com.avaje.ebean.enhance.agent

Class FieldMeta

java.lang.Object

com.avaje.ebean.enhance.agent.FieldMeta

All Implemented Interfaces:

EnhanceConstants, Opcodes

public class FieldMeta
extends Object
implements Opcodes, EnhanceConstants

Holds meta data for a field.

This can then generate the appropriate byte code for this field.

Field Summary

Fields inherited from interface com.avaje.ebean.enhance.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, 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, ASM4, ASM5, 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, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, 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, 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, V1_8

Fields inherited from interface com.avaje.ebean.enhance.agent.EnhanceConstants

AVAJE_TRANSACTIONAL_ANNOTATION, C_BEANCOLLECTION, C_ENHANCEDTRANSACTIONAL, C_ENTITYBEAN, C_GROOVYOBJECT, C_INTERCEPT, C_PERSISTBATCH, C_SCALAOBJECT, C_TXISOLATION, C_TXSCOPE, C_TXTYPE, DOCSTORE_ANNOTATION, EBEAN_MODEL, EBEAN_PREFIX, EMBEDDABLE_ANNOTATION, ENTITY_ANNOTATION, IDENTITY_FIELD, INTERCEPT_FIELD, JAVAX_PERSISTENCE, L_EMBEDDEDCOLUMNS, L_HELPSCOPETRANS, L_INTERCEPT, L_SCOPETRANS, MAPPEDSUPERCLASS_ANNOTATION

Constructor Summary

Constructors

Constructor and Description
FieldMeta(ClassMeta classMeta, String name, String desc, String fieldClass) Construct based on field name and desc from reading byte code.

Method Summary

Modifier and Type	Method and Description
protected void	addAnnotationDesc(String desc) Add a field annotation.
void	addGetSetMethods(ClassVisitor cv, ClassMeta classMeta) Add get and set methods for field access/interception.
void	appendCompare(MethodVisitor mv, ClassMeta classMeta) Append compare instructions if its a long, float or double.
void	appendGetPrimitiveIdValue(MethodVisitor mv, ClassMeta classMeta) Append byte code to return the Id value (for primitives).
void	appendSwitchGet(MethodVisitor mv, ClassMeta classMeta, boolean intercept) As part of the switch statement to read the fields generate the get code.
void	appendSwitchSet(MethodVisitor mv, ClassMeta classMeta, boolean intercept)
void	appendValueOf(MethodVisitor mv) Append code to get the Object value of a primitive.
String	getDesc() Return the field bytecode type description.
String	getFieldName() Return the field name.
String	getName() Return the field name.
boolean	isEmbedded() Return true if this is an Embedded field.
boolean	isId() Return true if this is an ID field.
boolean	isLocalField(ClassMeta classMeta) Return true if the field is local to this class.
boolean	isMany() Return true if this is a OneToMany or ManyToMany field.
boolean	isManyToMany()
boolean	isObjectArray() Return true if this field type is an Array of Objects.
boolean	isPersistent() Return true is this is a persistent field.
boolean	isPrimitiveType() Return true if this is a primitiveType.
boolean	isTransient() Return true if this is a transient field.
void	setIndexPosition(int indexPosition)
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FieldMeta

public FieldMeta(ClassMeta classMeta,
                 String name,
                 String desc,
                 String fieldClass)

Construct based on field name and desc from reading byte code.

Used for reading local fields (not inherited) via visiting the class bytes.

Method Detail

setIndexPosition

public void setIndexPosition(int indexPosition)

toString

public String toString()

Overrides:

toString in class Object

getFieldName

public String getFieldName()

Return the field name.

isPrimitiveType

public boolean isPrimitiveType()

Return true if this is a primitiveType.

addAnnotationDesc

protected void addAnnotationDesc(String desc)

Add a field annotation.

getName

public String getName()

Return the field name.

getDesc

public String getDesc()

Return the field bytecode type description.

isObjectArray

public boolean isObjectArray()

Return true if this field type is an Array of Objects.

We can not support Object Arrays for field types.

isPersistent

public boolean isPersistent()

Return true is this is a persistent field.

isTransient

public boolean isTransient()

Return true if this is a transient field.

isId

public boolean isId()

Return true if this is an ID field.

ID fields are used in generating equals() logic based on identity.

isMany

public boolean isMany()

Return true if this is a OneToMany or ManyToMany field.

isManyToMany

public boolean isManyToMany()

isEmbedded

public boolean isEmbedded()

Return true if this is an Embedded field.

isLocalField

public boolean isLocalField(ClassMeta classMeta)

Return true if the field is local to this class. Returns false if the field is actually on a super class.

appendGetPrimitiveIdValue

public void appendGetPrimitiveIdValue(MethodVisitor mv,
                                      ClassMeta classMeta)

Append byte code to return the Id value (for primitives).

appendCompare

public void appendCompare(MethodVisitor mv,
                          ClassMeta classMeta)

Append compare instructions if its a long, float or double.

appendValueOf

public void appendValueOf(MethodVisitor mv)

Append code to get the Object value of a primitive.

This becomes a Integer.valueOf(someInt); or similar.

appendSwitchGet

public void appendSwitchGet(MethodVisitor mv,
                            ClassMeta classMeta,
                            boolean intercept)

As part of the switch statement to read the fields generate the get code.

appendSwitchSet

public void appendSwitchSet(MethodVisitor mv,
                            ClassMeta classMeta,
                            boolean intercept)

addGetSetMethods

public void addGetSetMethods(ClassVisitor cv,
                             ClassMeta classMeta)

Add get and set methods for field access/interception.