| /******************************************************************************* |
| * 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.string; |
| |
| import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.concatenateUnaryStrings; |
| import static org.eclipse.tracecompass.internal.ctf.core.event.metadata.tsdl.TsdlUtils.isUnaryString; |
| |
| import org.antlr.runtime.tree.CommonTree; |
| import org.eclipse.tracecompass.ctf.core.event.types.Encoding; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ICommonTreeParser; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.MetadataStrings; |
| import org.eclipse.tracecompass.internal.ctf.core.event.metadata.ParseException; |
| |
| /** |
| * Parse the encoding field. This can be "ascii", "utf8" or "none" |
| * |
| * @author Matthew Khouzam |
| */ |
| public final class EncodingParser implements ICommonTreeParser { |
| |
| /** |
| * Instance |
| */ |
| public static final EncodingParser INSTANCE = new EncodingParser(); |
| |
| private EncodingParser() { } |
| |
| private static final String INVALID_VALUE_FOR_ENCODING = "Invalid value for encoding"; //$NON-NLS-1$ |
| |
| /** |
| * Gets the value of an "encoding" integer attribute. |
| * |
| * @return The "encoding" value. |
| * @throws ParseException |
| * for unknown or malformed encoding |
| */ |
| @Override |
| public Encoding parse(CommonTree tree, ICommonTreeParserParameter param) throws ParseException { |
| CommonTree firstChild = (CommonTree) tree.getChild(0); |
| |
| if (isUnaryString(firstChild)) { |
| String strval = concatenateUnaryStrings(tree.getChildren()); |
| |
| if (strval.equals(MetadataStrings.UTF8)) { |
| return Encoding.UTF8; |
| } else if (strval.equals(MetadataStrings.ASCII)) { |
| return Encoding.ASCII; |
| } else if (strval.equals(MetadataStrings.NONE)) { |
| return Encoding.NONE; |
| } else { |
| throw new ParseException(INVALID_VALUE_FOR_ENCODING); |
| } |
| } |
| throw new ParseException(INVALID_VALUE_FOR_ENCODING); |
| |
| } |
| |
| } |