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/*
 * 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 jakarta.faces.view;

import java.beans.BeanInfo;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Stream;

import jakarta.faces.FacesWrapper;
import jakarta.faces.application.Resource;
import jakarta.faces.application.ViewVisitOption;
import jakarta.faces.component.UIComponent;
import jakarta.faces.component.UIViewRoot;
import jakarta.faces.context.FacesContext;

/**
 * 
 * Provides a simple implementation of {@link ViewDeclarationLanguage} that
 * can be subclassed by developers wishing to provide specialized behavior to an existing
 * {@link ViewDeclarationLanguage} instance. The default implementation of all methods is to call through to the wrapped
 * {@link ViewDeclarationLanguage} instance.
 * 
 *
 * 
 * Usage: extend this class and push the implementation being wrapped to the constructor and use {@link #getWrapped} to
 * access the instance being wrapped.
 * 
 *
 * @since 2.2
 */
public abstract class ViewDeclarationLanguageWrapper extends ViewDeclarationLanguage implements FacesWrapper {

    private ViewDeclarationLanguage wrapped;

    /**
     * @deprecated Use the other constructor taking the implementation being wrapped.
     */
    @Deprecated
    public ViewDeclarationLanguageWrapper() {

    }

    /**
     * 
     * If this view declaration language has been decorated, the implementation doing the decorating should push the
     * implementation being wrapped to this constructor. The {@link #getWrapped()} will then return the implementation being
     * wrapped.
     * 
     *
     * @param wrapped The implementation being wrapped.
     * @since 2.3
     */
    public ViewDeclarationLanguageWrapper(ViewDeclarationLanguage wrapped) {
        this.wrapped = wrapped;
    }

    @Override
    public ViewDeclarationLanguage getWrapped() {
        return wrapped;
    }

    // ----------------------------------------------- Methods from ViewDeclarationLanguage

    @Override
    public UIViewRoot restoreView(FacesContext context, String viewId) {
        return getWrapped().restoreView(context, viewId);
    }

    @Override
    public ViewMetadata getViewMetadata(FacesContext context, String viewId) {
        return getWrapped().getViewMetadata(context, viewId);
    }

    @Override
    public UIViewRoot createView(FacesContext context, String viewId) {
        return getWrapped().createView(context, viewId);
    }

    @Override
    public void buildView(FacesContext context, UIViewRoot root) throws IOException {
        getWrapped().buildView(context, root);
    }

    @Override
    public void renderView(FacesContext context, UIViewRoot view) throws IOException {
        getWrapped().renderView(context, view);
    }

    @Override
    public String getId() {
        return super.getId();
    }

    @Override
    public void retargetAttachedObjects(FacesContext context, UIComponent topLevelComponent, List handlers) {
        getWrapped().retargetAttachedObjects(context, topLevelComponent, handlers);
    }

    @Override
    public void retargetMethodExpressions(FacesContext context, UIComponent topLevelComponent) {
        getWrapped().retargetMethodExpressions(context, topLevelComponent);
    }

    @Override
    public boolean viewExists(FacesContext context, String viewId) {
        return getWrapped().viewExists(context, viewId);
    }

    @Override
    public Stream getViews(FacesContext context, String path, ViewVisitOption... options) {
        return getWrapped().getViews(context, path, options);
    }

    @Override
    public Stream getViews(FacesContext context, String path, int maxDepth, ViewVisitOption... options) {
        return getWrapped().getViews(context, path, maxDepth, options);
    }

    @Override
    public List calculateResourceLibraryContracts(FacesContext context, String viewId) {
        return getWrapped().calculateResourceLibraryContracts(context, viewId);
    }

    @Override
    public UIComponent createComponent(FacesContext context, String taglibURI, String tagName, Map attributes) {
        return getWrapped().createComponent(context, taglibURI, tagName, attributes);
    }

    @Override
    public BeanInfo getComponentMetadata(FacesContext context, Resource componentResource) {
        return getWrapped().getComponentMetadata(context, componentResource);
    }

    @Override
    public Resource getScriptComponentResource(FacesContext context, Resource componentResource) {
        return getWrapped().getScriptComponentResource(context, componentResource);
    }

    @Override
    public StateManagementStrategy getStateManagementStrategy(FacesContext context, String viewId) {
        return getWrapped().getStateManagementStrategy(context, viewId);
    }

}