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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically
embedded into Java applications to provide scripting to end users.
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
/**
* This class is used by the V8 extension "Error.prepareStackTrace." It is passed to that function,
* which may then use it to format the stack as it sees fit.
*/
public class NativeCallSite extends IdScriptableObject {
private static final long serialVersionUID = 2688372752566593594L;
private static final String CALLSITE_TAG = "CallSite";
private ScriptStackElement element;
static void init(Scriptable scope, boolean sealed) {
NativeCallSite cs = new NativeCallSite();
cs.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
}
static NativeCallSite make(Scriptable scope, Scriptable ctorObj) {
NativeCallSite cs = new NativeCallSite();
Scriptable proto = (Scriptable) (ctorObj.get("prototype", ctorObj));
cs.setParentScope(scope);
cs.setPrototype(proto);
return cs;
}
private NativeCallSite() {}
void setElement(ScriptStackElement elt) {
this.element = elt;
}
@Override
public String getClassName() {
return "CallSite";
}
@Override
protected void initPrototypeId(int id) {
String s;
int arity;
switch (id) {
case Id_constructor:
arity = 0;
s = "constructor";
break;
case Id_getThis:
arity = 0;
s = "getThis";
break;
case Id_getTypeName:
arity = 0;
s = "getTypeName";
break;
case Id_getFunction:
arity = 0;
s = "getFunction";
break;
case Id_getFunctionName:
arity = 0;
s = "getFunctionName";
break;
case Id_getMethodName:
arity = 0;
s = "getMethodName";
break;
case Id_getFileName:
arity = 0;
s = "getFileName";
break;
case Id_getLineNumber:
arity = 0;
s = "getLineNumber";
break;
case Id_getColumnNumber:
arity = 0;
s = "getColumnNumber";
break;
case Id_getEvalOrigin:
arity = 0;
s = "getEvalOrigin";
break;
case Id_isToplevel:
arity = 0;
s = "isToplevel";
break;
case Id_isEval:
arity = 0;
s = "isEval";
break;
case Id_isNative:
arity = 0;
s = "isNative";
break;
case Id_isConstructor:
arity = 0;
s = "isConstructor";
break;
case Id_toString:
arity = 0;
s = "toString";
break;
default:
throw new IllegalArgumentException(String.valueOf(id));
}
initPrototypeMethod(CALLSITE_TAG, id, s, arity);
}
@Override
public Object execIdCall(
IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
if (!f.hasTag(CALLSITE_TAG)) {
return super.execIdCall(f, cx, scope, thisObj, args);
}
int id = f.methodId();
switch (id) {
case Id_constructor:
return make(scope, f);
case Id_getFunctionName:
return getFunctionName(thisObj);
case Id_getFileName:
return getFileName(thisObj);
case Id_getLineNumber:
return getLineNumber(thisObj);
case Id_getThis:
case Id_getTypeName:
case Id_getFunction:
case Id_getColumnNumber:
return Undefined.instance;
case Id_getMethodName:
return null;
case Id_getEvalOrigin:
case Id_isEval:
case Id_isConstructor:
case Id_isNative:
case Id_isToplevel:
return Boolean.FALSE;
case Id_toString:
return js_toString(thisObj);
default:
throw new IllegalArgumentException(String.valueOf(id));
}
}
@Override
public String toString() {
if (element == null) {
return "";
}
return element.toString();
}
private static Object js_toString(Scriptable obj) {
while (obj != null && !(obj instanceof NativeCallSite)) {
obj = obj.getPrototype();
}
if (obj == null) {
return NOT_FOUND;
}
NativeCallSite cs = (NativeCallSite) obj;
StringBuilder sb = new StringBuilder();
cs.element.renderJavaStyle(sb);
return sb.toString();
}
private static Object getFunctionName(Scriptable obj) {
while (obj != null && !(obj instanceof NativeCallSite)) {
obj = obj.getPrototype();
}
if (obj == null) {
return NOT_FOUND;
}
NativeCallSite cs = (NativeCallSite) obj;
return (cs.element == null ? null : cs.element.functionName);
}
private static Object getFileName(Scriptable obj) {
while (obj != null && !(obj instanceof NativeCallSite)) {
obj = obj.getPrototype();
}
if (obj == null) {
return NOT_FOUND;
}
NativeCallSite cs = (NativeCallSite) obj;
return (cs.element == null ? null : cs.element.fileName);
}
private static Object getLineNumber(Scriptable obj) {
while (obj != null && !(obj instanceof NativeCallSite)) {
obj = obj.getPrototype();
}
if (obj == null) {
return NOT_FOUND;
}
NativeCallSite cs = (NativeCallSite) obj;
if ((cs.element == null) || (cs.element.lineNumber < 0)) {
return Undefined.instance;
}
return Integer.valueOf(cs.element.lineNumber);
}
@Override
protected int findPrototypeId(String s) {
int id;
switch (s) {
case "constructor":
id = Id_constructor;
break;
case "getThis":
id = Id_getThis;
break;
case "getTypeName":
id = Id_getTypeName;
break;
case "getFunction":
id = Id_getFunction;
break;
case "getFunctionName":
id = Id_getFunctionName;
break;
case "getMethodName":
id = Id_getMethodName;
break;
case "getFileName":
id = Id_getFileName;
break;
case "getLineNumber":
id = Id_getLineNumber;
break;
case "getColumnNumber":
id = Id_getColumnNumber;
break;
case "getEvalOrigin":
id = Id_getEvalOrigin;
break;
case "isToplevel":
id = Id_isToplevel;
break;
case "isEval":
id = Id_isEval;
break;
case "isNative":
id = Id_isNative;
break;
case "isConstructor":
id = Id_isConstructor;
break;
case "toString":
id = Id_toString;
break;
default:
id = 0;
break;
}
return id;
}
private static final int Id_constructor = 1,
Id_getThis = 2,
Id_getTypeName = 3,
Id_getFunction = 4,
Id_getFunctionName = 5,
Id_getMethodName = 6,
Id_getFileName = 7,
Id_getLineNumber = 8,
Id_getColumnNumber = 9,
Id_getEvalOrigin = 10,
Id_isToplevel = 11,
Id_isEval = 12,
Id_isNative = 13,
Id_isConstructor = 14,
Id_toString = 15,
MAX_PROTOTYPE_ID = 15;
}
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