asmcontenthandler.java

asm的源码包 并且包含英文的文档

                        stack);
            } else if (type.equals("APPEND")) {
                getCodeVisitor().visitFrame(Opcodes.F_APPEND,
                        nLocal,
                        local,
                        0,
                        null);
            } else if (type.equals("CHOP")) {
                getCodeVisitor().visitFrame(Opcodes.F_CHOP,
                        Integer.parseInt(count),
                        null,
                        0,
                        null);
            } else if (type.equals("SAME")) {
                getCodeVisitor().visitFrame(Opcodes.F_SAME, 0, null, 0, null);
            } else if (type.equals("SAME1")) {
                getCodeVisitor().visitFrame(Opcodes.F_SAME1,
                        0,
                        null,
                        nStack,
                        stack);
            }
        }
    }

    private final class FrameTypeRule extends Rule {

        public void begin(final String name, final Attributes attrs) {
            List types = (List) ((HashMap) peek()).get(name);
            String type = attrs.getValue("type");
            if ("uninitialized".equals(type)) {
                types.add(getLabel(attrs.getValue("label")));
            } else {
                Integer t = (Integer) TYPES.get(type);
                if (t == null) {
                    types.add(type);
                } else {
                    types.add(t);
                }
            }
        }
    }

    /**
     * LabelRule
     */
    private final class LabelRule extends Rule {

        public final void begin(final String name, final Attributes attrs) {
            getCodeVisitor().visitLabel(getLabel(attrs.getValue("name")));
        }
    }

    /**
     * TryCatchRule
     */
    private final class TryCatchRule extends Rule {

        public final void begin(final String name, final Attributes attrs) {
            Label start = getLabel(attrs.getValue("start"));
            Label end = getLabel(attrs.getValue("end"));
            Label handler = getLabel(attrs.getValue("handler"));
            String type = attrs.getValue("type");
            getCodeVisitor().visitTryCatchBlock(start, end, handler, type);
        }
    }

    /**
     * LineNumberRule
     */
    private final class LineNumberRule extends Rule {

        public final void begin(final String name, final Attributes attrs) {
            int line = Integer.parseInt(attrs.getValue("line"));
            Label start = getLabel(attrs.getValue("start"));
            getCodeVisitor().visitLineNumber(line, start);
        }
    }

    /**
     * LocalVarRule
     */
    private final class LocalVarRule extends Rule {

        public final void begin(final String element, final Attributes attrs) {
            String name = attrs.getValue("name");
            String desc = attrs.getValue("desc");
            String signature = attrs.getValue("signature");
            Label start = getLabel(attrs.getValue("start"));
            Label end = getLabel(attrs.getValue("end"));
            int var = Integer.parseInt(attrs.getValue("var"));
            getCodeVisitor().visitLocalVariable(name,
                    desc,
                    signature,
                    start,
                    end,
                    var);
        }
    }

    /**
     * OpcodesRule
     */
    private final class OpcodesRule extends Rule {

        // public boolean match( String match, String element) {
        // return match.startsWith( path) && OPCODES.containsKey( element);
        // }

        public final void begin(final String element, final Attributes attrs)
                throws SAXException
        {
            Opcode o = (Opcode) OPCODES.get(element);
            if (o == null) {
                throw new SAXException("Invalid element: " + element + " at "
                        + match);
            }

            switch (o.type) {
                case OpcodeGroup.INSN:
                    getCodeVisitor().visitInsn(o.opcode);
                    break;

                case OpcodeGroup.INSN_FIELD:
                    getCodeVisitor().visitFieldInsn(o.opcode,
                            attrs.getValue("owner"),
                            attrs.getValue("name"),
                            attrs.getValue("desc"));
                    break;

                case OpcodeGroup.INSN_INT:
                    getCodeVisitor().visitIntInsn(o.opcode,
                            Integer.parseInt(attrs.getValue("value")));
                    break;

