/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.tools.internal.ws.wsdl.framework;

import com.sun.tools.internal.ws.api.wsdl.TWSDLExtension;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * A helper class for extensible entities.
 *
 * @author WS Development Team
 */
public class ExtensibilityHelper {

    public ExtensibilityHelper() {
    }

    public void addExtension(TWSDLExtension e) {
        if (_extensions == null) {
            _extensions = new ArrayList();
        }
        _extensions.add(e);
    }

    public Iterable<TWSDLExtension> extensions() {
        if (_extensions == null) {
            return new ArrayList<TWSDLExtension>();
        } else {
            return _extensions;
        }
    }

    public void withAllSubEntitiesDo(EntityAction action) {
        if (_extensions != null) {
            for (Iterator iter = _extensions.iterator(); iter.hasNext();) {
                action.perform((Entity) iter.next());
            }
        }
    }

    public void accept(ExtensionVisitor visitor) throws Exception {
        if (_extensions != null) {
            for (Iterator iter = _extensions.iterator(); iter.hasNext();) {
                ((ExtensionImpl) iter.next()).accept(visitor);
            }
        }
    }

    private List<TWSDLExtension> _extensions;
}
