org.eclipse.persistence.internal.jpa.weaving

Class MethodWeaver

java.lang.Object

org.objectweb.asm.MethodAdapter

org.eclipse.persistence.internal.jpa.weaving.MethodWeaver

All Implemented Interfaces:

org.objectweb.asm.MethodVisitor, org.objectweb.asm.Opcodes

public class MethodWeaver
extends org.objectweb.asm.MethodAdapter
implements org.objectweb.asm.Opcodes

Processes all the methods of a class to weave in persistence code such as, lazy value holder, change tracking and fetch groups. For FIELD access, changes references to GETFIELD and PUTFIELD to call weaved get/set methods. For Property access, modifies the getters and setters.

Field Summary

Fields inherited from interface org.objectweb.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEDYNAMIC_OWNER, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7

Constructor Summary

Constructors

Constructor and Description
MethodWeaver(ClassWeaver tcw, java.lang.String methodName, java.lang.String methodDescriptor, org.objectweb.asm.MethodVisitor mv)

Method Summary

Modifier and Type	Method and Description
void	visitAttribute(org.objectweb.asm.Attribute attr)
void	visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
void	visitIincInsn(int var, int increment)
void	visitInsn(int opcode)
void	visitIntInsn(int opcode, int operand)
void	visitJumpInsn(int opcode, org.objectweb.asm.Label label)
void	visitLabel(org.objectweb.asm.Label label)
void	visitLdcInsn(java.lang.Object cst)
void	visitLineNumber(int line, org.objectweb.asm.Label start)
void	visitLocalVariable(java.lang.String name, java.lang.String desc, java.lang.String signature, org.objectweb.asm.Label start, org.objectweb.asm.Label end, int index)
void	visitLookupSwitchInsn(org.objectweb.asm.Label dflt, int[] keys, org.objectweb.asm.Label[] labels)
void	visitMaxs(int maxStack, int maxLocals)
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc)
void	visitMultiANewArrayInsn(java.lang.String desc, int dims)
void	visitTableSwitchInsn(int min, int max, org.objectweb.asm.Label dflt, org.objectweb.asm.Label[] labels)
void	visitTryCatchBlock(org.objectweb.asm.Label start, org.objectweb.asm.Label end, org.objectweb.asm.Label handler, java.lang.String type)
void	visitTypeInsn(int opcode, java.lang.String desc)
void	visitVarInsn(int opcode, int var)
void	weaveAttributesIfRequired(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc) Change GETFIELD and PUTFIELD for fields that use attribute access to make use of new convenience methods.
void	weaveBeginningOfMethodIfRequired() Makes modifications to the beginning of a method.
void	weaveEndOfMethodIfRequired() Modifies methods just before the return.

Methods inherited from class org.objectweb.asm.MethodAdapter

visitAnnotation, visitAnnotationDefault, visitCode, visitEnd, visitFrame, visitParameterAnnotation

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MethodWeaver

public MethodWeaver(ClassWeaver tcw,
                    java.lang.String methodName,
                    java.lang.String methodDescriptor,
                    org.objectweb.asm.MethodVisitor mv)

Method Detail

visitInsn

public void visitInsn(int opcode)

Specified by:

visitInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitInsn in class org.objectweb.asm.MethodAdapter

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

Specified by:

visitIntInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitIntInsn in class org.objectweb.asm.MethodAdapter

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

Specified by:

visitVarInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitVarInsn in class org.objectweb.asm.MethodAdapter

visitTypeInsn

public void visitTypeInsn(int opcode,
                          java.lang.String desc)

Specified by:

visitTypeInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitTypeInsn in class org.objectweb.asm.MethodAdapter

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String desc)

Specified by:

visitFieldInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitFieldInsn in class org.objectweb.asm.MethodAdapter

visitMethodInsn

public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String desc)

Specified by:

visitMethodInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitMethodInsn in class org.objectweb.asm.MethodAdapter

visitJumpInsn

public void visitJumpInsn(int opcode,
                          org.objectweb.asm.Label label)

Specified by:

visitJumpInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitJumpInsn in class org.objectweb.asm.MethodAdapter

visitLabel

public void visitLabel(org.objectweb.asm.Label label)

Specified by:

visitLabel in interface org.objectweb.asm.MethodVisitor

Overrides:

visitLabel in class org.objectweb.asm.MethodAdapter

visitLdcInsn

public void visitLdcInsn(java.lang.Object cst)

Specified by:

visitLdcInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitLdcInsn in class org.objectweb.asm.MethodAdapter

visitIincInsn

public void visitIincInsn(int var,
                          int increment)

Specified by:

visitIincInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitIincInsn in class org.objectweb.asm.MethodAdapter

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 org.objectweb.asm.Label dflt,
                                 org.objectweb.asm.Label[] labels)

Specified by:

visitTableSwitchInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitTableSwitchInsn in class org.objectweb.asm.MethodAdapter

visitLookupSwitchInsn

public void visitLookupSwitchInsn(org.objectweb.asm.Label dflt,
                                  int[] keys,
                                  org.objectweb.asm.Label[] labels)

