Added getContentAsFont method

TULIP/src/lu/list/itis/dkd/tui/bootstrapping/BootstrappingUtils.java

@@ -35,8 +35,12 @@ import org.slf4j.LoggerFactory;
 
 import java.awt.Color;
 import java.awt.Font;
+import java.awt.GraphicsEnvironment;
 import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -129,6 +133,13 @@ public class BootstrappingUtils {
         SPECIAL_INTEGERS.put(POSITIVE_INFINITY, Integer.MAX_VALUE);
     }
 
+    private static final List<String> AVAILABLE_FONTS = new ArrayList<>();
+
+    static {
+        GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        AVAILABLE_FONTS.addAll(Arrays.asList(environment.getAvailableFontFamilyNames()));
+    }
+
     // ---------------------------------------------------------------------------
     // ***************************************************************************
     // * Primitives
@@ -343,24 +354,6 @@ public class BootstrappingUtils {
         }
         return value;
     }
-    // ---------------------------------------------------------------------------
-
-    private static Font getContentAsFont(Element rootElement, String childName, boolean optional, Font defaultFont, BootstrapContext context) throws BuildException {
-        Font font = defaultFont;
-
-        Element fontNode = (childName != null) ? rootElement.getChild(childName) : rootElement;
-        if (fontNode != null) {
-            String fontName = getContentAsString(fontNode, null, BootstrappingUtils.MANDATORY, null, context);
-            int fontSize = getContentAsInteger(fontNode, Externalization.SIZE_NODE, BootstrappingUtils.OPTIONAL, 12, context);
-            String fontStyle = getContentAsString(fontNode, Externalization.STYLE_NODE, BootstrappingUtils.OPTIONAL, PLAIN, context);
-            if (!FONT_STYLES.containsKey(fontStyle)) {
-                logAndThrowBuildException(new BuildException(StringUtils.build("Specified font style {} does match accepted values. Accepted values are {}!", fontStyle, FONT_STYLES.keySet())), rootElement, childName); //$NON-NLS-1$
-            }
-
-            font = new Font(fontName, FONT_STYLES.get(fontStyle.toLowerCase()), fontSize);
-        }
-        return font;
-    }
 
     // ---------------------------------------------------------------------------
     // ***************************************************************************
@@ -872,6 +865,38 @@ public class BootstrappingUtils {
         return colour;
     }
 
+    // ---------------------------------------------------------------------------
+    /**
+     * @param rootElement
+     * @param childName
+     * @param optional
+     * @param defaultFont
+     * @param context
+     * @return
+     * @throws BuildException
+     */
+    // ---------------------------------------------------------------------------
+
+    public static Font getContentAsFont(Element rootElement, String childName, boolean optional, Font defaultFont, BootstrapContext context) throws BuildException {
+        Font font = defaultFont;
+
+        Element fontNode = (childName != null) ? rootElement.getChild(childName) : rootElement;
+        if (fontNode != null) {
+            String fontName = getContentAsString(fontNode, null, BootstrappingUtils.MANDATORY, null, context);
+            int fontSize = getContentAsInteger(fontNode, Externalization.SIZE_NODE, BootstrappingUtils.OPTIONAL, 12, context);
+            String fontStyle = getContentAsString(fontNode, Externalization.STYLE_NODE, BootstrappingUtils.OPTIONAL, PLAIN, context);
+            if (!AVAILABLE_FONTS.contains(fontName)) {
+                logAndThrowBuildException(new BuildException(StringUtils.build("Specified font {} is unknown!", fontName)), rootElement, childName); //$NON-NLS-1$
+            }
+            if (!FONT_STYLES.containsKey(fontStyle)) {
+                logAndThrowBuildException(new BuildException(StringUtils.build("Specified font style {} does match accepted values. Accepted values are {}!", fontStyle, FONT_STYLES.keySet())), rootElement, childName); //$NON-NLS-1$
+            }
+
+            font = new Font(fontName, FONT_STYLES.get(fontStyle.toLowerCase()), fontSize);
+        }
+        return font;
+    }
+
     // ---------------------------------------------------------------------------
     /**
      * @param rootElement