io.micronaut.data.processor.visitors.finders

Class ProjectionMethodExpression

java.lang.Object

io.micronaut.data.processor.visitors.finders.ProjectionMethodExpression

Direct Known Subclasses:

ProjectionMethodExpression.Distinct, ProjectionMethodExpression.Property

public abstract class ProjectionMethodExpression
extends java.lang.Object

Method expression for performing a projection of some sort.

Since:

1.0

Author:

graemerocher

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ProjectionMethodExpression.Avg Avg projection.
static class	ProjectionMethodExpression.Distinct The distinct projection creator.
static class	ProjectionMethodExpression.Max Max projection.
static class	ProjectionMethodExpression.Min Min projection.
static class	ProjectionMethodExpression.Property The property projection.
static class	ProjectionMethodExpression.Sum Sum projection.

Method Summary

Modifier and Type	Method and Description
protected abstract void	apply(MethodMatchContext matchContext, QueryModel query) Apply the projection to the query object.
abstract io.micronaut.inject.ast.ClassElement	getExpectedResultType()
int	getRequiredProperties()
protected ProjectionMethodExpression	init(MethodMatchContext matchContext, java.lang.String projectionDefinition) Creates the projection or returns null if an error occurred reporting the error to the visitor context.
protected abstract ProjectionMethodExpression	initProjection(MethodMatchContext matchContext, java.lang.String remaining) Initialize the projection, returning null if it cannot be initialized.
static ProjectionMethodExpression	matchProjection(MethodMatchContext matchContext, java.lang.String projection) Match a projection.

Methods inherited from class java.lang.Object

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

Method Detail

matchProjection

@Nullable
public static ProjectionMethodExpression matchProjection(@NonNull
                                                                   MethodMatchContext matchContext,
                                                                   @NonNull
                                                                   java.lang.String projection)

Match a projection.

Parameters:

matchContext - The context

projection - The projection to match

Returns:

An expression or null if no match is possible or an error occurred.

init

@Nullable
protected final ProjectionMethodExpression init(@NonNull
                                                          MethodMatchContext matchContext,
                                                          @NonNull
                                                          java.lang.String projectionDefinition)

Creates the projection or returns null if an error occurred reporting the error to the visitor context.

Parameters:

matchContext - The visitor context

projectionDefinition - The projection definition

Returns:

The projection

initProjection

@Nullable
protected abstract ProjectionMethodExpression initProjection(@NonNull
                                                                       MethodMatchContext matchContext,
                                                                       @Nullable
                                                                       java.lang.String remaining)

Initialize the projection, returning null if it cannot be initialized.

Parameters:

matchContext - The match context

remaining - The remaing projection string

Returns:

The projection method expression

apply

protected abstract void apply(@NonNull
                              MethodMatchContext matchContext,
                              @NonNull
                              QueryModel query)

Apply the projection to the query object.

Parameters:

matchContext - The match context.

query - The query object.

getRequiredProperties

public int getRequiredProperties()

Returns:

The arguments required to satisfy this projection.

getExpectedResultType

@NonNull
public abstract io.micronaut.inject.ast.ClassElement getExpectedResultType()

Returns:

The expected result type