| // 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 org.apache.tapestry5.internal.plastic.asm; |
| |
| /** |
| * A visitor to visit a Java method. The methods of this class must be called in the following |
| * order: ( {@code visitParameter} )* [ {@code visitAnnotationDefault} ] ( {@code visitAnnotation} | |
| * {@code visitAnnotableParameterCount} | {@code visitParameterAnnotation} {@code |
| * visitTypeAnnotation} | {@code visitAttribute} )* [ {@code visitCode} ( {@code visitFrame} | |
| * {@code visit<i>X</i>Insn} | {@code visitLabel} | {@code visitInsnAnnotation} | {@code |
| * visitTryCatchBlock} | {@code visitTryCatchAnnotation} | {@code visitLocalVariable} | {@code |
| * visitLocalVariableAnnotation} | {@code visitLineNumber} )* {@code visitMaxs} ] {@code visitEnd}. |
| * In addition, the {@code visit<i>X</i>Insn} and {@code visitLabel} methods must be called in the |
| * sequential order of the bytecode instructions of the visited code, {@code visitInsnAnnotation} |
| * must be called <i>after</i> the annotated instruction, {@code visitTryCatchBlock} must be called |
| * <i>before</i> the labels passed as arguments have been visited, {@code |
| * visitTryCatchBlockAnnotation} must be called <i>after</i> the corresponding try catch block has |
| * been visited, and the {@code visitLocalVariable}, {@code visitLocalVariableAnnotation} and {@code |
| * visitLineNumber} methods must be called <i>after</i> the labels passed as arguments have been |
| * visited. |
| * |
| * @author Eric Bruneton |
| */ |
| public abstract class MethodVisitor { |
| |
| private static final String REQUIRES_ASM5 = "This feature requires ASM5"; |
| |
| /** |
| * The ASM API version implemented by this visitor. The value of this field must be one of {@link |
| * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}. |
| */ |
| protected final int api; |
| |
| /** |
| * The method visitor to which this visitor must delegate method calls. May be {@literal null}. |
| */ |
| protected MethodVisitor mv; |
| |
| /** |
| * Constructs a new {@link MethodVisitor}. |
| * |
| * @param api the ASM API version implemented by this visitor. Must be one of {@link |
| * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}. |
| */ |
| public MethodVisitor(final int api) { |
| this(api, null); |
| } |
| |
| /** |
| * Constructs a new {@link MethodVisitor}. |
| * |
| * @param api the ASM API version implemented by this visitor. Must be one of {@link |
| * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}. |
| * @param methodVisitor the method visitor to which this visitor must delegate method calls. May |
| * be null. |
| */ |
| public MethodVisitor(final int api, final MethodVisitor methodVisitor) { |
| if (api != Opcodes.ASM8 |
| && api != Opcodes.ASM7 |
| && api != Opcodes.ASM6 |
| && api != Opcodes.ASM5 |
| && api != Opcodes.ASM4 |
| && api != Opcodes.ASM9_EXPERIMENTAL) { |
| throw new IllegalArgumentException("Unsupported api " + api); |
| } |
| if (api == Opcodes.ASM9_EXPERIMENTAL) { |
| Constants.checkAsmExperimental(this); |
| } |
| this.api = api; |
| this.mv = methodVisitor; |
| } |
| |
| // ----------------------------------------------------------------------------------------------- |
| // Parameters, annotations and non standard attributes |
| // ----------------------------------------------------------------------------------------------- |
| |
| /** |
| * Visits a parameter of this method. |
| * |
| * @param name parameter name or {@literal null} if none is provided. |
| * @param access the parameter's access flags, only {@code ACC_FINAL}, {@code ACC_SYNTHETIC} |
| * or/and {@code ACC_MANDATED} are allowed (see {@link Opcodes}). |
| */ |
| public void visitParameter(final String name, final int access) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| mv.visitParameter(name, access); |
| } |
| } |
| |
| /** |
| * Visits the default value of this annotation interface method. |
| * |
| * @return a visitor to the visit the actual default value of this annotation interface method, or |
| * {@literal null} if this visitor is not interested in visiting this default value. The |
| * 'name' parameters passed to the methods of this annotation visitor are ignored. Moreover, |
| * exacly one visit method must be called on this annotation visitor, followed by visitEnd. |
| */ |
