/**
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* Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
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* <p>
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.apache.org/licenses/LICENSE-2.0
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package tech.aiflowy.common.web.devlog;
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import java.lang.reflect.Method;
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/**
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* 参考 https://github.com/apache/dubbo/blob/master/dubbo-common/src/main/java/org/apache/dubbo/common/utils/ReflectUtils.java
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*/
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public final class DevLogUtil {
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/**
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* void(V).
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*/
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public static final char JVM_VOID = 'V';
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/**
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* boolean(Z).
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*/
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public static final char JVM_BOOLEAN = 'Z';
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/**
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* byte(B).
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*/
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public static final char JVM_BYTE = 'B';
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/**
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* char(C).
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*/
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public static final char JVM_CHAR = 'C';
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/**
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* double(D).
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*/
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public static final char JVM_DOUBLE = 'D';
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/**
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* float(F).
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*/
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public static final char JVM_FLOAT = 'F';
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/**
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* int(I).
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*/
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public static final char JVM_INT = 'I';
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/**
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* long(J).
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*/
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public static final char JVM_LONG = 'J';
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/**
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* short(S).
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*/
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public static final char JVM_SHORT = 'S';
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/**
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* get class desc.
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* boolean[].class => "[Z"
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* Object.class => "Ljava/lang/Object;"
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*
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* @param c class.
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* @return desc.
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*/
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public static String getDesc(Class<?> c) {
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StringBuilder ret = new StringBuilder();
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while (c.isArray()) {
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ret.append('[');
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c = c.getComponentType();
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}
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if (c.isPrimitive()) {
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String t = c.getName();
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if ("void".equals(t)) {
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ret.append(JVM_VOID);
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} else if ("boolean".equals(t)) {
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ret.append(JVM_BOOLEAN);
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} else if ("byte".equals(t)) {
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ret.append(JVM_BYTE);
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} else if ("char".equals(t)) {
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ret.append(JVM_CHAR);
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} else if ("double".equals(t)) {
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ret.append(JVM_DOUBLE);
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} else if ("float".equals(t)) {
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ret.append(JVM_FLOAT);
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} else if ("int".equals(t)) {
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ret.append(JVM_INT);
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} else if ("long".equals(t)) {
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ret.append(JVM_LONG);
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} else if ("short".equals(t)) {
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ret.append(JVM_SHORT);
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}
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} else {
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ret.append('L');
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ret.append(c.getName().replace('.', '/'));
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ret.append(';');
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}
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return ret.toString();
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}
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/**
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* get method desc.
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* "(I)I", "()V", "(Ljava/lang/String;Z)V"
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*
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* @param m method.
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* @return desc.
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*/
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public static String getMethodDescWithoutName(Method m) {
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StringBuilder ret = new StringBuilder();
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ret.append('(');
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Class<?>[] parameterTypes = m.getParameterTypes();
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for (int i = 0; i < parameterTypes.length; i++) {
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ret.append(getDesc(parameterTypes[i]));
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}
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ret.append(')').append(getDesc(m.getReturnType()));
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return ret.toString();
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}
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}
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