jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/runtime/ECMAException.java@47099609a48b (annotated)

src/jdk/nashorn/internal/runtime/ECMAException.java@47099609a48b (annotated)

src/jdk/nashorn/internal/runtime/ECMAException.java

Mon, 01 Jul 2013 17:21:09 +0530

author: sundar
date: Mon, 01 Jul 2013 17:21:09 +0530
changeset 389: 47099609a48b
parent 378: 39e17373d8df
child 748: a4a1d38f0294
permissions: -rw-r--r--

8019482: Number("0x0.0p0") should evaluate to NaN
Reviewed-by: lagergren

 /*
  * 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.constructorNoLookup;
 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#ECMAException(Object, String, int, int)},
      */
     public static final Call THROW_INIT = constructorNoLookup(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. This is called from generated code to implement the {@code throw}
      * instruction from generated script code
      *
      * @param thrown    object to be thrown
      * @param fileName  script file name
      * @param line      line number of throw
      * @param column    column number of throw
      */
     public 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 runtime code in Nashorn to throw things like
      * type errors.
      *
      * @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();
     }
     /**
      * Get the thrown object
      * @return thrown object
      */
     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) {
         return errObj.get(ECMAException.EXCEPTION_PROPERTY);
     }
     /**
      * 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);
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/runtime/ECMAException.java@47099609a48b (annotated)

src/jdk/nashorn/internal/runtime/ECMAException.java