| /* |
| * Copyright (c) 2012, the Dart project authors. |
| * |
| * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except |
| * in compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.dart.tools.core.model; |
| |
| import com.google.dart.tools.core.internal.model.DartModelStatusImpl; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| |
| /** |
| * Instances of the class <code>DartModelException</code> represent a failure in the Dart model. |
| * Dart model exceptions contain a Dart-specific status object describing the cause of the |
| * exception. |
| * |
| * @coverage dart.tools.core.model |
| */ |
| public class DartModelException extends CoreException { |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * The code exception that caused this model exception, or <code>null</code> if this exception was |
| * not caused by a model exception. |
| */ |
| private CoreException nestedCoreException; |
| |
| /** |
| * Creates a Dart model exception for the given <code>CoreException</code>. Equivalent to |
| * <code>DartModelException(exception, DartModelStatusConstants.CORE_EXCEPTION</code> . |
| * |
| * @param exception the <code>CoreException</code> |
| */ |
| public DartModelException(CoreException exception) { |
| super(exception.getStatus()); |
| this.nestedCoreException = exception; |
| } |
| |
| /** |
| * Creates a Dart model exception for the given Dart-specific status object. |
| * |
| * @param status the Dart-specific status object |
| */ |
| public DartModelException(DartModelStatus status) { |
| super(status); |
| } |
| |
| /** |
| * Creates a Dart model exception that wrappers the given <code>Throwable</code>. The exception |
| * contains a Dart-specific status object with severity {@link IStatus.ERROR} and the given status |
| * code. |
| * |
| * @param e the <code>Throwable</code> |
| * @param code one of the Dart-specific status codes declared in |
| * <code>DartModelStatusConstants</code> |
| */ |
| public DartModelException(Throwable e, int code) { |
| this(new DartModelStatusImpl(code, e)); |
| } |
| |
| /** |
| * Return the Dart model status object for this exception. |
| * |
| * @return a status object |
| */ |
| public DartModelStatus getDartModelStatus() { |
| IStatus status = this.getStatus(); |
| if (status instanceof DartModelStatus) { |
| return (DartModelStatus) status; |
| } else { |
| // A regular IStatus is created only in the case of a CoreException. |
| // See bug 13492 Should handle JavaModelExceptions that contains |
| // CoreException more gracefully |
| return new DartModelStatusImpl(this.nestedCoreException); |
| } |
| } |
| |
| /** |
| * Return the underlying <code>Throwable</code> that caused the failure. |
| * |
| * @return the wrapped <code>Throwable</code>, or <code>null</code> if the direct case of the |
| * failure was at the Dart model layer |
| */ |
| public Throwable getException() { |
| if (this.nestedCoreException == null) { |
| return getStatus().getException(); |
| } else { |
| return this.nestedCoreException; |
| } |
| } |
| |
| /** |
| * Return <code>true</code> if this exception indicates that a Dart model element does not exist. |
| * Such exceptions have a status with a code of |
| * {@link DartModelStatusConstants.ELEMENT_DOES_NOT_EXIST} or |
| * {@link DartModelStatusConstants.ELEMENT_NOT_ON_CLASSPATH}. This is a convenience method. |
| * |
| * @return <code>true</code> if this exception indicates that a Dart model element does not exist |
| */ |
| public boolean isDoesNotExist() { |
| DartModelStatus javaModelStatus = getDartModelStatus(); |
| return javaModelStatus != null && javaModelStatus.isDoesNotExist(); |
| } |
| |
| /** |
| * Print this exception's stack trace to the given print stream. |
| * |
| * @param output the print stream |
| */ |
| @Override |
| public void printStackTrace(PrintStream output) { |
| synchronized (output) { |
| super.printStackTrace(output); |
| Throwable throwable = getException(); |
| if (throwable != null) { |
| output.print("Caused by: "); //$NON-NLS-1$ |
| throwable.printStackTrace(output); |
| } |
| } |
| } |
| |
| /** |
| * Print this exception's stack trace to the given print writer. |
| * |
| * @param output the print writer |
| */ |
| @Override |
| public void printStackTrace(PrintWriter output) { |
| synchronized (output) { |
| super.printStackTrace(output); |
| Throwable throwable = getException(); |
| if (throwable != null) { |
| output.print("Caused by: "); //$NON-NLS-1$ |
| throwable.printStackTrace(output); |
| } |
| } |
| } |
| |
| /* |
| * Return a printable representation of this exception suitable for debugging purposes only. |
| */ |
| @Override |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer.append("Dart Model Exception: "); //$NON-NLS-1$ |
| if (getException() != null) { |
| if (getException() instanceof CoreException) { |
| CoreException c = (CoreException) getException(); |
| buffer.append("Core Exception [code "); //$NON-NLS-1$ |
| buffer.append(c.getStatus().getCode()); |
| buffer.append("] "); //$NON-NLS-1$ |
| buffer.append(c.getStatus().getMessage()); |
| } else { |
| buffer.append(getException().toString()); |
| } |
| } else { |
| buffer.append(getStatus().toString()); |
| } |
| return buffer.toString(); |
| } |
| } |