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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.arquillian.drone.impl;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.logging.Logger;
import org.jboss.arquillian.core.api.Injector;
import org.jboss.arquillian.core.api.Instance;
import org.jboss.arquillian.core.api.annotation.Inject;
import org.jboss.arquillian.drone.spi.DroneConfiguration;
import org.jboss.arquillian.drone.spi.DroneContext;
import org.jboss.arquillian.drone.spi.DronePoint;
import org.jboss.arquillian.drone.spi.DronePointContext;
import org.jboss.arquillian.drone.spi.FilterableResult;

/**
 * Default implementation of {@link DroneContext}
 *
 * @author Karel Piwko
 */
public class DroneContextImpl implements DroneContext {
    private static final Logger LOGGER = Logger.getLogger(DroneContextImpl.class.getName());

    private final Map, DronePointContext> droneContextMap;

    @Inject
    private Instance injector;

    @Deprecated
    private DroneConfiguration globalDroneConfiguration;

    public DroneContextImpl() {
        droneContextMap = new HashMap, DronePointContext>();
    }

    @Override
    public > C getGlobalDroneConfiguration(Class configurationClass) {
        return (C) globalDroneConfiguration;
    }

    @Override
    public void setGlobalDroneConfiguration(DroneConfiguration configuration) {
        globalDroneConfiguration = configuration;
    }

    @Override
    public  DronePointContext get(DronePoint dronePoint) {
        if (!droneContextMap.containsKey(dronePoint)) {
            DronePointContext pointContext = injector.get().inject(new DronePointContextImpl(dronePoint));
            droneContextMap.put(dronePoint, pointContext);
        }

        return (DronePointContext) droneContextMap.get(dronePoint);
    }

    @Override
    public  boolean contains(DronePoint dronePoint) {
        return droneContextMap.containsKey(dronePoint);
    }

    @Override
    public  void remove(DronePoint dronePoint) {
        // FIXME should we return the removed context?
        droneContextMap.remove(dronePoint);
    }

    @Override
    public  FilterableResult find(final Class droneClass) {
        Set> matchedDronePoints = new HashSet>();

        // We need to drop the generic type in order to be able to call 'accepts' on filters with 
        for (DronePoint dronePoint : droneContextMap.keySet()) {
            if (!dronePoint.conformsTo(droneClass)) {
                continue;
            }

            @SuppressWarnings("unchecked")
            DronePoint castDronePoint = (DronePoint) dronePoint;

            matchedDronePoints.add(castDronePoint);
        }

        return new FilterableResultImpl(this, matchedDronePoints);
    }
}