                case OpcodeGroup.INSN_JUMP:
                    getCodeVisitor().visitJumpInsn(o.opcode,
                            getLabel(attrs.getValue("label")));
                    break;

                case OpcodeGroup.INSN_METHOD:
                    getCodeVisitor().visitMethodInsn(o.opcode,
                            attrs.getValue("owner"),
                            attrs.getValue("name"),
                            attrs.getValue("desc"));
                    break;

                case OpcodeGroup.INSN_TYPE:
                    getCodeVisitor().visitTypeInsn(o.opcode,
                            attrs.getValue("desc"));
                    break;

                case OpcodeGroup.INSN_VAR:
                    getCodeVisitor().visitVarInsn(o.opcode,
                            Integer.parseInt(attrs.getValue("var")));
                    break;

                case OpcodeGroup.INSN_IINC:
                    getCodeVisitor().visitIincInsn(Integer.parseInt(attrs.getValue("var")),
                            Integer.parseInt(attrs.getValue("inc")));
                    break;

                case OpcodeGroup.INSN_LDC:
                    getCodeVisitor().visitLdcInsn(getValue(attrs.getValue("desc"),
                            attrs.getValue("cst")));
                    break;

                case OpcodeGroup.INSN_MULTIANEWARRAY:
                    getCodeVisitor().visitMultiANewArrayInsn(attrs.getValue("desc"),
                            Integer.parseInt(attrs.getValue("dims")));
                    break;

                default:
                    throw new Error("Internal error");

            }
        }
    }

    /**
     * MaxRule
     */
    private final class MaxRule extends Rule {

        public final void begin(final String element, final Attributes attrs) {
            int maxStack = Integer.parseInt(attrs.getValue("maxStack"));
            int maxLocals = Integer.parseInt(attrs.getValue("maxLocals"));
            getCodeVisitor().visitMaxs(maxStack, maxLocals);
        }
    }

    private final class AnnotationRule extends Rule {

        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();

            Object v = peek();
            if (v instanceof ClassVisitor) {
                push(((ClassVisitor) v).visitAnnotation(desc, visible));
            } else if (v instanceof FieldVisitor) {
                push(((FieldVisitor) v).visitAnnotation(desc, visible));
            } else if (v instanceof MethodVisitor) {
                push(((MethodVisitor) v).visitAnnotation(desc, visible));
            }
        }

        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    private final class AnnotationParameterRule extends Rule {

        public void begin(final String name, final Attributes attrs) {
            int parameter = Integer.parseInt(attrs.getValue("parameter"));
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();

            push(((MethodVisitor) peek()).visitParameterAnnotation(parameter,
                    desc,
                    visible));
        }

        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    private final class AnnotationValueRule extends Rule {

        public void begin(final String nm, final Attributes attrs)
                throws SAXException
        {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            if (av != null) {
                av.visit(attrs.getValue("name"),
                        getValue(attrs.getValue("desc"),
                                attrs.getValue("value")));
            }
        }
    }

    private final class AnnotationValueEnumRule extends Rule {

        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            if (av != null) {
                av.visitEnum(attrs.getValue("name"),
                        attrs.getValue("desc"),
                        attrs.getValue("value"));
            }
        }
    }

    private final class AnnotationValueAnnotationRule extends Rule {

        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            push(av == null ? null : av.visitAnnotation(attrs.getValue("name"),
                    attrs.getValue("desc")));
        }

        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    private final class AnnotationValueArrayRule extends Rule {

        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            push(av == null ? null : av.visitArray(attrs.getValue("name")));
        }

        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    private final class AnnotationDefaultRule extends Rule {

        public void begin(final String nm, final Attributes attrs) {
            MethodVisitor av = (MethodVisitor) peek();
            push(av == null ? null : av.visitAnnotationDefault());
        }

        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    /**
     * Opcode
     */
    private final static class Opcode {

        public int opcode;

        public int type;

        public Opcode(final int opcode, final int type) {
            this.opcode = opcode;
            this.type = type;
        }
    }
}