValue();
} else if (value instanceof String) {
return ScriptRuntime.toNumber((String) value);
} else if (value instanceof Scriptable) {
if (value instanceof Wrapper) {
// XXX: optimize tail-recursion?
return toDouble(((Wrapper) value).unwrap());
} else {
return ScriptRuntime.toNumber(value);
}
} else {
Method meth;
try {
meth = value.getClass().getMethod("doubleValue", (Class[]) null);
} catch (NoSuchMethodException e) {
meth = null;
} catch (SecurityException e) {
meth = null;
}
if (meth != null) {
try {
return ((Number) meth.invoke(value, (Object[]) null)).doubleValue();
} catch (IllegalAccessException e) {
// XXX: ignore, or error message?
reportConversionError(value, Double.TYPE);
} catch (InvocationTargetException e) {
// XXX: ignore, or error message?
reportConversionError(value, Double.TYPE);
}
}
return ScriptRuntime.toNumber(value.toString());
}
}
public static Object convertArg(Context cx, Scriptable scope, Object arg, int typeTag) {
switch (typeTag) {
case JAVA_STRING_TYPE:
if (arg instanceof String) {
return arg;
}
return ScriptRuntime.toString(arg);
case JAVA_INT_TYPE:
if (arg instanceof Integer) {
return arg;
}
return new Integer(ScriptRuntime.toInt32(arg));
case JAVA_BOOLEAN_TYPE:
if (arg instanceof Boolean) {
return arg;
}
return ScriptRuntime.toBoolean(arg) ? Boolean.TRUE : Boolean.FALSE;
case JAVA_DOUBLE_TYPE:
if (arg instanceof Double) {
return arg;
}
return new Double(ScriptRuntime.toNumber(arg));
case JAVA_SCRIPTABLE_TYPE:
if (arg instanceof Scriptable) {
return arg;
}
return ScriptRuntime.toObject(cx, scope, arg);
case JAVA_OBJECT_TYPE:
return arg;
default:
throw new IllegalArgumentException();
}
}
/**
* Take an object from the scripting layer and convert it to an int.
*
* @param obj
* @return int
*/
private int toInt(Object obj) {
int result = 0;
if (obj instanceof String) {
result = Integer.parseInt((String) obj);
} else if (obj instanceof Number) {
result = ((Number) obj).intValue();
} else if (obj instanceof Scriptable) {
Scriptable sobj = (Scriptable) obj;
if (sobj.getClassName().equals("Number")) {
result = (int) ScriptRuntime.toNumber(sobj);
}
}
return result;
}