Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2015 QAware GmbH, Munich, Germany * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package asm.de.qaware.campus.secpro.agent.impl; import org.objectweb.asm.*; /** * This class is the ASM dump of the original LoginServiceImpl. * <p> * Use gradlew asmifyOriginal */ public class AdminServiceImplDump implements Opcodes { public static byte[] dump() throws Exception { ClassWriter cw = new ClassWriter(0); FieldVisitor fv; MethodVisitor mv; AnnotationVisitor av0; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", null, "java/lang/Object", new String[] { "de/qaware/campus/secpro/agent/LoginService" }); // this here is the static LOGINS map { fv = cw.visitField(ACC_FINAL + ACC_STATIC, "LOGINS", "Ljava/util/Map;", "Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;", null); fv.visitEnd(); } // this here is the default constructor { mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } // this here is the canLogin method { mv = cw.visitMethod(ACC_PUBLIC, "canLogin", "(Ljava/lang/String;Ljava/lang/String;)Z", null, null); mv.visitCode(); mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitTypeInsn(CHECKCAST, "java/lang/String"); mv.visitVarInsn(ASTORE, 3); mv.visitVarInsn(ALOAD, 3); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals", "(Ljava/lang/Object;Ljava/lang/Object;)Z", false); mv.visitInsn(IRETURN); mv.visitMaxs(2, 4); mv.visitEnd(); } // this here is the static initializer { mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null); mv.visitCode(); mv.visitMethodInsn(INVOKESTATIC, "com/google/common/collect/Maps", "newHashMap", "()Ljava/util/HashMap;", false); mv.visitFieldInsn(PUTSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitLdcInsn("admin"); mv.visitLdcInsn("Mellon"); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitInsn(POP); mv.visitInsn(RETURN); mv.visitMaxs(3, 0); mv.visitEnd(); } cw.visitEnd(); return cw.toByteArray(); } }