| public AnnotationVisitor visitAnnotationDefault() { |
| if (mv != null) { |
| return mv.visitAnnotationDefault(); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits an annotation of this method. |
| * |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) { |
| if (mv != null) { |
| return mv.visitAnnotation(descriptor, visible); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits an annotation on a type in the method signature. |
| * |
| * @param typeRef a reference to the annotated type. The sort of this type reference must be |
| * {@link TypeReference#METHOD_TYPE_PARAMETER}, {@link |
| * TypeReference#METHOD_TYPE_PARAMETER_BOUND}, {@link TypeReference#METHOD_RETURN}, {@link |
| * TypeReference#METHOD_RECEIVER}, {@link TypeReference#METHOD_FORMAL_PARAMETER} or {@link |
| * TypeReference#THROWS}. See {@link TypeReference}. |
| * @param typePath the path to the annotated type argument, wildcard bound, array element type, or |
| * static inner type within 'typeRef'. May be {@literal null} if the annotation targets |
| * 'typeRef' as a whole. |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitTypeAnnotation( |
| final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| return mv.visitTypeAnnotation(typeRef, typePath, descriptor, visible); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits the number of method parameters that can have annotations. By default (i.e. when this |
| * method is not called), all the method parameters defined by the method descriptor can have |
| * annotations. |
| * |
| * @param parameterCount the number of method parameters than can have annotations. This number |
| * must be less or equal than the number of parameter types in the method descriptor. It can |
| * be strictly less when a method has synthetic parameters and when these parameters are |
| * ignored when computing parameter indices for the purpose of parameter annotations (see |
| * https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18). |
| * @param visible {@literal true} to define the number of method parameters that can have |
| * annotations visible at runtime, {@literal false} to define the number of method parameters |
| * that can have annotations invisible at runtime. |
| */ |
| public void visitAnnotableParameterCount(final int parameterCount, final boolean visible) { |
| if (mv != null) { |
| mv.visitAnnotableParameterCount(parameterCount, visible); |
| } |
| } |
| |
| /** |
| * Visits an annotation of a parameter this method. |
| * |
| * @param parameter the parameter index. This index must be strictly smaller than the number of |
| * parameters in the method descriptor, and strictly smaller than the parameter count |
| * specified in {@link #visitAnnotableParameterCount}. Important note: <i>a parameter index i |
| * is not required to correspond to the i'th parameter descriptor in the method |
| * descriptor</i>, in particular in case of synthetic parameters (see |
| * https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18). |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitParameterAnnotation( |
| final int parameter, final String descriptor, final boolean visible) { |
| if (mv != null) { |
| return mv.visitParameterAnnotation(parameter, descriptor, visible); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits a non standard attribute of this method. |
| * |
| * @param attribute an attribute. |
| */ |
| public void visitAttribute(final Attribute attribute) { |
| if (mv != null) { |
| mv.visitAttribute(attribute); |
| } |
| } |
| |
| /** Starts the visit of the method's code, if any (i.e. non abstract method). */ |
| public void visitCode() { |
| if (mv != null) { |
| mv.visitCode(); |
| } |
| } |
| |
| /** |
| * Visits the current state of the local variables and operand stack elements. This method must(*) |
| * be called <i>just before</i> any instruction <b>i</b> that follows an unconditional branch |
| * instruction such as GOTO or THROW, that is the target of a jump instruction, or that starts an |
| * exception handler block. The visited types must describe the values of the local variables and |
| * of the operand stack elements <i>just before</i> <b>i</b> is executed.<br> |
| * <br> |
| * (*) this is mandatory only for classes whose version is greater than or equal to {@link |
| * Opcodes#V1_6}. <br> |
| * <br> |
