ctf/org.eclipse.tracecompass.ctf.core/src/org/eclipse/tracecompass/internal/ctf/core/event/metadata/tsdl/integer/ClockMapParser.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *******************************************************************************/
   9
  10 package org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.integer;
  11
  12 import org.antlr.runtime.tree.CommonTree;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ICommonTreeParser;
  15
  16 /**
  17  * A reference to the clock map in a given integer.
  18  *
  19  * @author Matthew Khouzam
  20  *
  21  */
  22 public class ClockMapParser implements ICommonTreeParser {
  23
  24     private static final @NonNull String EMPTY_STRING = ""; //$NON-NLS-1$
  25
  26     /**
  27      * Instance
  28      */
  29     public static final ClockMapParser INSTANCE = new ClockMapParser();
  30
  31     private ClockMapParser() {
  32     }
  33
  34     @Override
  35     public String parse(CommonTree tree, ICommonTreeParserParameter param) {
  36         String clock = tree.getChild(1).getChild(0).getChild(0).getText();
  37         return clock == null ? EMPTY_STRING : clock;
  38     }
  39
  40 }