| package org.apache.cassandra; |
| /* |
| * |
| * 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. |
| * |
| */ |
| |
| |
| import org.junit.Ignore; |
| import org.junit.runners.model.FrameworkMethod; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.LineNumberReader; |
| import java.lang.reflect.Method; |
| import java.util.Comparator; |
| |
| public class MethodComparator<T> implements Comparator<T> |
| { |
| private static final char[] METHOD_SEPARATORS = {1, 7}; |
| |
| private MethodComparator() |
| { |
| } |
| |
| public static MethodComparator<FrameworkMethod> getFrameworkMethodComparatorForJUnit4() |
| { |
| return new MethodComparator<FrameworkMethod>(); |
| } |
| |
| @Override |
| public int compare(T o1, T o2) |
| { |
| final MethodPosition methodPosition1 = this.getIndexOfMethodPosition(o1); |
| final MethodPosition methodPosition2 = this.getIndexOfMethodPosition(o2); |
| return methodPosition1.compareTo(methodPosition2); |
| } |
| |
| private MethodPosition getIndexOfMethodPosition(final Object method) |
| { |
| if (method instanceof FrameworkMethod) |
| { |
| return this.getIndexOfMethodPosition((FrameworkMethod) method); |
| } |
| else if (method instanceof Method) |
| { |
| return this.getIndexOfMethodPosition((Method) method); |
| } |
| else |
| { |
| return new NullMethodPosition(); |
| } |
| } |
| |
| private MethodPosition getIndexOfMethodPosition(final FrameworkMethod frameworkMethod) |
| { |
| return getIndexOfMethodPosition(frameworkMethod.getMethod()); |
| } |
| |
| private MethodPosition getIndexOfMethodPosition(final Method method) |
| { |
| if (method.getAnnotation(Ignore.class) == null) |
| { |
| final Class<?> aClass = method.getDeclaringClass(); |
| return getIndexOfMethodPosition(aClass, method.getName()); |
| } |
| else |
| { |
| return new NullMethodPosition(); |
| } |
| } |
| |
| private MethodPosition getIndexOfMethodPosition(final Class<?> aClass, final String methodName) |
| { |
| MethodPosition methodPosition; |
| for (final char methodSeparator : METHOD_SEPARATORS) |
| { |
| methodPosition = getIndexOfMethodPosition(aClass, methodName, methodSeparator); |
| if (!(methodPosition instanceof NullMethodPosition)) |
| { |
| return methodPosition; |
| } |
| } |
| return new NullMethodPosition(); |
| } |
| |
| private MethodPosition getIndexOfMethodPosition(final Class<?> aClass, final String methodName, final char methodSeparator) |
| { |
| final InputStream inputStream = aClass.getResourceAsStream(aClass.getSimpleName() + ".class"); |
| final LineNumberReader lineNumberReader = new LineNumberReader(new InputStreamReader(inputStream)); |
| final String methodNameWithSeparator = methodName + methodSeparator; |
| try |
| { |
| try |
| { |
| String line; |
| while ((line = lineNumberReader.readLine()) != null) |
| { |
| if (line.contains(methodNameWithSeparator)) |
| { |
| return new MethodPosition(lineNumberReader.getLineNumber(), line.indexOf(methodNameWithSeparator)); |
| } |
| } |
| } |
| finally |
| { |
| lineNumberReader.close(); |
| } |
| } |
| catch (IOException e) |
| { |
| return new NullMethodPosition(); |
| } |
| return new NullMethodPosition(); |
| } |
| |
| private static class MethodPosition implements Comparable<MethodPosition> |
| { |
| private final Integer lineNumber; |
| private final Integer indexInLine; |
| |
| public MethodPosition(int lineNumber, int indexInLine) |
| { |
| this.lineNumber = lineNumber; |
| this.indexInLine = indexInLine; |
| } |
| |
| @Override |
| public int compareTo(MethodPosition o) |
| { |
| |
| // If line numbers are equal, then compare by indexes in this line. |
| if (this.lineNumber.equals(o.lineNumber)) |
| { |
| return this.indexInLine.compareTo(o.indexInLine); |
| } |
| else |
| { |
| return this.lineNumber.compareTo(o.lineNumber); |
| } |
| } |
| } |
| |
| private static class NullMethodPosition extends MethodPosition |
| { |
| public NullMethodPosition() |
| { |
| super(-1, -1); |
| } |
| } |
| } |