org.opendaylight.yangtools.testutils.mockito.MethodExtensions Maven / Gradle / Ivy
/*
* Copyright (c) 2016 Red Hat, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.yangtools.testutils.mockito;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.lang.reflect.Type;
import java.util.regex.Pattern;
import org.checkerframework.checker.regex.qual.Regex;
/**
* Nicer shorter toString() for {@link Method} than it's default.
*
* Without modifiers, return type, FQN of class and exceptions; instead with parameter names (if javac -parameters).
*
* @author Michael Vorburger
*/
public final class MethodExtensions {
@Regex
private static final String PARAM_PATTERN_STR = "\\[\\]$";
private static final Pattern PARAM_PATTERN = Pattern.compile(PARAM_PATTERN_STR);
private MethodExtensions() {
}
public static String toString(final Method method) {
final StringBuilder sb = new StringBuilder();
sb.append(method.getName());
// copy/paste from java.lang.reflect.Executable.sharedToGenericString(int, boolean)
sb.append('(');
final Type[] params = method.getGenericParameterTypes();
// NEW
final Parameter[] parameters = method.getParameters();
for (int j = 0; j < params.length; j++) {
String param = params[j].getTypeName();
if (method.isVarArgs() && j == params.length - 1) {
// replace T[] with T...
param = PARAM_PATTERN.matcher(param).replaceFirst("...");
}
sb.append(param);
// NEW
if (parameters[j].isNamePresent()) {
sb.append(' ');
sb.append(parameters[j].getName());
}
// NEW END
if (j < params.length - 1) {
// NEW ", " instead of ','
sb.append(", ");
}
}
sb.append(')');
return sb.toString();
}
}