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java/javax/servlet/ServletException.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 javax.servlet;
+
+/**
+ * Defines a general exception a servlet can throw when it encounters
+ * difficulty.
+ */
+public class ServletException extends Exception {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Constructs a new servlet exception.
+     */
+    public ServletException() {
+        super();
+    }
+
+    /**
+     * Constructs a new servlet exception with the specified message. The
+     * message can be written to the server log and/or displayed for the user.
+     *
+     * @param message
+     *            a <code>String</code> specifying the text of the exception
+     *            message
+     */
+    public ServletException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a new servlet exception when the servlet needs to throw an
+     * exception and include a message about the "root cause" exception that
+     * interfered with its normal operation, including a description message.
+     *
+     * @param message
+     *            a <code>String</code> containing the text of the exception
+     *            message
+     * @param rootCause
+     *            the <code>Throwable</code> exception that interfered with the
+     *            servlet's normal operation, making this servlet exception
+     *            necessary
+     */
+    public ServletException(String message, Throwable rootCause) {
+        super(message, rootCause);
+    }
+
+    /**
+     * Constructs a new servlet exception when the servlet needs to throw an
+     * exception and include a message about the "root cause" exception that
+     * interfered with its normal operation. The exception's message is based on
+     * the localized message of the underlying exception.
+     * <p>
+     * This method calls the <code>getLocalizedMessage</code> method on the
+     * <code>Throwable</code> exception to get a localized exception message.
+     * When subclassing <code>ServletException</code>, this method can be
+     * overridden to create an exception message designed for a specific locale.
+     *
+     * @param rootCause
+     *            the <code>Throwable</code> exception that interfered with the
+     *            servlet's normal operation, making the servlet exception
+     *            necessary
+     */
+    public ServletException(Throwable rootCause) {
+        super(rootCause);
+    }
+
+    /**
+     * Returns the exception that caused this servlet exception.
+     *
+     * @return the <code>Throwable</code> that caused this servlet exception
+     */
+    public Throwable getRootCause() {
+        return getCause();
+    }
+}