com.sun.faces.facelets.tag.jstl.core.CatchHandler Maven / Gradle / Ivy

/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.faces.facelets.tag.jstl.core;

import java.io.IOException;

import com.sun.faces.facelets.tag.TagHandlerImpl;

import jakarta.faces.component.UIComponent;
import jakarta.faces.view.facelets.FaceletContext;
import jakarta.faces.view.facelets.TagAttribute;
import jakarta.faces.view.facelets.TagConfig;

/**
 * @author Jacob Hookom
 */
public final class CatchHandler extends TagHandlerImpl {

    private final TagAttribute var;

    /**
     * @param config
     */
    public CatchHandler(TagConfig config) {
        super(config);
        var = getAttribute("var");
    }

    @Override
    public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
        try {
            nextHandler.apply(ctx, parent);
        } catch (Exception e) {
            if (var != null) {
                ctx.setAttribute(var.getValue(ctx), e);
            }
        }
    }

}