Specified by:

visitLookupSwitchInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitLookupSwitchInsn in class org.objectweb.asm.MethodAdapter

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(java.lang.String desc,
                                    int dims)

Specified by:

visitMultiANewArrayInsn in interface org.objectweb.asm.MethodVisitor

Overrides:

visitMultiANewArrayInsn in class org.objectweb.asm.MethodAdapter

visitTryCatchBlock

public void visitTryCatchBlock(org.objectweb.asm.Label start,
                               org.objectweb.asm.Label end,
                               org.objectweb.asm.Label handler,
                               java.lang.String type)

Specified by:

visitTryCatchBlock in interface org.objectweb.asm.MethodVisitor

Overrides:

visitTryCatchBlock in class org.objectweb.asm.MethodAdapter

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

Specified by:

visitMaxs in interface org.objectweb.asm.MethodVisitor

Overrides:

visitMaxs in class org.objectweb.asm.MethodAdapter

visitLocalVariable

public void visitLocalVariable(java.lang.String name,
                               java.lang.String desc,
                               java.lang.String signature,
                               org.objectweb.asm.Label start,
                               org.objectweb.asm.Label end,
                               int index)

Specified by:

visitLocalVariable in interface org.objectweb.asm.MethodVisitor

Overrides:

visitLocalVariable in class org.objectweb.asm.MethodAdapter

visitLineNumber

public void visitLineNumber(int line,
                            org.objectweb.asm.Label start)

Specified by:

visitLineNumber in interface org.objectweb.asm.MethodVisitor

Overrides:

visitLineNumber in class org.objectweb.asm.MethodAdapter

visitAttribute

public void visitAttribute(org.objectweb.asm.Attribute attr)

Specified by:

visitAttribute in interface org.objectweb.asm.MethodVisitor

Overrides:

visitAttribute in class org.objectweb.asm.MethodAdapter

weaveAttributesIfRequired

public void weaveAttributesIfRequired(int opcode,
                                      java.lang.String owner,
                                      java.lang.String name,
                                      java.lang.String desc)

Change GETFIELD and PUTFIELD for fields that use attribute access to make use of new convenience methods. A GETFIELD for an attribute named 'variableName' will be replaced by a call to: _persistence_get_variableName() A PUTFIELD for an attribute named 'variableName' will be replaced by a call to: _persistence_set_variableName(variableName)

weaveBeginningOfMethodIfRequired

public void weaveBeginningOfMethodIfRequired()

Makes modifications to the beginning of a method. 1. Modifies getter method for attributes using property access In a getter method for 'attributeName', the following lines are added at the beginning of the method _persistence_checkFetched("attributeName"); _persistence_initialize_attributeName_vh(); if (!_persistence_attributeName_vh.isInstantiated()) { PropertyChangeListener temp_persistence_listener = _persistence_listener; _persistence_listener = null; setAttributeName((AttributeType)_persistence_attributeName_vh.getValue()); _persistence_listener = temp_persistence_listener; } 2. Modifies setter methods to store old value of attribute If weaving for fetch groups: // if weaving for change tracking: if(_persistence_listener != null) // for Objects AttributeType oldAttribute = getAttribute() // for primitives AttributeWrapperType oldAttribute = new AttributeWrapperType(getAttribute()); e.g. Double oldAttribute = new Double(getAttribute()); else _persistence_checkFetchedForSet("attributeName"); _persistence_propertyChange("attributeName", oldAttribute, argument); otherwise (not weaving for fetch groups): // for Objects AttributeType oldAttribute = getAttribute() // for primitives AttributeWrapperType oldAttribute = new AttributeWrapperType(getAttribute()); e.g. Double oldAttribute = new Double(getAttribute()); _persistence_propertyChange("attributeName", oldAttribute, argument); // if not weaving for change tracking, but for fetch groups only: _persistence_checkFetchedForSet("attributeName"); 3. Modifies getter Method for attributes using virtual access add: _persistence_checkFetched(name); 4. Modifies setter Method for attributes using virtual access add code of the following form: Object obj = null; if(_persistence_listener != null){ obj = get(name); } else { _persistence_checkFetchedForSet(name); } _persistence_propertyChange(name, obj, value); _persistence_checkFetchedForSet(name) call will be excluded if weaving of fetch groups is not enabled _persistence_propertyChange(name, obj, value); will be excluded if weaving of change tracking is not enabled

weaveEndOfMethodIfRequired

public void weaveEndOfMethodIfRequired()

Modifies methods just before the return. In a setter method for a LAZY mapping, for 'attributeName', the following lines are added at the end of the method. _persistence_initialize_attributeName_vh(); _persistence_attributeName_vh.setValue(argument); _persistence_attributeName_vh.setIsCoordinatedWithProperty(true); In a setter method for a non-LAZY mapping, the followings lines are added if change tracking is activated: _persistence_propertyChange("attributeName", oldAttribute, argument); Note: This code will wrap primitives by adding a call to the primitive constructor.