--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/ECMAException.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.runtime;
+
+import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
+import static jdk.nashorn.internal.codegen.CompilerConstants.virtualField;
+import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
+
+import javax.script.ScriptException;
+import jdk.nashorn.api.scripting.NashornException;
+import jdk.nashorn.internal.codegen.CompilerConstants.Call;
+import jdk.nashorn.internal.codegen.CompilerConstants.FieldAccess;
+
+/**
+ * Exception used to implement ECMAScript "throw" from scripts. The actual thrown
+ * object from script need not be a Java exception and so it is wrapped as an
+ * instance field called "thrown" here. This exception class is also used to
+ * represent ECMA errors thrown from runtime code (for example, TypeError,
+ * ReferenceError thrown from Nashorn engine runtime).
+ */
+@SuppressWarnings("serial")
+public final class ECMAException extends NashornException {
+ /**
+ * Method handle pointing to the constructor {@link ECMAException#create(Object, String, int, int)},
+ */
+ public static final Call CREATE = staticCallNoLookup(ECMAException.class, "create", ECMAException.class, Object.class, String.class, int.class, int.class);
+
+ /** Field handle to the{@link ECMAException#thrown} field, so that it can be accessed from generated code */
+ public static final FieldAccess THROWN = virtualField(ECMAException.class, "thrown", Object.class);
+
+ private static final String EXCEPTION_PROPERTY = "nashornException";
+
+ /** Object thrown. */
+ public final Object thrown;
+
+ /**
+ * Constructor. Called from the factory method 'create'.
+ *
+ * @param thrown object to be thrown
+ * @param fileName script file name
+ * @param line line number of throw
+ * @param column column number of throw
+ */
+ private ECMAException(final Object thrown, final String fileName, final int line, final int column) {
+ super(ScriptRuntime.safeToString(thrown), asThrowable(thrown), fileName, line, column);
+ this.thrown = thrown;
+ setExceptionToThrown();
+ }
+
+ /**
+ * Constructor. This is called from the runtime code.
+ *
+ * @param thrown object to be thrown
+ * @param cause Java exception that triggered this throw
+ */
+ public ECMAException(final Object thrown, final Throwable cause) {
+ super(ScriptRuntime.safeToString(thrown), cause);
+ this.thrown = thrown;
+ setExceptionToThrown();
+ }
+
+ /**
+ * Factory method to retrieve the underlying exception or create an exception.
+ * This method is called from the generated code.
+ *
+ * @param thrown object to be thrown
+ * @param fileName script file name
+ * @param line line number of throw
+ * @param column column number of throw
+ * @return ECMAException object
+ */
+ public static ECMAException create(final Object thrown, final String fileName, final int line, final int column) {
+ // If thrown object is an Error or sub-object like TypeError, then
+ // an ECMAException object has been already initialized at constructor.
+ if (thrown instanceof ScriptObject) {
+ final Object exception = getException((ScriptObject)thrown);
+ if (exception instanceof ECMAException) {
+ final ECMAException ee = (ECMAException)exception;
+ // Make sure exception has correct thrown reference because that's what will end up getting caught.
+ if (ee.getThrown() == thrown) {
+ // copy over file name, line number and column number.
+ ee.setFileName(fileName);
+ ee.setLineNumber(line);
+ ee.setColumnNumber(column);
+ return ee;
+ }
+ }
+ }
+
+ return new ECMAException(thrown, fileName, line, column);
+ }
+
+ /**
+ * Get the thrown object
+ * @return thrown object
+ */
+ @Override
+ public Object getThrown() {
+ return thrown;
+ }
+
+ @Override
+ public String toString() {
+ final StringBuilder sb = new StringBuilder();
+ final String fileName = getFileName();
+ final int line = getLineNumber();
+ final int column = getColumnNumber();
+
+ if (fileName != null) {
+ sb.append(fileName);
+ if (line >= 0) {
+ sb.append(':');
+ sb.append(line);
+ }
+ if (column >= 0) {
+ sb.append(':');
+ sb.append(column);
+ }
+ sb.append(' ');
+ } else {
+ sb.append("ECMAScript Exception: ");
+ }
+
+ sb.append(getMessage());
+ return sb.toString();
+ }
+
+ /**
+ * Get the {@link ECMAException}, i.e. the underlying Java object for the
+ * JavaScript error object from a {@link ScriptObject} representing an error
+ *
+ * @param errObj the error object
+ * @return a {@link ECMAException}
+ */
+ public static Object getException(final ScriptObject errObj) {
+ // Exclude inherited properties that may belong to errors in the prototype chain.
