Examples of org.objectweb.asm.MethodVisitor.visitLabel()

org.objectweb.asm.MethodVisitor.visitLabel()
Visits a label. A label designates the instruction that will be visited just after it. @param label a {@link Label Label} object.


    Label l5 = new Label();
    mv.visitJumpInsn(IF_ICMPEQ, l5);


    Label l6 = new Label();
    mv.visitLabel(l6);
    mv.visitVarInsn(ALOAD, meansLocal);
    mv.visitVarInsn(ILOAD, rowLocal);
    mv.visitInsn(DUP2);


    // load the current row sum at index rowLocal onto the stack

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    // add to sum
    mv.visitInsn(DADD);
    mv.visitInsn(DASTORE);


    Label l7 = new Label();
    mv.visitLabel(l7);
    mv.visitIincInsn(rowLocal, 1);


    // check if we've hit the end of the rows
    // and need to start again
    Label l8 = new Label();

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        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", 
                            "(Ljava/util/Map;)V", 
                            "(Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;)V", null);
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(30, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL,
                           "com/sun/xml/internal/bind/marshaller/NamespacePrefixMapper", "<init>", "()V");
        Label l1 = new Label();

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        mv.visitLineNumber(30, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL,
                           "com/sun/xml/internal/bind/marshaller/NamespacePrefixMapper", "<init>", "()V");
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLineNumber(31, l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, "org/apache/cxf/jaxb/NamespaceMapperInternal",
                          "nspref", "Ljava/util/Map;");

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        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, "org/apache/cxf/jaxb/NamespaceMapperInternal",
                          "nspref", "Ljava/util/Map;");
        Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitLineNumber(32, l2);
        mv.visitInsn(Opcodes.RETURN);
        Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLocalVariable("this", "Lorg/apache/cxf/jaxb/NamespaceMapperInternal;", null, l0, l3, 0);

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        Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitLineNumber(32, l2);
        mv.visitInsn(Opcodes.RETURN);
        Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLocalVariable("this", "Lorg/apache/cxf/jaxb/NamespaceMapperInternal;", null, l0, l3, 0);
        mv.visitLocalVariable("nspref", "Ljava/util/Map;",
                              "Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;", 
                              l0, l3, 1);
        mv.visitMaxs(2, 2);

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        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "getPreferredPrefix",
                            "(Ljava/lang/String;Ljava/lang/String;Z)Ljava/lang/String;",
                            null, null);
        mv.visitCode();
        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(38, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, 
                          "org/apache/cxf/jaxb/NamespaceMapperInternal", 
                          "nspref", "Ljava/util/Map;");

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        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", 
                           "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
        mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/String");
        mv.visitVarInsn(Opcodes.ASTORE, 4);
        l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLineNumber(39, l1);
        mv.visitVarInsn(Opcodes.ALOAD, 4);
        l2 = new Label();
        mv.visitJumpInsn(Opcodes.IFNULL, l2);
        l3 = new Label();

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        mv.visitLineNumber(39, l1);
        mv.visitVarInsn(Opcodes.ALOAD, 4);
        l2 = new Label();
        mv.visitJumpInsn(Opcodes.IFNULL, l2);
        l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLineNumber(40, l3);
        mv.visitVarInsn(Opcodes.ALOAD, 4);
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitLabel(l2);
        mv.visitLineNumber(42, l2);

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        l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLineNumber(40, l3);
        mv.visitVarInsn(Opcodes.ALOAD, 4);
        mv.visitInsn(Opcodes.ARETURN);
        mv.visitLabel(l2);
        mv.visitLineNumber(42, l2);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitInsn(Opcodes.ARETURN);
        Label l4 = new Label();
        mv.visitLabel(l4);

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