Examples of org.ow2.asm.MethodVisitor

org.ow2.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitFrame | visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | visitLineNumber)* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, visitTryCatchBlock must be called before the labels passed as arguments have been visited, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

        } catch (Exception e) {
        }
    }


    public void testIllegalTableSwitchParameters2() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitTableSwitchInsn(0, 1, null, new Label[0]);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalTableSwitchParameters3() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitTableSwitchInsn(0, 1, new Label(), (Label[])null);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalTableSwitchParameters4() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitTableSwitchInsn(0, 1, new Label(), new Label[0]);
            fail();
        } catch (Exception e) {
        }
    }

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        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void varargMethod(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS + ACC_STRICT,
                "varargMethod",
                "([Ljava/lang/Object;)V",
                "([Ljava/lang/Object;)V^TF;",
                new String[] { "java/lang/Exception" });
        mv.visitCode();
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalLookupSwitchParameters1() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitLookupSwitchInsn(new Label(), null, new Label[0]);
            fail();
        } catch (Exception e) {
        }
    }

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        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void bridgeMethod(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
                "get",
                "(I)Ljava/lang/String;",
                null,
                null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ILOAD, 1);
        mv.visitMethodInsn(INVOKESPECIAL,
                "java/util/ArrayList",
                "get",
                "(I)Ljava/lang/Object;");
        mv.visitTypeInsn(CHECKCAST, "java/lang/String");
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        mv = cw.visitMethod(ACC_PUBLIC + ACC_BRIDGE + ACC_SYNTHETIC,
                "get",
                "(I)Ljava/lang/Object;",
                "(I)TE;",
                null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ILOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL,
                "pkg/Insns",
                "get",
                "(I)Ljava/lang/String;");
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalLookupSwitchParameters2() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitLookupSwitchInsn(new Label(), new int[0], null);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalLookupSwitchParameters3() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitLookupSwitchInsn(new Label(), new int[0], new Label[1]);
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalFieldInsnNullOwner() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitFieldInsn(GETFIELD, null, "i", "I");
            fail();
        } catch (Exception e) {
        }
    }

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        } catch (Exception e) {
        }
    }


    public void testIllegalFieldInsnOwner() {
        MethodVisitor mv = new CheckMethodAdapter(new EmptyVisitor());
        mv.visitCode();
        try {
            mv.visitFieldInsn(GETFIELD, "-", "i", "I");
            fail();
        } catch (Exception e) {
        }
    }

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