src/jdk/nashorn/api/scripting/NashornException.java

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  28 import java.util.ArrayList;
  29 import java.util.List;
  30 import jdk.nashorn.internal.codegen.CompilerConstants;
  31 import jdk.nashorn.internal.runtime.ECMAErrors;
  32 import jdk.nashorn.internal.runtime.ScriptObject;
  33 
  34 /**
  35  * This is base exception for all Nashorn exceptions. These originate from
  36  * user's ECMAScript code. Example: script parse errors, exceptions thrown from
  37  * scripts. Note that ScriptEngine methods like "eval", "invokeMethod",
  38  * "invokeFunction" will wrap this as ScriptException and throw it. But, there
  39  * are cases where user may need to access this exception (or implementation
  40  * defined subtype of this). For example, if java interface is implemented by a
  41  * script object or Java access to script object properties via java.util.Map
  42  * interface. In these cases, user code will get an instance of this or
  43  * implementation defined subclass.
  44  */
  45 @SuppressWarnings("serial")
  46 public abstract class NashornException extends RuntimeException {
  47     // script file name
  48     private final String fileName;
  49     // script line number
  50     private final int line;
  51     // script column number
  52     private final int column;
  53     // underlying ECMA error object - lazily initialized
  54     private Object ecmaError;
  55 
  56     /** script source name used for "engine.js" */
  57     public static final String ENGINE_SCRIPT_SOURCE_NAME = "nashorn:engine/resources/engine.js";
  58 
  59     /**
  60      * Constructor
  61      *
  62      * @param msg       exception message
  63      * @param fileName  file name
  64      * @param line      line number
  65      * @param column    column number
  66      */
  67     protected NashornException(final String msg, final String fileName, final int line, final int column) {
  68         this(msg, null, fileName, line, column);
  69     }
  70 
  71     /**
  72      * Constructor


 108                 this.fileName = ste.getFileName();
 109                 this.line = ste.getLineNumber();
 110                 return;
 111             }
 112         }
 113 
 114         this.fileName = null;
 115         this.line = 0;
 116     }
 117 
 118     /**
 119      * Get the source file name for this {@code NashornException}
 120      *
 121      * @return the file name
 122      */
 123     public final String getFileName() {
 124         return fileName;
 125     }
 126 
 127     /**









 128      * Get the line number for this {@code NashornException}
 129      *
 130      * @return the line number
 131      */
 132     public final int getLineNumber() {
 133         return line;
 134     }
 135 
 136     /**









 137      * Get the column for this {@code NashornException}
 138      *
 139      * @return the column
 140      */
 141     public final int getColumnNumber() {
 142         return column;
 143     }
 144 
 145     /**









 146      * Returns array javascript stack frames from the given exception object.
 147      *
 148      * @param exception exception from which stack frames are retrieved and filtered
 149      * @return array of javascript stack frames
 150      */
 151     public static StackTraceElement[] getScriptFrames(final Throwable exception) {
 152         final StackTraceElement[] frames = exception.getStackTrace();
 153         final List<StackTraceElement> filtered = new ArrayList<>();
 154         for (final StackTraceElement st : frames) {
 155             if (ECMAErrors.isScriptFrame(st)) {
 156                 final String className = "<" + st.getFileName() + ">";
 157                 String methodName = st.getMethodName();
 158                 if (methodName.equals(CompilerConstants.RUN_SCRIPT.symbolName())) {
 159                     methodName = "<program>";
 160                 }
 161 
 162                 if (methodName.contains(CompilerConstants.ANON_FUNCTION_PREFIX.symbolName())) {
 163                     methodName = "<anonymous>";
 164                 }
 165 


 191         final int len = buf.length();
 192         // remove trailing '\n'
 193         if (len > 0) {
 194             assert buf.charAt(len - 1) == '\n';
 195             buf.deleteCharAt(len - 1);
 196         }
 197         return buf.toString();
 198     }
 199 
 200     protected Object getThrown() {
 201         return null;
 202     }
 203 
 204     protected NashornException initEcmaError(final ScriptObject global) {
 205         if (ecmaError != null) {
 206             return this; // initialized already!
 207         }
 208 
 209         final Object thrown = getThrown();
 210         if (thrown instanceof ScriptObject) {
 211             ecmaError = ScriptObjectMirror.wrap(thrown, global);
 212         } else {
 213             ecmaError = thrown;
 214         }
 215 
 216         return this;
 217     }
 218 
 219     /**
 220      * Return the underlying ECMA error object, if available.
 221      *
 222      * @return underlying ECMA Error object's mirror or whatever was thrown
 223      *         from script such as a String, Number or a Boolean.
 224      */
 225     public Object getEcmaError() {
 226         return ecmaError;










