elevationtask.java

esri的ArcGIS Server超级学习模板程序（for java）

            if (result.getUnit() == 1) {
                // FEET
                m_elevationFeet = String.valueOf(result.getElevation());
                m_elevationMeters = String.valueOf(result.getElevation() * 0.3048);

                m_taskInfo.elevationCalculatedState();
            } else if (result.getUnit() == 2) {
                // METERS
                m_elevationMeters = String.valueOf(result.getElevation());
                m_elevationFeet = String.valueOf(result.getElevation() * 3.2808399);

                m_taskInfo.elevationCalculatedState();
            } else {
                m_elevationMeters = "";
                m_elevationFeet = "";

                m_taskInfo.elevationNotFoundErrorState();
            }

            LOG.debug("Elevation Feet: " + m_elevationFeet);
            LOG.debug("Elevation Meters: " + m_elevationMeters);
        } catch (ServicesException e) {
            LOG.warn("", e);
            m_taskInfo.generalErrorState(getErrorCode(e.getFaultString()));
        } catch (RemoteException e) {
            LOG.warn("", e);
            m_taskInfo.generalErrorState("REMOTE_EXCEPTION");
        } finally {
            reRender();
            LOG.debug("Exiting method");
        }
    }

    /**
     * Retrieves the error code from the error message.  The format
     * of the error message is "code:message".
     *
     * @param message        Error Message.
     * @return Error Code, or <code>null</code> if the message
     *                         is <code>null</code>.
     */
    private String getErrorCode(String message) {
        if (message == null) {
            return null;
        }

        String[] comps = message.split(":");
        String code = comps[1];
        code = code.trim();

        return code;
    }

    /**
     * Indicates if the elevation calculation has been executed.
     * If this method is invoked after
     * {@link #calculateElevation(TaskEvent)}
     * and it did not generate an error then <code>true</code>
     * will be returned.  Otherwise, <code>false</code> will be
     * returned.
     *
     * @return        Execution indicator.
     */
    public boolean getExecuted() {
        return m_executed;
    }

    /**
     * Returns the error message if the {@link #calculateElevation(TaskEvent)}
     * method generated an error during invocation.
     *
     * @return  Error Message.
     */
    public String getError() {
        return m_error;
    }

    /**
     * Sets the error message that was generated by the {@link #calculateElevation(TaskEvent)}
     * invocation.
     *
     * @param str                Error Message.
     */
    void setError(String str) {
        m_error = str;
    }

    /**
     * Indicates if an error occurred during the {@link #calculateElevation(TaskEvent)}
     * invocation.
     *
     * @return Error Indicator
     */
    public boolean getErrorOccurred() {
        return m_errorOccurred;
    }

    /**
     * Sets the indicator that an error has occurred.
     *
     * @param b                Desired indicator.
     */
    void setErrorOccurred(boolean b) {
        m_errorOccurred = b;
    }

    /**
     * Clears the current elevation results and associated marker (if drawn)
     * as well as any error messages.  This effectively puts the UI
     * in the start state.
     *
     * @param event
     */
    public void clear(TaskEvent event) {
        if (m_showMarker) {
            for (GraphicElement g : m_graphics) {
                event.getWebContext().getWebGraphics().removeGraphics(g);
            }

            event.getWebContext().refresh();
        }

        setElevationFeet("");
        setElevationMeters("");

        m_taskInfo.startState();

        reRender();
    }

    /**
     * Returns the elevation result in feet.  This method will
     * return <code>null</code> or a blank string if invoked
     * before the {@link #calculateElevation(TaskEvent)} method.
     *
     * @return  Elevation result in feet.
     */
    public String getElevationFeet() {
        return m_elevationFeet;
    }

    /**
     * Allows the Task Info bean or this object to set the
     * elevation result in feet.
     *
     * @param feet  Elevation result in feet.
     */
    void setElevationFeet(String feet) {
        m_elevationFeet = feet;
    }

    /**
     * Returns the elevation result in meters.  This method will
     * return <code>null</code> or a blank string if invoked
     * before the {@link #calculateElevation(TaskEvent)} method.
     *
     * @return  Elevation result in meters.
     */
    public String getElevationMeters() {
        return m_elevationMeters;
    }

    /**
     * Allows the Task Info bean or this object to set the
     * elevation result in meters.
     *
     * @param feet  Elevation result in meters.
     */
    void setElevationMeters(String meters) {
        m_elevationMeters = meters;
    }

    /**
     * Returns the X-coordinate of the location entered or
     * picked by the user.  This method will return null
     * or blank if invoked prior to {@link #calculateElevation(TaskEvent)}
     *
     * @return  X-coordinate
     */
    public String getX() {
        return m_x;
    }

    /**
     * Returns the Y-coordinate of the location entered or
     * picked by the user.  This method will return null
     * or blank if invoked prior to {@link #calculateElevation(TaskEvent)}
     *
     * @return  Y-coordinate
     */
    public String getY() {
        return m_y;
    }

    /**
     * Sets the X-coordinate of the location.  The X-coordinate
     * could have been typed into a text box by the user or chosen
     * by the user clicking a point on the map.
     *
     * @param x        X-coordinate.
     */
    public void setX(String x) {
        this.m_x = x;
    }

    /**
     * Sets the Y-coordinate of the location.  The Y-coordinate
     * could have been typed into a text box by the user or chosen
     * by the user clicking a point on the map.
     *
     * @param x        Y-coordinate.
     */
    public void setY(String y) {
        this.m_y = y;
    }

    /**
     * Indicates if a location on the map has been chosen.
     *
     * @return  Location Picked indicator.
     */
    public boolean getLocationPicked() {
        return m_locationPicked;
    }

    /**
     * Indicates that a marker should be shown for the location
     * that the user entered or chosen.
     *
     * @return Show Marker Indicator
     */
    public boolean getShowMarker() {
        return m_showMarker;
    }

    /**
     * Sets the Show Marker indicator.  This is set by a user
     * checking the Show Marker check box in the UI.
     *
     * @param showMarker                Show Marker indicator.
     */
    public void setShowMarker(boolean showMarker) {
        this.m_showMarker = showMarker;
    }

    /**
     * Returns the <code>TaskInfo</code> bean for this
     * task.
     *
     * @return Task Info bean
     */
    public SimpleTaskInfo getTaskInfo() {
        return m_taskInfo;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.adf.web.data.WebContextInitialize#destroy()
     */
    public void destroy() {
    }

    /*
     * (non-Javadoc)
     * @see com.esri.adf.web.data.WebContextInitialize#init(com.esri.adf.web.data.WebContext)
     */
    public void init(WebContext context) {
    }

    /**
     * This method has no implementation.
     */
    public void setTaskInfo(TaskInfo taskInfo) {
    }

    /**
     * Returns the proxy object to the Elevation Calculator
     * Web Service.
     *
     * @return        Web Service proxy object.
     */
    public ElevationCalculator getElevationCalculator() {
        return this.m_elevCalc;
    }

    /**
     * Sets the proxy object for the Elevation Calculator web
     * service.
     *
     * @param calc                Web Service proxy object.
     * @throws NullPointerException                Thrown if the <code>calc</code>
     *                                                                         argument is <code>null</code>.
     */
    public void setElevationCalculator(ElevationCalculator calc) {
        if (calc == null) {
            throw new NullPointerException();
        }

        this.m_elevCalc = calc;
    }
}