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oracle.jbo
Class AbstractExprCompileContextImpl

java.lang.Object
groovy.lang.GroovyObjectSupport
groovy.lang.Binding
oracle.jbo.AbstractExprCompileContextImpl

All Implemented Interfaces:

groovy.lang.GroovyObject, ExprCompileContext

public abstract class AbstractExprCompileContextImpl

extends groovy.lang.Binding

implements ExprCompileContext

An abstract version of an ExprCompileContext. The abstract context implements a strategy patter for method and variable resolution that is based upon the strategy that is used at script execute time.

Many of the abstract methods defined by this class are designed to return information about the compile context source. This source object usually represents the BC4J owner of the script that is compiling. At execute time it is frequently implemented by an oracle.jbo.Row. At compile time it is exepcted that it will be represented by a BC4J def object or its DT equivalent.

Note that many of the typing methods deal with String types rather than the type classes. This is intentional. Type classes are not available in all compile contexts (DT).

Since:

release specific (what release of product did this appear in)

Constructor Summary

AbstractExprCompileContextImpl()

Method Summary

abstract boolean	canTypeCheck() Returns whether this compile context can be used for type checking.
protected java.lang.Class[]	classesFor(java.lang.String[] types)
protected java.lang.Class	classFor(java.lang.String type)
abstract ExprDef	getExprDef() Return the definition of the expressio that is compiling.
abstract groovy.lang.Script	getGlobalScript()
java.lang.String	getMethodReturnType(java.lang.String receiver, java.lang.String name, java.lang.String... argtypes) Return the return type of the given method.
abstract java.lang.String	getNewValueType() In validator contexts this returns the type of the new attribute or row.
abstract java.lang.String	getOldValueType() In validator contexts this returns the type of the new attribute or row.
abstract groovy.lang.Script	getOperationsScript() Return the operations script for the current compile context.
java.lang.String	getPropertyType(java.lang.String objectType, java.lang.String name) Return the type of the given property.
protected java.lang.String	getReturnType(java.lang.Class receiver, java.lang.String name, java.lang.Class... argtypes)
protected java.lang.String	getReturnType(java.lang.String receiverType, java.lang.String name, java.lang.String... argtypes) Get the return type of the specified method on the specified receiver type.
abstract java.lang.String	getSourceAttributeType(java.lang.String name) Return the source attribute type.
abstract java.lang.String	getSourceMethodReturnType(java.lang.String name, java.lang.String... argtypes) Return the return type of a source method.
abstract java.lang.String	getSourcePropertyType(java.lang.String name) Return the source property type.
abstract java.lang.String	getSourceType() Return the source type of the current compile context.
java.lang.String	getVariableType(java.lang.String name) Return the type of the given variable.
protected boolean	isAssignableFrom(java.lang.Class intrf, java.lang.String type) Determines if the specified interface class is assignable from the type.
protected void	setNestedContext(ExprCompileContext nestedContext) May be used to define a nested context in which future ADF properties/methods may be evaluated.

Methods inherited from class groovy.lang.Binding

getProperty, getVariable, getVariables, hasVariable, setProperty, setVariable

Methods inherited from class groovy.lang.GroovyObjectSupport

getMetaClass, invokeMethod, setMetaClass

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.jbo.ExprCompileContext

getEnclosingContext, getErrorCollector, getExprTrustSupplier, getGlobalOperationReturnType, isRowAttribute, setErrorCollector

Constructor Detail

AbstractExprCompileContextImpl

public AbstractExprCompileContextImpl()

Method Detail

getExprDef

public abstract ExprDef getExprDef()

Description copied from interface: ExprCompileContext

Return the definition of the expressio that is compiling.

Specified by:

getExprDef in interface ExprCompileContext

canTypeCheck

public abstract boolean canTypeCheck()

Description copied from interface: ExprCompileContext

Returns whether this compile context can be used for type checking.

Specified by:

canTypeCheck in interface ExprCompileContext

getPropertyType

public java.lang.String getPropertyType(java.lang.String objectType,
                                        java.lang.String name)

Description copied from interface: ExprCompileContext

Return the type of the given property.

Invoked by the type checker if it cannot resolve the specifid property.

Specified by:

getPropertyType in interface ExprCompileContext

getVariableType

public java.lang.String getVariableType(java.lang.String name)

Description copied from interface: ExprCompileContext

Return the type of the given variable.

Invoked by the type checker if it cannot resolve the specified variable.

Specified by:

getVariableType in interface ExprCompileContext

getMethodReturnType

public java.lang.String getMethodReturnType(java.lang.String receiver,
                                            java.lang.String name,
                                            java.lang.String... argtypes)

Description copied from interface: ExprCompileContext

Return the return type of the given method.

Invoked by the type checker if it cannot resolve the specified method.

Specified by:

getMethodReturnType in interface ExprCompileContext

setNestedContext

protected void setNestedContext(ExprCompileContext nestedContext)

May be used to define a nested context in which future ADF properties/methods may be evaluated. The nested context will be cleared whenever a new unresolved variable is detected.

The nested context may be used to store the structure of a BC4J association so that properties of the association may be resolved. For example, in an emp context the nested context could be used to resolve the Emps property in the expression 'Dept.Emps'.

getGlobalScript

public abstract groovy.lang.Script getGlobalScript()

getOperationsScript

public abstract groovy.lang.Script getOperationsScript()

Return the operations script for the current compile context. This is usually defined by the owner of the script that is compiling.

getSourceType

public abstract java.lang.String getSourceType()

Return the source type of the current compile context.

getSourceAttributeType

public abstract java.lang.String getSourceAttributeType(java.lang.String name)

Return the source attribute type. Many sources like a ViewObject definition may define named attributes. This returns the type of a named attribute.

getSourcePropertyType

public abstract java.lang.String getSourcePropertyType(java.lang.String name)

Return the source property type. This is usually a bean property of the source.

getSourceMethodReturnType

public abstract java.lang.String getSourceMethodReturnType(java.lang.String name,
                                                           java.lang.String... argtypes)

Return the return type of a source method. Many sources may also define custom interfaces (like a row class). This returns the return type of a source's custom interface.

getNewValueType

public abstract java.lang.String getNewValueType()

In validator contexts this returns the type of the new attribute or row.

getOldValueType

public abstract java.lang.String getOldValueType()

In validator contexts this returns the type of the new attribute or row.

getReturnType

protected java.lang.String getReturnType(java.lang.String receiverType,
                                         java.lang.String name,
                                         java.lang.String... argtypes)

Get the return type of the specified method on the specified receiver type.

The default implementation uses the groovy MOP to find the method on the receiver class. Concrete implementations may override this method if the receiver class is not available.

Parameters:

receiverType - the type of the Object that will receive the method invocation

name - the name of the method that will be invoked

argtypes - the types of arguments that will be passed

getReturnType

protected java.lang.String getReturnType(java.lang.Class receiver,
                                         java.lang.String name,
                                         java.lang.Class... argtypes)

isAssignableFrom

protected boolean isAssignableFrom(java.lang.Class intrf,
                                   java.lang.String type)

Determines if the specified interface class is assignable from the type.

The assignable rules should be java.lang.Class. The default implementation looks up the Class to determine if it is assignable. Concrete implementations that may not have the type Class available may override this to perform there own checking.

Parameters:

intrf - the interface to check for

type - the type to be checked

classFor

protected java.lang.Class classFor(java.lang.String type)

classesFor

protected java.lang.Class[] classesFor(java.lang.String[] types)

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