 227     }
 228 }


  28 import java.util.ArrayList;
  29 import java.util.List;
  30 import jdk.nashorn.internal.codegen.CompilerConstants;
  31 import jdk.nashorn.internal.runtime.ECMAErrors;
  32 import jdk.nashorn.internal.runtime.ScriptObject;
  33 
  34 /**
  35  * This is base exception for all Nashorn exceptions. These originate from
  36  * user's ECMAScript code. Example: script parse errors, exceptions thrown from
  37  * scripts. Note that ScriptEngine methods like "eval", "invokeMethod",
  38  * "invokeFunction" will wrap this as ScriptException and throw it. But, there
  39  * are cases where user may need to access this exception (or implementation
  40  * defined subtype of this). For example, if java interface is implemented by a
  41  * script object or Java access to script object properties via java.util.Map
  42  * interface. In these cases, user code will get an instance of this or
  43  * implementation defined subclass.
  44  */
  45 @SuppressWarnings("serial")
  46 public abstract class NashornException extends RuntimeException {
  47     // script file name
  48     private String fileName;
  49     // script line number
  50     private int line;
  51     // script column number
  52     private int column;
  53     // underlying ECMA error object - lazily initialized
  54     private Object ecmaError;
  55 
  56     /** script source name used for "engine.js" */
  57     public static final String ENGINE_SCRIPT_SOURCE_NAME = "nashorn:engine/resources/engine.js";
  58 
  59     /**
  60      * Constructor
  61      *
  62      * @param msg       exception message
  63      * @param fileName  file name
  64      * @param line      line number
  65      * @param column    column number
  66      */
  67     protected NashornException(final String msg, final String fileName, final int line, final int column) {
  68         this(msg, null, fileName, line, column);
  69     }
  70 
  71     /**
  72      * Constructor


 108                 this.fileName = ste.getFileName();
 109                 this.line = ste.getLineNumber();
 110                 return;
 111             }
 112         }
 113 
 114         this.fileName = null;
 115         this.line = 0;
 116     }
 117 
 118     /**
 119      * Get the source file name for this {@code NashornException}
 120      *
 121      * @return the file name
 122      */
 123     public final String getFileName() {
 124         return fileName;
 125     }
 126 
 127     /**
 128      * Set the source file name for this {@code NashornException}
 129      *
 130      * @param fileName the file name
 131      */
 132     public final void setFileName(final String fileName) {
 133         this.fileName = fileName;
 134     }
 135 
 136     /**
 137      * Get the line number for this {@code NashornException}
 138      *
 139      * @return the line number
 140      */
 141     public final int getLineNumber() {
 142         return line;
 143     }
 144 
 145     /**
 146      * Set the line number for this {@code NashornException}
 147      *
 148      * @param line the line number
 149      */
 150     public final void setLineNumber(final int line) {
 151         this.line = line;
 152     }
 153 
 154     /**
 155      * Get the column for this {@code NashornException}
 156      *
 157      * @return the column number
 158      */
 159     public final int getColumnNumber() {
 160         return column;
 161     }
 162 
 163     /**
 164      * Set the column for this {@code NashornException}
 165      *
 166      * @param column the column number
 167      */
 168     public final void setColumnNumber(final int column) {
 169         this.column = column;
 170     }
 171 
 172     /**
 173      * Returns array javascript stack frames from the given exception object.
 174      *
 175      * @param exception exception from which stack frames are retrieved and filtered
 176      * @return array of javascript stack frames
 177      */
 178     public static StackTraceElement[] getScriptFrames(final Throwable exception) {
 179         final StackTraceElement[] frames = exception.getStackTrace();
 180         final List<StackTraceElement> filtered = new ArrayList<>();
 181         for (final StackTraceElement st : frames) {
 182             if (ECMAErrors.isScriptFrame(st)) {
 183                 final String className = "<" + st.getFileName() + ">";
 184                 String methodName = st.getMethodName();
 185                 if (methodName.equals(CompilerConstants.RUN_SCRIPT.symbolName())) {
 186                     methodName = "<program>";
 187                 }
 188 
 189                 if (methodName.contains(CompilerConstants.ANON_FUNCTION_PREFIX.symbolName())) {
 190                     methodName = "<anonymous>";
 191                 }
 192 


 218         final int len = buf.length();
 219         // remove trailing '\n'
 220         if (len > 0) {
 221             assert buf.charAt(len - 1) == '\n';
 222             buf.deleteCharAt(len - 1);
 223         }
 224         return buf.toString();
 225     }
 226 
 227     protected Object getThrown() {
 228         return null;
 229     }
 230 
 231     protected NashornException initEcmaError(final ScriptObject global) {
 232         if (ecmaError != null) {
 233             return this; // initialized already!
 234         }
 235 
 236         final Object thrown = getThrown();
 237         if (thrown instanceof ScriptObject) {
 238             setEcmaError(ScriptObjectMirror.wrap(thrown, global));
 239         } else {
 240             setEcmaError(thrown);
 241         }
 242 
 243         return this;
 244     }
 245 
 246     /**
 247      * Return the underlying ECMA error object, if available.
 248      *
 249      * @return underlying ECMA Error object's mirror or whatever was thrown
 250      *         from script such as a String, Number or a Boolean.
 251      */
 252     public Object getEcmaError() {
 253         return ecmaError;
 254     }
 255 
 256     /**
 257      * Return the underlying ECMA error object, if available.
 258      *
 259      * @param ecmaError underlying ECMA Error object's mirror or whatever was thrown
 260      *         from script such as a String, Number or a Boolean.
 261      */
 262     public void setEcmaError(final Object ecmaError) {
 263         this.ecmaError = ecmaError;
 264     }
 265 }