/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file 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.jboss.modcluster.container.catalina;

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.catalina.Container;
import org.jboss.modcluster.container.Context;
import org.jboss.modcluster.container.Engine;
import org.jboss.modcluster.container.Host;

/**
 * {@link Host} implementation that wraps a {@link org.apache.catalina.Host}.
 * 
 * @author Paul Ferraro
 */
public class CatalinaHost implements Host {
    protected final CatalinaFactoryRegistry registry;
    protected final org.apache.catalina.Host host;
    protected final Engine engine;

    /**
     * Constructs a new CatalinaHost wrapping the specified catalina host.
     * 
     * @param host a catalina host
     * @param engine the parent container
     */
    public CatalinaHost(CatalinaFactoryRegistry registry, org.apache.catalina.Host host, Engine engine) {
        this.registry = registry;
        this.host = host;
        this.engine = engine;
    }

    @Override
    public Set<String> getAliases() {
        String name = this.host.getName();
        String[] aliases = this.host.findAliases();

        if (aliases.length == 0) {
            return Collections.singleton(name);
        }

        Set<String> hosts = new LinkedHashSet<String>();

        hosts.add(name);

        for (String alias : aliases) {
            hosts.add(alias);
        }

        return hosts;
    }

    @Override
    public Iterable<Context> getContexts() {
        final Iterator<Container> children = Arrays.asList(this.host.findChildren()).iterator();

        final Iterator<Context> contexts = new Iterator<Context>() {
            @Override
            public boolean hasNext() {
                return children.hasNext();
            }

            @Override
            public Context next() {
                return CatalinaHost.this.registry.getContextFactory().createContext((org.apache.catalina.Context) children.next(), CatalinaHost.this);
            }

            @Override
            public void remove() {
                children.remove();
            }
        };

        return new Iterable<Context>() {
            @Override
            public Iterator<Context> iterator() {
                return contexts;
            }
        };
    }

    @Override
    public Engine getEngine() {
        return this.engine;
    }

    @Override
    public String getName() {
        return this.host.getName();
    }

    @Override
    public Context findContext(String path) {
        org.apache.catalina.Context context = (org.apache.catalina.Context) this.host.findChild(path);

        return (context != null) ? CatalinaHost.this.registry.getContextFactory().createContext(context, this) : null;
    }

    @Override
    public boolean equals(Object object) {
        if ((object == null) || !(object instanceof CatalinaHost)) return false;

        CatalinaHost host = (CatalinaHost) object;

        return this.host == host.host;
    }

    @Override
    public int hashCode() {
        return this.host.hashCode();
    }

    @Override
    public String toString() {
        return this.host.getName();
    }
}