| * The frames of a method must be given either in expanded form, or in compressed form (all frames |
| * must use the same format, i.e. you must not mix expanded and compressed frames within a single |
| * method): |
| * |
| * <ul> |
| * <li>In expanded form, all frames must have the F_NEW type. |
| * <li>In compressed form, frames are basically "deltas" from the state of the previous frame: |
| * <ul> |
| * <li>{@link Opcodes#F_SAME} representing frame with exactly the same locals as the |
| * previous frame and with the empty stack. |
| * <li>{@link Opcodes#F_SAME1} representing frame with exactly the same locals as the |
| * previous frame and with single value on the stack ( <code>numStack</code> is 1 and |
| * <code>stack[0]</code> contains value for the type of the stack item). |
| * <li>{@link Opcodes#F_APPEND} representing frame with current locals are the same as the |
| * locals in the previous frame, except that additional locals are defined (<code> |
| * numLocal</code> is 1, 2 or 3 and <code>local</code> elements contains values |
| * representing added types). |
| * <li>{@link Opcodes#F_CHOP} representing frame with current locals are the same as the |
| * locals in the previous frame, except that the last 1-3 locals are absent and with |
| * the empty stack (<code>numLocal</code> is 1, 2 or 3). |
| * <li>{@link Opcodes#F_FULL} representing complete frame data. |
| * </ul> |
| * </ul> |
| * |
| * <br> |
| * In both cases the first frame, corresponding to the method's parameters and access flags, is |
| * implicit and must not be visited. Also, it is illegal to visit two or more frames for the same |
| * code location (i.e., at least one instruction must be visited between two calls to visitFrame). |
| * |
| * @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded |
| * frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link |
| * Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames. |
| * @param numLocal the number of local variables in the visited frame. |
| * @param local the local variable types in this frame. This array must not be modified. Primitive |
| * types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link |
| * Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or |
| * {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element). |
| * Reference types are represented by String objects (representing internal names), and |
| * uninitialized types by Label objects (this label designates the NEW instruction that |
| * created this uninitialized value). |
| * @param numStack the number of operand stack elements in the visited frame. |
| * @param stack the operand stack types in this frame. This array must not be modified. Its |
| * content has the same format as the "local" array. |
| * @throws IllegalStateException if a frame is visited just after another one, without any |
| * instruction between the two (unless this frame is a Opcodes#F_SAME frame, in which case it |
| * is silently ignored). |
| */ |
| public void visitFrame( |
| final int type, |
| final int numLocal, |
| final Object[] local, |
| final int numStack, |
| final Object[] stack) { |
| if (mv != null) { |
| mv.visitFrame(type, numLocal, local, numStack, stack); |
| } |
| } |
| |
| // ----------------------------------------------------------------------------------------------- |
| // Normal instructions |
| // ----------------------------------------------------------------------------------------------- |
| |
| /** |
| * Visits a zero operand instruction. |
| * |
| * @param opcode the opcode of the instruction to be visited. This opcode is either NOP, |
| * ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, |
| * LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, |
| * FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, |
| * AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, |
| * SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, |
| * FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, |
| * LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, |
| * D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, |
| * DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT. |
| */ |
| public void visitInsn(final int opcode) { |
| if (mv != null) { |
| mv.visitInsn(opcode); |
| } |
| } |
| |
| /** |
| * Visits an instruction with a single int operand. |
| * |
