Changed MustacheContextException -> MustacheException.Context.

Also made data into final fields. I don't like unnecessary getters.

src/main/java/com/samskivert/mustache/Mustache.java

@@ -609,8 +609,8 @@ public class Mustache
         @Override public void execute (Template tmpl, Template.Context ctx, Writer out)  {
             Object value = tmpl.getValueOrDefault(ctx, _name, _line);
             if (value == null) {
-                throw new MustacheContextException(
-                    "No key, method or field with name '" + _name + "' on line " + _line, _name, _line);
+                throw new MustacheException.Context("No key, method or field with name '" + _name +
+                                                    "' on line " + _line, _name, _line);
             }
             String text = String.valueOf(value);
             write(out, _escapeHTML ? escapeHTML(text) : text);

src/main/java/com/samskivert/mustache/MustacheContextException.java

@@ -1,32 +0,0 @@
-package com.samskivert.mustache;
-
-/**
- * An exception thrown if we encounter an unsatisfactory context error (e.g. a missing variable) while executing a template.
- */
-public class MustacheContextException extends MustacheException {
-    private String key;
-    private int lineNo;
-
-    public MustacheContextException (String message, String key, int lineNo) {
-        super(message);
-        this.key = key;
-        this.lineNo = lineNo;
-    }
-
-    public MustacheContextException (String message, String key, int lineNo, Throwable cause) {
-        super(message, cause);
-        this.key = key;
-        this.lineNo = lineNo;
-    }
-
-    /** Get key (e.g. variable or section name) that caused the problem. */
-    public String getKey() {
-        return key;
-    }
-
-    /** Line number where the problem occurred. */
-    public int getLineNo() {
-        return lineNo;
-    }
-
-}

src/main/java/com/samskivert/mustache/MustacheException.java

@@ -9,6 +9,27 @@ package com.samskivert.mustache;
  */
 public class MustacheException extends RuntimeException
 {
+    /** An exception thrown if we encounter a context error (e.g. a missing variable) while
+     * compiling or executing a template. */
+    public static class Context extends MustacheException {
+        /** The key that caused the problem. */
+        public final String key;
+
+        /** The line number of the template on which the problem occurred. */
+        public final int lineNo;
+
+        public Context (String message, String key, int lineNo) {
+            super(message);
+            this.key = key;
+            this.lineNo = lineNo;
+        }
+
+        public Context (String message, String key, int lineNo, Throwable cause) {
+            super(message, cause);
+            this.key = key;
+            this.lineNo = lineNo;
+        }
+    }
 
     public MustacheException (String message) {
         super(message);

src/main/java/com/samskivert/mustache/Template.java

@@ -134,7 +134,7 @@ public class Template
                 Object data = getValue(ctx, comps[0].intern(), line, missingIsNull);
                 for (int ii = 1; ii < comps.length; ii++) {
                     if (data == NO_FETCHER_FOUND) {
-                        if (!missingIsNull) throw new MustacheContextException(
+                        if (!missingIsNull) throw new MustacheException.Context(
                             "Missing context for compound variable '" + name + "' on line " + line +
                             ". '" + comps[ii - 1] + "' was not found.", name, line);
                         return null;
@@ -231,7 +231,7 @@ public class Template
             _fcache.put(key, fetcher);
             return value;
         } catch (Exception e) {
-            throw new MustacheContextException(
+            throw new MustacheException.Context(
                 "Failure fetching variable '" + name + "' on line " + line, name, line, e);
         }
     }
@@ -240,7 +240,7 @@ public class Template
     {
         if (value == NO_FETCHER_FOUND) {
             if (missingIsNull) return null;
-            throw new MustacheContextException(
+            throw new MustacheException.Context(
                 "No method or field with name '" + name + "' on line " + line, name, line);
         } else {
             return value;