2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 - 2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.so.asdc.utils;
23 import java.util.Arrays;
25 import org.antlr.v4.runtime.Parser;
26 import org.antlr.v4.runtime.tree.ParseTree;
27 import org.antlr.v4.runtime.tree.ParseTreeWalker;
30 public class TreeUtils {
33 * Print the tree, splitting at appropriate points, instead of rendering a single long line.
38 public static String printTree(final ParseTree parseTree, final Parser parser){
39 final TreePrinterListener listener = new TreePrinterListener(Arrays.asList(parser.getRuleNames()));
40 ParseTreeWalker.DEFAULT.walk(listener, parseTree);
41 return listener.toString();
44 public static String normalizeWhiteSpace(String input){
45 return input.replaceAll("\\s+", " ").replaceAll("([^\\w])\\s+", "$1");