| * @param opcode the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH |
| * or NEWARRAY. |
| * @param operand the operand of the instruction to be visited.<br> |
| * When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE. |
| * <br> |
| * When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE. |
| * <br> |
| * When opcode is NEWARRAY, operand value should be one of {@link Opcodes#T_BOOLEAN}, {@link |
| * Opcodes#T_CHAR}, {@link Opcodes#T_FLOAT}, {@link Opcodes#T_DOUBLE}, {@link Opcodes#T_BYTE}, |
| * {@link Opcodes#T_SHORT}, {@link Opcodes#T_INT} or {@link Opcodes#T_LONG}. |
| */ |
| public void visitIntInsn(final int opcode, final int operand) { |
| if (mv != null) { |
| mv.visitIntInsn(opcode, operand); |
| } |
| } |
| |
| /** |
| * Visits a local variable instruction. A local variable instruction is an instruction that loads |
| * or stores the value of a local variable. |
| * |
| * @param opcode the opcode of the local variable instruction to be visited. This opcode is either |
| * ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET. |
| * @param var the operand of the instruction to be visited. This operand is the index of a local |
| * variable. |
| */ |
| public void visitVarInsn(final int opcode, final int var) { |
| if (mv != null) { |
| mv.visitVarInsn(opcode, var); |
| } |
| } |
| |
| /** |
| * Visits a type instruction. A type instruction is an instruction that takes the internal name of |
| * a class as parameter. |
| * |
| * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW, |
| * ANEWARRAY, CHECKCAST or INSTANCEOF. |
| * @param type the operand of the instruction to be visited. This operand must be the internal |
| * name of an object or array class (see {@link Type#getInternalName()}). |
| */ |
| public void visitTypeInsn(final int opcode, final String type) { |
| if (mv != null) { |
| mv.visitTypeInsn(opcode, type); |
| } |
| } |
| |
| /** |
| * Visits a field instruction. A field instruction is an instruction that loads or stores the |
| * value of a field of an object. |
| * |
| * @param opcode the opcode of the type instruction to be visited. This opcode is either |
| * GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD. |
| * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}). |
| * @param name the field's name. |
| * @param descriptor the field's descriptor (see {@link Type}). |
| */ |
| public void visitFieldInsn( |
| final int opcode, final String owner, final String name, final String descriptor) { |
| if (mv != null) { |
| mv.visitFieldInsn(opcode, owner, name, descriptor); |
| } |
| } |
| |
| /** |
| * Visits a method instruction. A method instruction is an instruction that invokes a method. |
| * |
| * @param opcode the opcode of the type instruction to be visited. This opcode is either |
| * INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE. |
| * @param owner the internal name of the method's owner class (see {@link |
| * Type#getInternalName()}). |
| * @param name the method's name. |
| * @param descriptor the method's descriptor (see {@link Type}). |
| * @deprecated use {@link #visitMethodInsn(int, String, String, String, boolean)} instead. |
| */ |
| @Deprecated |
| public void visitMethodInsn( |
| final int opcode, final String owner, final String name, final String descriptor) { |
| int opcodeAndSource = opcode | (api < Opcodes.ASM5 ? Opcodes.SOURCE_DEPRECATED : 0); |
| visitMethodInsn(opcodeAndSource, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE); |
| } |
| |
| /** |
| * Visits a method instruction. A method instruction is an instruction that invokes a method. |
| * |
| * @param opcode the opcode of the type instruction to be visited. This opcode is either |
| * INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE. |
| * @param owner the internal name of the method's owner class (see {@link |
| * Type#getInternalName()}). |
| * @param name the method's name. |
| * @param descriptor the method's descriptor (see {@link Type}). |
| * @param isInterface if the method's owner class is an interface. |
| */ |
| public void visitMethodInsn( |
| final int opcode, |
| final String owner, |
| final String name, |
| final String descriptor, |
| final boolean isInterface) { |
| if (api < Opcodes.ASM5 && (opcode & Opcodes.SOURCE_DEPRECATED) == 0) { |
| if (isInterface != (opcode == Opcodes.INVOKEINTERFACE)) { |
