// load color scale from json
public void fromJSON(final String json) throws ColorScaleException {
try {
final ObjectMapper mapper = new ObjectMapper();
final Map<String, Object> colorScaleMap = mapper.readValue(json, Map.class);
final String scalingStr = (String) colorScaleMap.get("Scaling");
if (scalingStr != null) {
scaling = Scaling.valueOf(scalingStr);
}
final String reliefShadingStr = (String) colorScaleMap.get("ReliefShading");
reliefShading = ("1").equals(reliefShadingStr) || ("true").equalsIgnoreCase(reliefShadingStr);
final String interpolateStr = (String) colorScaleMap.get("Interpolate");
interpolate =
(interpolateStr == null)
|| interpolateStr.isEmpty()
|| ("1").equals(interpolateStr)
|| ("true").equalsIgnoreCase(interpolateStr);
final String forceStr = (String) colorScaleMap.get("ForceValuesIntoRange");
forceValuesIntoRange = ("1").equals(forceStr) || ("true").equalsIgnoreCase(forceStr);
final Map<String, String> nullColorMap = (Map<String, String>) colorScaleMap.get("NullColor");
final String nullColorStr = nullColorMap.get("color");
if (nullColorStr != null) {
parseColor(nullColorStr, nullColorMap.get("opacity"), nullColor);
}
final ArrayList<Map<String, String>> colorsList =
(ArrayList<Map<String, String>>) colorScaleMap.get("Colors");
if (colorsList != null) {
for (final Map<String, String> color : colorsList) {
final int[] colorArr = new int[4];
final String colorStr = color.get("color");
final String valueStr = color.get("value");
final Double value = Double.valueOf(valueStr);
if (colorStr != null) {
parseColor(colorStr, color.get("opacity"), colorArr);
put(value, colorArr);
}
}
}
} catch (final Exception e) {
throw new BadJSONException(e);
}
}
/**
* Method is responsible for generating a color scale from hard coded values. It should be called
* when there is no input default color scale.
*/
public void setDefaultValues() {
clear();
setScaling(ColorScale.Scaling.MinMax);
put(0.0, new Color(0, 0, 0, 0));
put(1e-12, new Color(255, 255, 255, 128));
put(0.1, new Color(247, 252, 253));
put(0.2, new Color(229, 245, 249));
put(0.3, new Color(204, 236, 230));
put(0.4, new Color(153, 216, 201));
put(0.5, new Color(102, 194, 164));
put(0.6, new Color(65, 174, 118));
put(0.7, new Color(35, 139, 69));
put(0.8, new Color(0, 109, 44));
put(0.9, new Color(0, 68, 27));
put(1.0, new Color(0, 0, 0));
setInterpolate(true);
setForceValuesIntoRange(false);
}
/**
* Method is responsible for generating a color scale from hard coded values. It should be called
* when there is no input default color scale.
*/
public void setDefaultGrayScaleValues() {
clear();
setScaling(ColorScale.Scaling.MinMax);
put(0.0, new Color(0, 0, 0));
put(0.1, new Color(26, 26, 26));
put(0.2, new Color(52, 52, 52));
put(0.3, new Color(77, 77, 77));
put(0.4, new Color(102, 102, 102));
put(0.5, new Color(128, 128, 128));
put(0.6, new Color(154, 154, 154));
put(0.7, new Color(179, 179, 179));
put(0.8, new Color(205, 205, 205));
put(0.9, new Color(230, 230, 230));
put(1.0, new Color(255, 255, 255));
setInterpolate(true);
setForceValuesIntoRange(false);
}
public void put(final double key, final int[] c) {
put(new Double(key), new Color(c[0], c[1], c[2], c[3]));
cache = null;
}
public void put(final double key, final int r, final int g, final int b, final int a) {
put(new Double(key), new Color(r, g, b, a));
cache = null;
}
public void put(final double key, final Color c) {
put(new Double(key), c);
cache = null;
}
public void fromXML(final Document doc) throws ColorScaleException {
try {
clear();
final XPath xpath = XmlUtils.createXPath();
name = xpath.evaluate("/ColorMap/@name", doc);
final Node nodeTitle = (Node) xpath.evaluate("/ColorMap/Title", doc, XPathConstants.NODE);
if (nodeTitle != null) {
title = xpath.evaluate("text()", nodeTitle);
}
final Node nodeDesc =
(Node) xpath.evaluate("/ColorMap/Description", doc, XPathConstants.NODE);
if (nodeDesc != null) {
description = xpath.evaluate("text()", nodeDesc);
}
scaling = Scaling.valueOf(xpath.evaluate("/ColorMap/Scaling/text()", doc));
final String reliefShadingStr =
xpath.evaluate("/ColorMap/ReliefShading/text()", doc).toLowerCase();
reliefShading = reliefShadingStr.equals("1") || reliefShadingStr.equals("true");
final String interpolateStr =
xpath.evaluate("/ColorMap/Interpolate/text()", doc).toLowerCase();
interpolate =
interpolateStr.isEmpty() || (interpolateStr.equals("1") || interpolateStr.equals("true"));
final String forceStr =
xpath.evaluate("/ColorMap/ForceValuesIntoRange/text()", doc).toLowerCase();
forceValuesIntoRange = (forceStr.equals("1") || forceStr.equals("true"));
final Node nullColorNode =
(Node) xpath.evaluate("/ColorMap/NullColor", doc, XPathConstants.NODE);
if (nullColorNode != null) {
final String colorStr = xpath.evaluate("@color", nullColorNode);
final String opacityStr = xpath.evaluate("@opacity", nullColorNode);
parseColor(colorStr, opacityStr, nullColor);
}
final int[] color = new int[4];
final XPathExpression expr = xpath.compile("/ColorMap/Color");
final NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
for (int i = 0; i < nodes.getLength(); i++) {
final Node node = nodes.item(i);
final String valueStr = xpath.evaluate("@value", node);
final String colorStr = xpath.evaluate("@color", node);
final String opacityStr = xpath.evaluate("@opacity", node);
if (valueStr.isEmpty()) {
throw new IOException(
"Error parsing XML: A value must be specified for a color element.");
}
final double value = Double.valueOf(valueStr);
parseColor(colorStr, opacityStr, color);
put(value, color);
}
cache = null;
} catch (final Exception e) {
throw new BadXMLException(e);
}
}
