groovy.beans
Class BindableASTTransformation

java.lang.Object
  groovy.beans.BindableASTTransformation

All Implemented Interfaces:

ASTTransformation, org.objectweb.asm.Opcodes

Direct Known Subclasses:

VetoableASTTransformation

public class BindableASTTransformation
extends Object
implements ASTTransformation, org.objectweb.asm.Opcodes

Handles generation of code for the @Bindable annotation when @Vetoable is not present.

Generally, it adds (if needed) a PropertyChangeSupport field and the needed add/removePropertyChangeListener methods to support the listeners.

It also generates the setter and wires the setter through the PropertyChangeSupport.

If a Vetoable annotaton is detected it does nothing and lets the VetoableASTTransformation handle all the changes.

Author:

Danno Ferrin (shemnon), Chris Reeves

Field Summary

protected static ClassNode	boundClassNode
protected ClassNode	pcsClassNode

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, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, 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, 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, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, 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, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6

Constructor Summary

BindableASTTransformation()

Method Summary

protected void	addPropertyChangeSupport(ClassNode declaringClass) Adds the necessary field and methods to support property change support.
protected Statement	createBindableStatement(PropertyNode propertyNode, Expression fieldExpression) Creates a statement body similar to: this.firePropertyChange("field", field, field = value)
protected void	createSetterMethod(ClassNode declaringClass, PropertyNode propertyNode, String setterName, Statement setterBlock) Creates a setter method with the given body.
static boolean	hasBindableAnnotation(AnnotatedNode node) Convenience method to see if an annotated node is @Bindable.
protected boolean	needsPropertyChangeSupport(ClassNode declaringClass, SourceUnit sourceUnit) Snoops through the declaring class and all parents looking for methods void addPropertyChangeListener(PropertyChangeListener), void removePropertyChangeListener(PropertyChangeListener), and void firePropertyChange(String, Object, Object).
void	visit(ASTNode[] nodes, SourceUnit source) Handles the bulk of the processing, mostly delegating to other methods.

Methods inherited from class java.lang.Object

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

Field Detail

boundClassNode

protected static ClassNode boundClassNode

pcsClassNode

protected ClassNode pcsClassNode

Constructor Detail

BindableASTTransformation

public BindableASTTransformation()

Method Detail

hasBindableAnnotation

public static boolean hasBindableAnnotation(AnnotatedNode node)

Convenience method to see if an annotated node is @Bindable.

Parameters:

node - the node to check

Returns:

true if the node is bindable

visit

public void visit(ASTNode[] nodes,
                  SourceUnit source)

Handles the bulk of the processing, mostly delegating to other methods.

Specified by:

visit in interface ASTTransformation

Parameters:

nodes - the ast nodes

source - the source unit for the nodes

createBindableStatement

protected Statement createBindableStatement(PropertyNode propertyNode,
                                            Expression fieldExpression)

Creates a statement body similar to: this.firePropertyChange("field", field, field = value)

Parameters:

propertyNode - the field node for the property

fieldExpression - a field expression for setting the property value

Returns:

the created statement

createSetterMethod

protected void createSetterMethod(ClassNode declaringClass,
                                  PropertyNode propertyNode,
                                  String setterName,
                                  Statement setterBlock)

Creates a setter method with the given body.

Parameters:

declaringClass - the class to which we will add the setter

propertyNode - the field to back the setter

setterName - the name of the setter

setterBlock - the statement representing the setter block

needsPropertyChangeSupport

protected boolean needsPropertyChangeSupport(ClassNode declaringClass,
                                             SourceUnit sourceUnit)

Snoops through the declaring class and all parents looking for methods void addPropertyChangeListener(PropertyChangeListener), void removePropertyChangeListener(PropertyChangeListener), and void firePropertyChange(String, Object, Object). If any are defined all must be defined or a compilation error results.

Parameters:

declaringClass - the class to search

sourceUnit - the source unit, for error reporting. @NotNull.

Returns:

true if property change support should be added

addPropertyChangeSupport

protected void addPropertyChangeSupport(ClassNode declaringClass)

Adds the necessary field and methods to support property change support.

Adds a new field: protected final java.beans.PropertyChangeSupport this$PropertyChangeSupport = new java.beans.PropertyChangeSupport(this)"

Also adds support methods: public void addPropertyChangeListener(java.beans.PropertyChangeListener) public void addPropertyChangeListener(String, java.beans.PropertyChangeListener) public void removePropertyChangeListener(java.beans.PropertyChangeListener) public void removePropertyChangeListener(String, java.beans.PropertyChangeListener) public java.beans.PropertyChangeListener[] getPropertyChangeListeners()

Parameters:

declaringClass - the class to which we add the support field and methods