methodnode.java

asm的源码包 并且包含英文的文档

                : labelNodes(stack)));
    }

    public void visitInsn(final int opcode) {
        instructions.add(new InsnNode(opcode));
    }

    public void visitIntInsn(final int opcode, final int operand) {
        instructions.add(new IntInsnNode(opcode, operand));
    }

    public void visitVarInsn(final int opcode, final int var) {
        instructions.add(new VarInsnNode(opcode, var));
    }

    public void visitTypeInsn(final int opcode, final String desc) {
        instructions.add(new TypeInsnNode(opcode, desc));
    }

    public void visitFieldInsn(
        final int opcode,
        final String owner,
        final String name,
        final String desc)
    {
        instructions.add(new FieldInsnNode(opcode, owner, name, desc));
    }

    public void visitMethodInsn(
        final int opcode,
        final String owner,
        final String name,
        final String desc)
    {
        instructions.add(new MethodInsnNode(opcode, owner, name, desc));
    }

    public void visitJumpInsn(final int opcode, final Label label) {
        instructions.add(new JumpInsnNode(opcode, labelNode(label)));
    }

    public void visitLabel(final Label label) {
        instructions.add(labelNode(label));
    }

    public void visitLdcInsn(final Object cst) {
        instructions.add(new LdcInsnNode(cst));
    }

    public void visitIincInsn(final int var, final int increment) {
        instructions.add(new IincInsnNode(var, increment));
    }

    public void visitTableSwitchInsn(
        final int min,
        final int max,
        final Label dflt,
        final Label[] labels)
    {
        instructions.add(new TableSwitchInsnNode(min,
                max,
                labelNode(dflt),
                labelNodes(labels)));
    }

    public void visitLookupSwitchInsn(
        final Label dflt,
        final int[] keys,
        final Label[] labels)
    {
        instructions.add(new LookupSwitchInsnNode(labelNode(dflt),
                keys,
                labelNodes(labels)));
    }

    public void visitMultiANewArrayInsn(final String desc, final int dims) {
        instructions.add(new MultiANewArrayInsnNode(desc, dims));
    }

    public void visitTryCatchBlock(
        final Label start,
        final Label end,
        final Label handler,
        final String type)
    {
        tryCatchBlocks.add(new TryCatchBlockNode(labelNode(start),
                labelNode(end),
                labelNode(handler),
                type));
    }

    public void visitLocalVariable(
        final String name,
        final String desc,
        final String signature,
        final Label start,
        final Label end,
        final int index)
    {
        localVariables.add(new LocalVariableNode(name,
                desc,
                signature,
                labelNode(start),
                labelNode(end),
                index));
    }

    public void visitLineNumber(final int line, final Label start) {
        instructions.add(new LineNumberNode(line, labelNode(start)));
    }

    public void visitMaxs(final int maxStack, final int maxLocals) {
        this.maxStack = maxStack;
        this.maxLocals = maxLocals;
    }

    private static LabelNode labelNode(final Label l) {
        if (l.info == null) {
            l.info = new LabelNode(l);
        }
        return (LabelNode) l.info;
    }

    private static LabelNode[] labelNodes(final Label[] l) {
        LabelNode[] nodes = new LabelNode[l.length];
        for (int i = 0; i < l.length; ++i) {
            nodes[i] = labelNode(l[i]);
        }
        return nodes;
    }

    private static Object[] labelNodes(final Object[] objs) {
        Object[] nodes = new Object[objs.length];
        for (int i = 0; i < objs.length; ++i) {
            Object o = objs[i];
            if (o instanceof Label) {
                o = labelNode((Label) o);
            }
            nodes[i] = o;
        }
        return nodes;
    }

    // ------------------------------------------------------------------------
    // Accept method
    // ------------------------------------------------------------------------

    /**
     * Makes the given class visitor visit this method.
     * 
     * @param cv a class visitor.
     */
    public void accept(final ClassVisitor cv) {
        String[] exceptions = new String[this.exceptions.size()];
        this.exceptions.toArray(exceptions);
        MethodVisitor mv = cv.visitMethod(access,
                name,
                desc,
                signature,
                exceptions);
        if (mv != null) {
            accept(mv);
        }
    }

    /**
     * Makes the given method visitor visit this method.
     * 
     * @param mv a method visitor.
     */
    public void accept(final MethodVisitor mv) {
        // visits the method attributes
        int i, j, n;
        if (annotationDefault != null) {
            AnnotationVisitor av = mv.visitAnnotationDefault();
            AnnotationNode.accept(av, null, annotationDefault);
            if (av != null) {
                av.visitEnd();
            }
        }
        n = visibleAnnotations == null ? 0 : visibleAnnotations.size();
        for (i = 0; i < n; ++i) {
            AnnotationNode an = (AnnotationNode) visibleAnnotations.get(i);
            an.accept(mv.visitAnnotation(an.desc, true));
        }
        n = invisibleAnnotations == null ? 0 : invisibleAnnotations.size();
        for (i = 0; i < n; ++i) {
            AnnotationNode an = (AnnotationNode) invisibleAnnotations.get(i);
            an.accept(mv.visitAnnotation(an.desc, false));
        }
        n = visibleParameterAnnotations == null
                ? 0
                : visibleParameterAnnotations.length;
        for (i = 0; i < n; ++i) {
            List l = visibleParameterAnnotations[i];
            if (l == null) {
                continue;
            }
            for (j = 0; j < l.size(); ++j) {
                AnnotationNode an = (AnnotationNode) l.get(j);
                an.accept(mv.visitParameterAnnotation(i, an.desc, true));
            }
        }
        n = invisibleParameterAnnotations == null
                ? 0
                : invisibleParameterAnnotations.length;
        for (i = 0; i < n; ++i) {
            List l = invisibleParameterAnnotations[i];
            if (l == null) {
                continue;
            }
            for (j = 0; j < l.size(); ++j) {
                AnnotationNode an = (AnnotationNode) l.get(j);
                an.accept(mv.visitParameterAnnotation(i, an.desc, false));
            }
        }
        n = attrs == null ? 0 : attrs.size();
        for (i = 0; i < n; ++i) {
            mv.visitAttribute((Attribute) attrs.get(i));
        }
        // visits the method's code
        if (instructions.size() > 0) {
            mv.visitCode();
            // visits try catch blocks
            for (i = 0; i < tryCatchBlocks.size(); ++i) {
                ((TryCatchBlockNode) tryCatchBlocks.get(i)).accept(mv);
            }
            // visits instructions
            instructions.accept(mv);
            // visits local variables
            n = localVariables == null ? 0 : localVariables.size();
            for (i = 0; i < n; ++i) {
                ((LocalVariableNode) localVariables.get(i)).accept(mv);
            }
            // visits maxs
            mv.visitMaxs(maxStack, maxLocals);
        }
        mv.visitEnd();
    }
}