| throw new UnsupportedOperationException("INVOKESPECIAL/STATIC on interfaces requires ASM5"); |
| } |
| visitMethodInsn(opcode, owner, name, descriptor); |
| return; |
| } |
| if (mv != null) { |
| mv.visitMethodInsn(opcode & ~Opcodes.SOURCE_MASK, owner, name, descriptor, isInterface); |
| } |
| } |
| |
| /** |
| * Visits an invokedynamic instruction. |
| * |
| * @param name the method's name. |
| * @param descriptor the method's descriptor (see {@link Type}). |
| * @param bootstrapMethodHandle the bootstrap method. |
| * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be |
| * an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link |
| * Type}, {@link Handle} or {@link ConstantDynamic} value. This method is allowed to modify |
| * the content of the array so a caller should expect that this array may change. |
| */ |
| public void visitInvokeDynamicInsn( |
| final String name, |
| final String descriptor, |
| final Handle bootstrapMethodHandle, |
| final Object... bootstrapMethodArguments) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| mv.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments); |
| } |
| } |
| |
| /** |
| * Visits a jump instruction. A jump instruction is an instruction that may jump to another |
| * instruction. |
| * |
| * @param opcode the opcode of the type instruction to be visited. This opcode is either IFEQ, |
| * IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, |
| * IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL. |
| * @param label the operand of the instruction to be visited. This operand is a label that |
| * designates the instruction to which the jump instruction may jump. |
| */ |
| public void visitJumpInsn(final int opcode, final Label label) { |
| if (mv != null) { |
| mv.visitJumpInsn(opcode, label); |
| } |
| } |
| |
| /** |
| * Visits a label. A label designates the instruction that will be visited just after it. |
| * |
| * @param label a {@link Label} object. |
| */ |
| public void visitLabel(final Label label) { |
| if (mv != null) { |
| mv.visitLabel(label); |
| } |
| } |
| |
| // ----------------------------------------------------------------------------------------------- |
| // Special instructions |
| // ----------------------------------------------------------------------------------------------- |
| |
| /** |
| * Visits a LDC instruction. Note that new constant types may be added in future versions of the |
| * Java Virtual Machine. To easily detect new constant types, implementations of this method |
| * should check for unexpected constant types, like this: |
| * |
| * <pre> |
| * if (cst instanceof Integer) { |
| * // ... |
| * } else if (cst instanceof Float) { |
| * // ... |
| * } else if (cst instanceof Long) { |
| * // ... |
| * } else if (cst instanceof Double) { |
| * // ... |
| * } else if (cst instanceof String) { |
| * // ... |
| * } else if (cst instanceof Type) { |
| * int sort = ((Type) cst).getSort(); |
| * if (sort == Type.OBJECT) { |
| * // ... |
| * } else if (sort == Type.ARRAY) { |
| * // ... |
| * } else if (sort == Type.METHOD) { |
| * // ... |
| * } else { |
| * // throw an exception |
| * } |
| * } else if (cst instanceof Handle) { |
| * // ... |
| * } else if (cst instanceof ConstantDynamic) { |
| * // ... |
| * } else { |
| * // throw an exception |
| * } |
| * </pre> |
| * |
| * @param value the constant to be loaded on the stack. This parameter must be a non null {@link |
| * Integer}, a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link |
| * Type} of OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is |
| * 49, a {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle |
| * constants, for classes whose version is 51 or a {@link ConstantDynamic} for a constant |
| * dynamic for classes whose version is 55. |
| */ |
| public void visitLdcInsn(final Object value) { |
| if (api < Opcodes.ASM5 |
| && (value instanceof Handle |
| || (value instanceof Type && ((Type) value).getSort() == Type.METHOD))) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (api < Opcodes.ASM7 && value instanceof ConstantDynamic) { |
| throw new UnsupportedOperationException("This feature requires ASM7"); |
| } |
| if (mv != null) { |
| mv.visitLdcInsn(value); |
| } |
| } |
| |
| /** |
| * Visits an IINC instruction. |
| * |
| * @param var index of the local variable to be incremented. |
| * @param increment amount to increment the local variable by. |
