DumpTree.jrag 1.74 KB
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import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;

// We have been careful to not import many types here because the imports are added for
// _ALL_ AST nodes and can cause collisions in the abstract grammar namespace.

aspect DumpTree {
	private static final String ASTNode.DUMP_TREE_INDENT = "  ";

	public String ASTNode.dumpTree() {
		ByteArrayOutputStream bytes = new ByteArrayOutputStream();
		dumpTree(new PrintStream(bytes));
		return bytes.toString();
	}

	public void ASTNode.dumpTree(PrintStream out) {
		dumpTree(out, "");
		out.flush();
	}

	public void ASTNode.dumpTree(PrintStream out, String indent) {
		out.print(indent + getClass().getSimpleName());
		out.println(getTokens());
		String childIndent = indent + DUMP_TREE_INDENT;
		for (ASTNode child : astChildren()) {
			if (child == null) {
				out.println(childIndent + "null");
			} else {
				child.dumpTree(out, childIndent);
			}
		}
	}

	public String ASTNode.getTokens() {
		java.util.TreeSet<java.lang.reflect.Method> methods = new java.util.TreeSet<>(
				new java.util.Comparator<java.lang.reflect.Method>() {
					public int compare(java.lang.reflect.Method m1, java.lang.reflect.Method m2) {
						return m1.getName().compareTo(m2.getName());
					}
				});

		methods.addAll(java.util.Arrays.asList(getClass().getMethods()));

		String result = "";
		for (java.lang.reflect.Method method : methods) {
			ASTNodeAnnotation.Token token = method.getAnnotation(ASTNodeAnnotation.Token.class);
			if (token != null) {
				try {
					result += String.format(" %s=\"%s\"", token.name(), method.invoke(this));
				} catch (IllegalAccessException ignored) {
				} catch (InvocationTargetException ignored) {
				}
			}
		}
		return result;
	}
}