TooltipResolver.java

package org.csstudio.sds.util;

import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.csstudio.sds.model.AbstractWidgetModel;
import org.csstudio.sds.model.WidgetProperty;

public class TooltipResolver {
	private static Pattern FIND_ALIAS_NAME_PATTERN = Pattern.compile("\\$\\{([^${}]+)\\}");

	/**
	 * The sign, which is before a parameter.
	 */
	public static final String START_SEPARATOR = "${";
	/**
	 * The sign, which is after a parameter.
	 */
	public static final String END_SEPARATOR = "}";

	public static String resolveToValue(String tooltipPattern, AbstractWidgetModel widget) {
		return resolve(tooltipPattern, widget.getProperties());
	}

	private static String resolve(String tooltipPattern, List<WidgetProperty> properties) {

		// Get a Matcher based on the target string.
		Matcher matcher = FIND_ALIAS_NAME_PATTERN.matcher(tooltipPattern);

		String s = tooltipPattern;

		// Find all the matches.
		while (matcher.find()) {
			String name = matcher.group(1);

			WidgetProperty property = findWidgetProperty(properties, name);

			String replacement = "--";

			if (property != null) {
				replacement = property.getTextForTooltip();
			}

			// we have to escape all $ chars to prevent exceptions during the
			// following replacments
			replacement = replacement.replace("$", "\\$");

			try {
				s = s.replaceAll("\\$\\{" + name + "\\}", replacement);
			} catch (Exception e) {
				System.out.println(e.toString());
			}
		}

		return s;
	}

	private static WidgetProperty findWidgetProperty(List<WidgetProperty> properties, String propertyNameOrDescription) {
		WidgetProperty result = null;

		for (WidgetProperty p : properties) {
			if (propertyNameOrDescription.equals(p.getId()) || propertyNameOrDescription.equals(p.getDescription())) {
				result = p;
			}
		}

		return result;
	}

}