- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- */
-
- package javax.servlet.jsp.tagext;
-
- import javax.servlet.jsp.*;
-
-
- /**
- * The auxiliary interface of a Tag, IterationTag or BodyTag tag
- * handler that wants additional hooks for managing resources.
- *
- * <p>This interface provides two new methods: doCatch(Throwable)
- * and doFinally(). The prototypical invocation is as follows:
- *
- * <pre>
- * h = get a Tag(); // get a tag handler, perhaps from pool
- *
- * h.setPageContext(pc); // initialize as desired
- * h.setParent(null);
- * h.setFoo("foo");
- *
- * // tag invocation protocol; see Tag.java
- * try {
- * doStartTag()...
- * ....
- * doEndTag()...
- * } catch (Throwable t) {
- * // react to exceptional condition
- * h.doCatch(t);
- * } finally {
- * // restore data invariants and release per-invocation resources
- * h.doFinally();
- * }
- *
- * ... other invocations perhaps with some new setters
- * ...
- * h.release(); // release long-term resources
- * </pre>
- */
-
- public interface TryCatchFinally {
-
- /**
- * Invoked if a Throwable occurs while evaluating the BODY
- * inside a tag or in any of the following methods:
- * Tag.doStartTag(), Tag.doEndTag(),
- * IterationTag.doAfterBody() and BodyTag.doInitBody().
- *
- * <p>This method is not invoked if the Throwable occurs during
- * one of the setter methods.
- *
- * <p>This method may throw an exception (the same or a new one)
- * that will be propagated further the nest chain. If an exception
- * is thrown, doFinally() will be invoked.
- *
- * <p>This method is intended to be used to respond to an exceptional
- * condition.
- *
- * @param t The throwable exception navigating through this tag.
- */
-
- void doCatch(Throwable t) throws Throwable;
-
- /**
- * Invoked in all cases after doEndTag() for any class implementing
- * Tag, IterationTag or BodyTag. This method is invoked even if
- * an exception has occurred in the BODY of the tag,
- * or in any of the following methods:
- * Tag.doStartTag(), Tag.doEndTag(),
- * IterationTag.doAfterBody() and BodyTag.doInitBody().
- *
- * <p>This method is not invoked if the Throwable occurs during
- * one of the setter methods.
- *
- * <p>This method should not throw an Exception.
- *
- * <p>This method is intended to maintain per-invocation data
- * integrity and resource management actions.
- */
-
- void doFinally();
- }