com.springsource.greenhouse.utils.Location.java Source code

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Here is the source code for com.springsource.greenhouse.utils.Location.java

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/*
 * Copyright 2010 the original author or authors.
 *
 * 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 com.springsource.greenhouse.utils;

import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;

import com.springsource.greenhouse.home.UserLocationHandlerInterceptor;

/**
 * A geo-location that can be plotted on a map.
 * @author Keith Donald
 */
public final class Location {

    private final Double latitude;

    private final Double longitude;

    public Location(Double latitude, Double longitude) {
        this.latitude = latitude;
        this.longitude = longitude;
    }

    /**
     * The lat value.
     */
    public Double getLatitude() {
        return latitude;
    }

    /**
     * The long value.
     */
    public Double getLongitude() {
        return longitude;
    }

    public int hashCode() {
        return latitude.hashCode() + longitude.hashCode() * 29;
    }

    public boolean equals(Object o) {
        if (!(o instanceof Location)) {
            return false;
        }
        Location l = (Location) o;
        return latitude.equals(l.latitude) && l.longitude.equals(l.longitude);
    }

    /**
     * Get the location of the user associated with the current request, if resolvable.
     */
    public static Location getCurrentLocation() {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        return attributes != null
                ? (Location) attributes.getAttribute(UserLocationHandlerInterceptor.USER_LOCATION_ATTRIBUTE,
                        RequestAttributes.SCOPE_REQUEST)
                : null;
    }

}