+ if (errObj.hasOwnProperty(ECMAException.EXCEPTION_PROPERTY)) {
+ return errObj.get(ECMAException.EXCEPTION_PROPERTY);
+ }
+ return null;
+ }
+
+ /**
+ * Print the stack trace for a {@code ScriptObject} representing an error
+ *
+ * @param errObj the error object
+ * @return undefined
+ */
+ public static Object printStackTrace(final ScriptObject errObj) {
+ final Object exception = getException(errObj);
+ if (exception instanceof Throwable) {
+ ((Throwable)exception).printStackTrace(Context.getCurrentErr());
+ } else {
+ Context.err("<stack trace not available>");
+ }
+ return UNDEFINED;
+ }
+
+ /**
+ * Get the line number for a {@code ScriptObject} representing an error
+ *
+ * @param errObj the error object
+ * @return the line number, or undefined if wrapped exception is not a ParserException
+ */
+ public static Object getLineNumber(final ScriptObject errObj) {
+ final Object e = getException(errObj);
+ if (e instanceof NashornException) {
+ return ((NashornException)e).getLineNumber();
+ } else if (e instanceof ScriptException) {
+ return ((ScriptException)e).getLineNumber();
+ }
+
+ return UNDEFINED;
+ }
+
+ /**
+ * Get the column number for a {@code ScriptObject} representing an error
+ *
+ * @param errObj the error object
+ * @return the column number, or undefined if wrapped exception is not a ParserException
+ */
+ public static Object getColumnNumber(final ScriptObject errObj) {
+ final Object e = getException(errObj);
+ if (e instanceof NashornException) {
+ return ((NashornException)e).getColumnNumber();
+ } else if (e instanceof ScriptException) {
+ return ((ScriptException)e).getColumnNumber();
+ }
+
+ return UNDEFINED;
+ }
+
+ /**
+ * Get the file name for a {@code ScriptObject} representing an error
+ *
+ * @param errObj the error object
+ * @return the file name, or undefined if wrapped exception is not a ParserException
+ */
+ public static Object getFileName(final ScriptObject errObj) {
+ final Object e = getException(errObj);
+ if (e instanceof NashornException) {
+ return ((NashornException)e).getFileName();
+ } else if (e instanceof ScriptException) {
+ return ((ScriptException)e).getFileName();
+ }
+
+ return UNDEFINED;
+ }
+
+ /**
+ * Stateless string conversion for an error object
+ *
+ * @param errObj the error object
+ * @return string representation of {@code errObj}
+ */
+ public static String safeToString(final ScriptObject errObj) {
+ Object name = UNDEFINED;
+ try {
+ name = errObj.get("name");
+ } catch (final Exception e) {
+ //ignored
+ }
+
+ if (name == UNDEFINED) {
+ name = "Error";
+ } else {
+ name = ScriptRuntime.safeToString(name);
+ }
+
+ Object msg = UNDEFINED;
+ try {
+ msg = errObj.get("message");
+ } catch (final Exception e) {
+ //ignored
+ }
+
+ if (msg == UNDEFINED) {
+ msg = "";
+ } else {
+ msg = ScriptRuntime.safeToString(msg);
+ }
+
+ if (((String)name).isEmpty()) {
+ return (String)msg;
+ }
+
+ if (((String)msg).isEmpty()) {
+ return (String)name;
+ }
+
+ return name + ": " + msg;
+ }
+
+ private static Throwable asThrowable(final Object obj) {
+ return (obj instanceof Throwable)? (Throwable)obj : null;
+ }
+
+ private void setExceptionToThrown() {
+ /*
+ * Nashorn extension: errorObject.nashornException
+ * Expose this exception via "nashornException" property of on the
+ * thrown object. This exception object can be used to print stack
+ * trace and fileName, line number etc. from script code.
+ */
+
+ if (thrown instanceof ScriptObject) {
+ final ScriptObject sobj = (ScriptObject)thrown;
+ if (!sobj.has(EXCEPTION_PROPERTY)) {
+ sobj.addOwnProperty(EXCEPTION_PROPERTY, Property.NOT_ENUMERABLE, this);
+ } else {
+ sobj.set(EXCEPTION_PROPERTY, this, 0);
+ }
+ }
+ }
+}