基于Java和HTML的Seed全栈式快速Web开发框架设计源码

/*** * ASM: a very small and fast Java bytecode manipulation framework * Copyright (c) 2000-2011 INRIA, France Telecom * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ package com.opdar.framework.asm; /** * A {@link MethodVisitor} that generates methods in bytecode form. Each visit * method of this class appends the bytecode corresponding to the visited * instruction to a byte vector, in the order these methods are called. * * @author Eric Bruneton * @author Eugene Kuleshov */ public class MethodWriter extends MethodVisitor { /** * Pseudo access flag used to denote constructors. */ static final int ACC_CONSTRUCTOR = 0x80000; /** * Frame has exactly the same locals as the previous stack map frame and * number of stack items is zero. */ static final int SAME_FRAME = 0; // to 63 (0-3f) /** * Frame has exactly the same locals as the previous stack map frame and * number of stack items is 1 */ static final int SAME_LOCALS_1_STACK_ITEM_FRAME = 64; // to 127 (40-7f) /** * Reserved for future use */ static final int RESERVED = 128; /** * Frame has exactly the same locals as the previous stack map frame and * number of stack items is 1. Offset is bigger then 63; */ static final int SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED = 247; // f7 /** * Frame where current locals are the same as the locals in the previous * frame, except that the k last locals are absent. The value of k is given * by the formula 251-frame_type. */ static final int CHOP_FRAME = 248; // to 250 (f8-fA) /** * Frame has exactly the same locals as the previous stack map frame and * number of stack items is zero. Offset is bigger then 63; */ static final int SAME_FRAME_EXTENDED = 251; // fb /** * Frame where current locals are the same as the locals in the previous * frame, except that k additional locals are defined. The value of k is * given by the formula frame_type-251. */ static final int APPEND_FRAME = 252; // to 254 // fc-fe /** * Full frame */ static final int FULL_FRAME = 255; // ff /** * Indicates that the stack map frames must be recomputed from scratch. In * this case the maximum stack size and number of local variables is also * recomputed from scratch. * * @see #compute */ private static final int FRAMES = 0; /** * Indicates that the maximum stack size and number of local variables must * be automatically computed. * * @see #compute */ private static final int MAXS = 1; /** * Indicates that nothing must be automatically computed. * * @see #compute */ private static final int NOTHING = 2; /** * The class writer to which this method must be added. */ final ClassWriter cw; /** * Access flags of this method. */ private int access; /** * The index of the constant pool item that contains the name of this * method. */ private final int name; /** * The index of the constant pool item that contains the descriptor of this * method. */ private final int desc; /** * The descriptor of this method. */ private final String descriptor; /** * The signature of this method. */ String signature; /** * If not zero, indicates that the code of this method must be copied from * the ClassReader associated to this writer in <code>cw.cr</code>. More * precisely, this field gives the index of the first byte to copied from * <code>cw.cr.b</code>. */ int classReaderOffset; /** * If not zero, indicates that the code of this method must be copied from * the ClassReader associated to this writer in <code>cw.cr</code>. More * precisely, this field gives the number of bytes to copied from * <code>cw.cr.b</code>. */ int classReaderLength; /** * Number of exceptions that can be thrown by this method. */ int exceptionCount; /** * The exceptions that can be thrown by this method. More precisely, this * array contains the indexes of the constant pool items that contain the * internal names of these exception classes. */ int[] exceptions; /** * The annotation default attribute of this method. May be <tt>null</tt>. */ private ByteVector annd; /** * The runtime visible annotations of this method. May be <tt>null</tt>. */ private AnnotationWriter anns; /** * The runtime invisible annotations of this method. May be <tt>null</tt>. */ private AnnotationWriter ianns; /** * The runtime visible type annotations of this method. May be <tt>null</tt> * . */ private AnnotationWriter tanns; /** * The runtime invisible type annotations of this method. May be * <tt>null</tt>. */ private AnnotationWriter itanns; /** * The runtime visible parameter annotations of this method. May be * <tt>null</tt>. */ private AnnotationWriter[] panns; /** * The runtime invisible parameter annotations of this method. May be * <tt>null</tt>. */ private AnnotationWriter[] ipanns; /** * The number of synthetic parameters of this method. */ private int synthetics; /** * The non standard attributes of the method. */ private Attribute attrs; /** * The bytecode of this method. */ private ByteVector code = new ByteVector(); /** * Maximum stack size of this method. */ private int maxStack; /** * Maximum number of local variables for this method. */ private int maxLocals; /** * Number of local variables in the current stack map frame. */ private int currentLocals; /** * Number of stack map frames in the StackMapTable attribute. */ private int frameCount; /** * The StackMapTable attribute. */ private ByteVector stackMap; /** * The offset of the last frame that was written in the StackMapTable * attribute. */ private int previousFrameOffset; /** * The last frame that was written in the StackMapTable attribute. * * @see #frame */ private int[] previousFrame; /** * The current stack map fram