| /******************************************************************************* |
| * Copyright (c) 2015 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.trace; |
| |
| import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.isUnaryInteger; |
| |
| import org.antlr.runtime.tree.CommonTree; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ICommonTreeParser; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ParseException; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.UnaryIntegerParser; |
| |
| /** |
| * A version number parser looking up major/minor |
| * |
| * @author Matthew Khouzam |
| * |
| */ |
| public final class VersionNumberParser implements ICommonTreeParser { |
| |
| private static final String ERROR = "Invalid value for major/minor"; //$NON-NLS-1$ |
| |
| /** |
| * The instance |
| */ |
| public static final VersionNumberParser INSTANCE = new VersionNumberParser(); |
| |
| private VersionNumberParser() { |
| } |
| |
| /** |
| * Parse a version and get the major or minor value |
| * |
| * @param tree |
| * the AST node of the version |
| * @param unused |
| * unused |
| * @return the version value as a {@link Long} |
| * @throws ParseException |
| * the AST is malformed |
| */ |
| @Override |
| public Long parse(CommonTree tree, ICommonTreeParserParameter unused) throws ParseException { |
| |
| CommonTree firstChild = (CommonTree) tree.getChild(0); |
| |
| if (isUnaryInteger(firstChild)) { |
| if (tree.getChildCount() > 1) { |
| throw new ParseException(ERROR); |
| } |
| long version = UnaryIntegerParser.INSTANCE.parse(firstChild, null); |
| if (version < 0) { |
| throw new ParseException(ERROR); |
| } |
| return version; |
| } |
| throw new ParseException(ERROR); |
| } |
| |
| } |