/*
 * JBoss, Home of Professional Open Source
 * Copyright ${year}, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.richfaces.taglib;

import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.MetaRule;
import javax.faces.view.facelets.MetaRuleset;
import javax.faces.view.facelets.Metadata;
import javax.faces.view.facelets.MetadataTarget;
import javax.faces.view.facelets.TagAttribute;

import org.richfaces.component.AbstractDataTable;
import org.richfaces.view.facelets.RowKeyConverterRule;

/**
 * @author Anton Belevich
 *
 */
public class DataTableHandler extends ComponentHandler {
    public DataTableHandler(ComponentConfig config) {
        super(config);
    }

    protected MetaRuleset createMetaRuleset(Class type) {
        MetaRuleset m = super.createMetaRuleset(type);
        m.addRule(SortingFilteringRule.INSTANCE);
        m.addRule(RowKeyConverterRule.INSTANCE);
        return m;
    }

    static class SortingFilteringRule extends MetaRule {
        private static final SortingFilteringRule INSTANCE = new SortingFilteringRule();

        public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta) {
            if (meta.isTargetInstanceOf(AbstractDataTable.class)) {

                if ("sortingListener".equals(name)) {
                    return new SortingListenerMapper(attribute);
                }

                if ("filteringListener".equals(name)) {
                    return new FilteringListenerMapper(attribute);
                }
            }

            return null;
        }
    }

    static final class SortingListenerMapper extends Metadata {
        private static final Class[] SIGNATURE = new Class[] { org.richfaces.event.SortingEvent.class };
        private final TagAttribute attribute;

        public SortingListenerMapper(TagAttribute attribute) {
            this.attribute = attribute;
        }

        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((AbstractDataTable) instance).addSortingListener(new MethodExpressionSortingListener(this.attribute
                .getMethodExpression(ctx, null, SIGNATURE)));
        }
    }

    static final class FilteringListenerMapper extends Metadata {
        private static final Class[] SIGNATURE = new Class[] { org.richfaces.event.FilteringEvent.class };
        private final TagAttribute attribute;

        public FilteringListenerMapper(TagAttribute attribute) {
            this.attribute = attribute;
        }

        public void applyMetadata(FaceletContext ctx, Object instance) {
            ((AbstractDataTable) instance).addFilteringListener(new MethodExpressionFilteringListener(this.attribute
                .getMethodExpression(ctx, null, SIGNATURE)));
        }
    }
}