| */ |
| public void visitIincInsn(final int var, final int increment) { |
| if (mv != null) { |
| mv.visitIincInsn(var, increment); |
| } |
| } |
| |
| /** |
| * Visits a TABLESWITCH instruction. |
| * |
| * @param min the minimum key value. |
| * @param max the maximum key value. |
| * @param dflt beginning of the default handler block. |
| * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the |
| * handler block for the {@code min + i} key. |
| */ |
| public void visitTableSwitchInsn( |
| final int min, final int max, final Label dflt, final Label... labels) { |
| if (mv != null) { |
| mv.visitTableSwitchInsn(min, max, dflt, labels); |
| } |
| } |
| |
| /** |
| * Visits a LOOKUPSWITCH instruction. |
| * |
| * @param dflt beginning of the default handler block. |
| * @param keys the values of the keys. |
| * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the |
| * handler block for the {@code keys[i]} key. |
| */ |
| public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) { |
| if (mv != null) { |
| mv.visitLookupSwitchInsn(dflt, keys, labels); |
| } |
| } |
| |
| /** |
| * Visits a MULTIANEWARRAY instruction. |
| * |
| * @param descriptor an array type descriptor (see {@link Type}). |
| * @param numDimensions the number of dimensions of the array to allocate. |
| */ |
| public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) { |
| if (mv != null) { |
| mv.visitMultiANewArrayInsn(descriptor, numDimensions); |
| } |
| } |
| |
| /** |
| * Visits an annotation on an instruction. This method must be called just <i>after</i> the |
| * annotated instruction. It can be called several times for the same instruction. |
| * |
| * @param typeRef a reference to the annotated type. The sort of this type reference must be |
| * {@link TypeReference#INSTANCEOF}, {@link TypeReference#NEW}, {@link |
| * TypeReference#CONSTRUCTOR_REFERENCE}, {@link TypeReference#METHOD_REFERENCE}, {@link |
| * TypeReference#CAST}, {@link TypeReference#CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link |
| * TypeReference#METHOD_INVOCATION_TYPE_ARGUMENT}, {@link |
| * TypeReference#CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link |
| * TypeReference#METHOD_REFERENCE_TYPE_ARGUMENT}. See {@link TypeReference}. |
| * @param typePath the path to the annotated type argument, wildcard bound, array element type, or |
| * static inner type within 'typeRef'. May be {@literal null} if the annotation targets |
| * 'typeRef' as a whole. |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitInsnAnnotation( |
| final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| return mv.visitInsnAnnotation(typeRef, typePath, descriptor, visible); |
| } |
| return null; |
| } |
| |
| // ----------------------------------------------------------------------------------------------- |
| // Exceptions table entries, debug information, max stack and max locals |
| // ----------------------------------------------------------------------------------------------- |
| |
| /** |
| * Visits a try catch block. |
| * |
| * @param start the beginning of the exception handler's scope (inclusive). |
| * @param end the end of the exception handler's scope (exclusive). |
| * @param handler the beginning of the exception handler's code. |
| * @param type the internal name of the type of exceptions handled by the handler, or {@literal |
| * null} to catch any exceptions (for "finally" blocks). |
| * @throws IllegalArgumentException if one of the labels has already been visited by this visitor |
| * (by the {@link #visitLabel} method). |
| */ |
| public void visitTryCatchBlock( |
| final Label start, final Label end, final Label handler, final String type) { |
| if (mv != null) { |
| mv.visitTryCatchBlock(start, end, handler, type); |
| } |
| } |
| |
| /** |
| * Visits an annotation on an exception handler type. This method must be called <i>after</i> the |
| * {@link #visitTryCatchBlock} for the annotated exception handler. It can be called several times |
| * for the same exception handler. |
| * |
| * @param typeRef a reference to the annotated type. The sort of this type reference must be |
| * {@link TypeReference#EXCEPTION_PARAMETER}. See {@link TypeReference}. |
| * @param typePath the path to the annotated type argument, wildcard bound, array element type, or |
