Java WWUtil.isEmpty方法代码示例

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
protected LayerInfo createLayerInfo(WMSCapabilities caps, WMSLayerCapabilities layerCaps, WMSLayerStyle style)
{
    // Create the layer info specified by the layer's capabilities entry and the selected style.

    LayerInfo linfo = new LayerInfo();
    linfo.caps = caps;
    linfo.params = new AVListImpl();
    linfo.params.setValue(AVKey.LAYER_NAMES, layerCaps.getName());
    if (style != null)
        linfo.params.setValue(AVKey.STYLE_NAMES, style.getName());
    String abs = layerCaps.getLayerAbstract();
    if (!WWUtil.isEmpty(abs))
        linfo.params.setValue(AVKey.LAYER_ABSTRACT, abs);

    linfo.params.setValue(AVKey.DISPLAY_NAME, makeTitle(caps, linfo));

    return linfo;
}
 

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
protected static String formName(Object kmlSource, KMLRoot kmlRoot)
{
    KMLAbstractFeature rootFeature = kmlRoot.getFeature();

    if (rootFeature != null && !WWUtil.isEmpty(rootFeature.getName()))
        return rootFeature.getName();

    if (kmlSource instanceof File)
        return ((File) kmlSource).getName();

    if (kmlSource instanceof URL)
        return ((URL) kmlSource).getPath();

    if (kmlSource instanceof String && WWIO.makeURL((String) kmlSource) != null)
        return WWIO.makeURL((String) kmlSource).getPath();

    return "KML Layer";
}
 

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
/**
 * Append Property elements to a context element.
 * 
 * @param context
 *            the context on which to append new element(s)
 * @param properties
 *            AVList with properties to append.
 */
public static void appendProperties(Element context, AVList properties) {
	if (null == context || properties == null) return;

	StringBuilder sb = new StringBuilder();

	// add properties
	for (Map.Entry<String, Object> entry : properties.getEntries()) {
		sb.setLength(0);
		String key = entry.getKey();
		sb.append(properties.getValue(key));
		String value = sb.toString();
		if (WWUtil.isEmpty(key) || WWUtil.isEmpty(value)) continue;

		Element property = WWXML.appendElement(context, "Property");
		WWXML.setTextAttribute(property, "name", key);
		WWXML.setTextAttribute(property, "value", value);
	}
}
 

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
private LayerInfo createLayerInfo(WMSCapabilities caps, WMSLayerCapabilities layerCaps, WMSLayerStyle style) {
    // Create the layer info specified by the layer's capabilities entry and the selected style.

    LayerInfo linfo = new LayerInfo();
    linfo.caps = caps;
    linfo.params = new AVListImpl();
    linfo.params.setValue(AVKey.LAYER_NAMES, layerCaps.getName());
    if (style != null)
        linfo.params.setValue(AVKey.STYLE_NAMES, style.getName());
    String abs = layerCaps.getLayerAbstract();
    if (!WWUtil.isEmpty(abs))
        linfo.params.setValue(AVKey.LAYER_ABSTRACT, abs);

    linfo.params.setValue(AVKey.DISPLAY_NAME, makeTitle(caps, linfo));

    return linfo;
}
 

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
private void drawLabel(	final DrawContext dc,
						final LabelAttributes attr,
						double x,
						double y,
						final String halign,
						final String valign) {

	final String text = attr.getText();
	if (WWUtil.isEmpty(text)) {
		return;
	}

	Font font = attr.getFont();
	if (font == null) {
		font = DEFAULT_FONT;
	}

	Color color = DEFAULT_COLOR;
	if (attr.getColor() != null) {
		color = attr.getColor();
	}

	final Point location = this.getScreenLocation(dc);
	if (location != null) {
		x += location.getX() - _legendImage.getImageWidth(dc) / 2;
		y += location.getY() - _legendImage.getImageHeight(dc) / 2;
	}

	final Point2D offset = attr.getOffset();
	if (offset != null) {
		x += offset.getX();
		y += offset.getY();
	}

	final TextRenderer tr = OGLTextRenderer.getOrCreateTextRenderer(dc.getTextRendererCache(), font);
	if (tr == null) {
		return;
	}

	final Rectangle2D bounds = tr.getBounds(text);
	if (bounds != null) {
		if (AVKey.CENTER.equals(halign)) {
			x += -(bounds.getWidth() / 2d);
		}
		if (AVKey.RIGHT.equals(halign)) {
			x += -bounds.getWidth();
		}

		if (AVKey.CENTER.equals(valign)) {
			y += (bounds.getHeight() + bounds.getY());
		}
		if (AVKey.TOP.equals(valign)) {
			y += bounds.getHeight();
		}
	}

	final Rectangle viewport = dc.getView().getViewport();
	tr.beginRendering(viewport.width, viewport.height);
	try {
		final double yInGLCoords = viewport.height - y - 1;

		// Draw the text outline, in a contrasting color.
		tr.setColor(WWUtil.computeContrastingColor(color));
		tr.draw(text, (int) x + 1, (int) yInGLCoords - 1);

		// Draw the text over its outline, in the specified color.
		tr.setColor(color);
		tr.draw(text, (int) x, (int) yInGLCoords);

	} finally {
		tr.endRendering();
	}
}
 

import gov.nasa.worldwind.util.WWUtil; //导入方法依赖的package包/类
protected String validateDataSource(Object source, AVList params) {
	// TiledImageProducer does not accept null data sources.
	if (source == null) return Logging.getMessage("nullValue.SourceIsNull");

	// TiledRasterProducer accepts BufferedImageRaster as a data source. If the data source is a DataRaster, then
	// check that it's a BufferedImageRaster.
	// TODO garakl DataSource as a source? What about GDALDataRaster
	if (source instanceof DataRaster) {
		DataRaster raster = (DataRaster) source;

		if (!(raster instanceof BufferedImageRaster)) return Logging.getMessage("TiledRasterProducer.UnrecognizedDataSource", raster);

		String s = this.validateDataSourceParams(raster, String.valueOf(raster));
		if (s != null) return s;
	}
	// For any other data source, attempt to find a reader for the data source. If the reader knows the data
	// source's raster type, then check that it's a color image or a monochromatic image.
	else {
		params = (params == null) ? new AVListImpl() : params;

		DataRasterReader reader = this.getReaderFactory().findReaderFor(source, params, this.getDataRasterReaders());

		if (reader == null) {
			return Logging.getMessage("TiledRasterProducer.UnrecognizedDataSource", source);
		} else if (reader instanceof RPFRasterReader) {
			// RPF rasters are geo-referenced, so we may skip the validation
			return null;
		}

		String errMsg = this.validateDataSourceParams(params, String.valueOf(source));
		if (!WWUtil.isEmpty(errMsg)) {
			try {
				reader.readMetadata(source, params);
				errMsg = this.validateDataSourceParams(params, String.valueOf(source));
			} catch (IOException e) {
				return Logging.getMessage("TiledRasterProducer.ExceptionWhileReading", source, e.getMessage());
			}
		}

		if (!WWUtil.isEmpty(errMsg)) return errMsg;
	}

	return null;
}