| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.olingo.server.core.uri.testutil; |
| |
| import org.antlr.v4.runtime.Token; |
| import org.antlr.v4.runtime.misc.NotNull; |
| import org.antlr.v4.runtime.misc.Nullable; |
| import org.antlr.v4.runtime.misc.Utils; |
| import org.antlr.v4.runtime.tree.ErrorNode; |
| import org.antlr.v4.runtime.tree.RuleNode; |
| import org.antlr.v4.runtime.tree.TerminalNode; |
| import org.antlr.v4.runtime.tree.Tree; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| public class ParseTreeToText { |
| |
| public static String getTreeAsText(final Tree contextTree, final String[] ruleNames) { |
| return toStringTree(contextTree, Arrays.asList(ruleNames)); |
| } |
| |
| private static String toStringTree(final Tree t, @Nullable final List<String> ruleNames) { |
| |
| if (t.getChildCount() == 0) { |
| return Utils.escapeWhitespace(getNodeText(t, ruleNames), false); |
| } |
| |
| StringBuilder buf = new StringBuilder(); |
| String s = Utils.escapeWhitespace(getNodeText(t, ruleNames), false); |
| buf.append(s); |
| buf.append("("); |
| |
| for (int i = 0; i < t.getChildCount(); i++) { |
| if (i > 0) { |
| buf.append(' '); |
| } |
| buf.append(toStringTree(t.getChild(i), ruleNames)); |
| } |
| buf.append(")"); |
| return buf.toString(); |
| } |
| |
| private static String getNodeText(@NotNull final Tree t, @Nullable final List<String> ruleNames) { |
| if (ruleNames != null) { |
| if (t instanceof RuleNode) { |
| int ruleIndex = ((RuleNode) t).getRuleContext().getRuleIndex(); |
| return ruleNames.get(ruleIndex); |
| } else if (t instanceof ErrorNode) { |
| return t.toString(); |
| } else if (t instanceof TerminalNode) { |
| Token symbol = ((TerminalNode) t).getSymbol(); |
| if (symbol != null) { |
| String s = symbol.getText(); |
| return s; |
| } |
| } |
| } |
| // no recog for rule names |
| Object payload = t.getPayload(); |
| if (payload instanceof Token) { |
| return ((Token) payload).getText(); |
| } |
| return t.getPayload().toString(); |
| } |
| } |