| /** |
| * 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. |
| */ |
| package org.apache.drill.exec.compile; |
| |
| import org.apache.drill.exec.compile.sig.SignatureHolder; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class DrillInitMethodVisitor extends MethodVisitor { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DrillInitMethodVisitor.class); |
| |
| final String className; |
| |
| public DrillInitMethodVisitor(String className, MethodVisitor mv){ |
| super(CompilationConfig.ASM_API_VERSION, mv); |
| this.className = className; |
| } |
| |
| @Override |
| public void visitInsn(int opcode) { |
| if(opcode == Opcodes.RETURN) { |
| // Load this. |
| super.visitVarInsn(Opcodes.ALOAD, 0); |
| |
| // Execute drill init. |
| super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, className, SignatureHolder.DRILL_INIT_METHOD, "()V", false); |
| } |
| super.visitInsn(opcode); |
| } |
| } |