| * static inner type within 'typeRef'. May be {@literal null} if the annotation targets |
| * 'typeRef' as a whole. |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitTryCatchAnnotation( |
| final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| return mv.visitTryCatchAnnotation(typeRef, typePath, descriptor, visible); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits a local variable declaration. |
| * |
| * @param name the name of a local variable. |
| * @param descriptor the type descriptor of this local variable. |
| * @param signature the type signature of this local variable. May be {@literal null} if the local |
| * variable type does not use generic types. |
| * @param start the first instruction corresponding to the scope of this local variable |
| * (inclusive). |
| * @param end the last instruction corresponding to the scope of this local variable (exclusive). |
| * @param index the local variable's index. |
| * @throws IllegalArgumentException if one of the labels has not already been visited by this |
| * visitor (by the {@link #visitLabel} method). |
| */ |
| public void visitLocalVariable( |
| final String name, |
| final String descriptor, |
| final String signature, |
| final Label start, |
| final Label end, |
| final int index) { |
| if (mv != null) { |
| mv.visitLocalVariable(name, descriptor, signature, start, end, index); |
| } |
| } |
| |
| /** |
| * Visits an annotation on a local variable type. |
| * |
| * @param typeRef a reference to the annotated type. The sort of this type reference must be |
| * {@link TypeReference#LOCAL_VARIABLE} or {@link TypeReference#RESOURCE_VARIABLE}. See {@link |
| * TypeReference}. |
| * @param typePath the path to the annotated type argument, wildcard bound, array element type, or |
| * static inner type within 'typeRef'. May be {@literal null} if the annotation targets |
| * 'typeRef' as a whole. |
| * @param start the fist instructions corresponding to the continuous ranges that make the scope |
| * of this local variable (inclusive). |
| * @param end the last instructions corresponding to the continuous ranges that make the scope of |
| * this local variable (exclusive). This array must have the same size as the 'start' array. |
| * @param index the local variable's index in each range. This array must have the same size as |
| * the 'start' array. |
| * @param descriptor the class descriptor of the annotation class. |
| * @param visible {@literal true} if the annotation is visible at runtime. |
| * @return a visitor to visit the annotation values, or {@literal null} if this visitor is not |
| * interested in visiting this annotation. |
| */ |
| public AnnotationVisitor visitLocalVariableAnnotation( |
| final int typeRef, |
| final TypePath typePath, |
| final Label[] start, |
| final Label[] end, |
| final int[] index, |
| final String descriptor, |
| final boolean visible) { |
| if (api < Opcodes.ASM5) { |
| throw new UnsupportedOperationException(REQUIRES_ASM5); |
| } |
| if (mv != null) { |
| return mv.visitLocalVariableAnnotation( |
| typeRef, typePath, start, end, index, descriptor, visible); |
| } |
| return null; |
| } |
| |
| /** |
| * Visits a line number declaration. |
| * |
| * @param line a line number. This number refers to the source file from which the class was |
| * compiled. |
| * @param start the first instruction corresponding to this line number. |
| * @throws IllegalArgumentException if {@code start} has not already been visited by this visitor |
| * (by the {@link #visitLabel} method). |
| */ |
| public void visitLineNumber(final int line, final Label start) { |
| if (mv != null) { |
| mv.visitLineNumber(line, start); |
| } |
| } |
| |
| /** |
| * Visits the maximum stack size and the maximum number of local variables of the method. |
| * |
| * @param maxStack maximum stack size of the method. |
| * @param maxLocals maximum number of local variables for the method. |
| */ |
| public void visitMaxs(final int maxStack, final int maxLocals) { |
| if (mv != null) { |
| mv.visitMaxs(maxStack, maxLocals); |
| } |
| } |
| |
| /** |
| * Visits the end of the method. This method, which is the last one to be called, is used to |
| * inform the visitor that all the annotations and attributes of the method have been visited. |
| */ |
| public void visitEnd() { |
| if (mv != null) { |
| mv.visitEnd(); |
| } |
| } |
| } |