| import org.codehaus.groovy.classgen.AnnotationVisitor |
| import org.objectweb.asm.ClassWriter |
| import org.objectweb.asm.FieldVisitor |
| import org.objectweb.asm.Label |
| import org.objectweb.asm.MethodVisitor |
| |
| import static org.objectweb.asm.Opcodes.* |
| |
| /* |
| * Copyright 2003-2012 the original author or authors. |
| * |
| * Licensed 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. |
| */ |
| |
| buildscript { |
| repositories { |
| mavenCentral() |
| } |
| dependencies { |
| classpath "org.ow2.asm:asm:4.0" |
| } |
| } |
| |
| /** |
| * This tasks generates an utility class which allows sneaky throwing. |
| */ |
| task exceptionUtils { |
| ext.classFiles = [ |
| "${compileCompilerJava.destinationDir}/org/codehaus/groovy/runtime/ExceptionUtils.class", |
| "${compileJava.destinationDir}/org/codehaus/groovy/runtime/ExceptionUtils.class"] |
| outputs.files classFiles |
| |
| doLast { |
| ClassWriter cw = new ClassWriter(0); |
| FieldVisitor fv; |
| MethodVisitor mv; |
| AnnotationVisitor av0; |
| |
| cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, "org/codehaus/groovy/runtime/ExceptionUtils", null, "java/lang/Object", null); |
| |
| cw.visitSource("ExceptionUtils.java", null); |
| |
| mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| Label l0 = new Label(); |
| mv.visitLabel(l0); |
| mv.visitLineNumber(18, l0); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); |
| mv.visitInsn(RETURN); |
| Label l1 = new Label(); |
| mv.visitLabel(l1); |
| mv.visitLocalVariable("this", "Lorg/codehaus/groovy/runtime/ExceptionUtils;", null, l0, l1, 0); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| |
| mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "sneakyThrow", "(Ljava/lang/Throwable;)V", null, null); |
| mv.visitCode(); |
| Label l2 = new Label(); |
| mv.visitLabel(l2); |
| mv.visitLineNumber(20, l2); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitInsn(ATHROW); |
| Label l3 = new Label(); |
| mv.visitLabel(l3); |
| mv.visitLocalVariable("e", "Ljava/lang/Throwable;", null, l2, l3, 0); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| |
| cw.visitEnd(); |
| |
| logger.lifecycle("Generating ExceptionUtils") |
| classFiles.each { classFile -> |
| def output = file(classFile) |
| output.parentFile.mkdirs() |
| output.withOutputStream { |
| it << cw.toByteArray() |
| } |
| } |
| } |
| } |