Package com.google.auto.value.extension.memoized.processor

Class MemoizeExtension

java.lang.Object

com.google.auto.value.extension.AutoValueExtension

com.google.auto.value.extension.memoized.processor.MemoizeExtension

@AutoService(AutoValueExtension.class)
public final class MemoizeExtension
extends AutoValueExtension

An extension that implements the Memoized contract.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.auto.value.extension.AutoValueExtension

AutoValueExtension.BuilderContext, AutoValueExtension.Context, AutoValueExtension.IncrementalExtensionType

Constructor Summary

Constructors

Constructor	Description
MemoizeExtension()

Method Summary

Modifier and Type	Method	Description
boolean	applicable(AutoValueExtension.Context context)	Determines whether this Extension applies to the given context.
String	generateClass(AutoValueExtension.Context context, String className, String classToExtend, boolean isFinal)	Returns the generated source code of the class named className to extend classToExtend, or null if this extension does not generate a class in the hierarchy.
AutoValueExtension.IncrementalExtensionType	incrementalType(ProcessingEnvironment processingEnvironment)	Determines the incremental type of this Extension.

Methods inherited from class com.google.auto.value.extension.AutoValueExtension

consumeBuilderMethods, consumeMethods, consumeProperties, getSupportedOptions, mustBeFinal

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoizeExtension

public MemoizeExtension()

Method Detail

incrementalType

public AutoValueExtension.IncrementalExtensionType incrementalType(ProcessingEnvironment processingEnvironment)

Description copied from class: AutoValueExtension

Determines the incremental type of this Extension.

The ProcessingEnvironment can be used, among other things, to obtain the processor options, using ProcessingEnvironment.getOptions().

The actual incremental type of the AutoValue processor as a whole will be the loosest incremental types of the Extensions present in the annotation processor path. The default returned value is AutoValueExtension.IncrementalExtensionType.UNKNOWN, which will disable incremental annotation processing entirely.

Overrides:

incrementalType in class AutoValueExtension

applicable

public boolean applicable(AutoValueExtension.Context context)

Description copied from class: AutoValueExtension

Determines whether this Extension applies to the given context. If an Extension returns false for a given class, it will not be called again during the processing of that class. An Extension can return true and still choose not to generate any code for the class, by returning null from AutoValueExtension.generateClass(com.google.auto.value.extension.AutoValueExtension.Context, java.lang.String, java.lang.String, boolean). That is often a more flexible approach.

Overrides:

applicable in class AutoValueExtension

Parameters:

context - The Context of the code generation for this class.

generateClass

public String generateClass(AutoValueExtension.Context context,
                            String className,
                            String classToExtend,
                            boolean isFinal)

Description copied from class: AutoValueExtension

Returns the generated source code of the class named className to extend classToExtend, or null if this extension does not generate a class in the hierarchy. If there is a generated class, it should be final if isFinal is true; otherwise it should be abstract. The returned string should be a complete Java class definition of the class className in the package context.packageName().

The returned string will typically look like this:

 package <package>;
 ...
 <finalOrAbstract> class <className> extends <classToExtend> {
   // Constructor
   <className>(<constructorParameters>) {
     super(<constructorParameterNames>);
     ...
   }
   ...
 }
 

Here, <package> is AutoValueExtension.Context.packageName(); <finalOrAbstract> is the keyword final if isFinal is true or abstract otherwise; and <className> and <classToExtend> are the values of this method's parameters of the same name. The <constructorParameters> and <constructorParameterNames> are typically derived from AutoValueExtension.Context.propertyTypes().

An extension can also generate a subclass of the nested Builder class if there is one. In that case, it should check if AutoValueExtension.BuilderContext.toBuilderMethods() is empty. If not, the Builder subclass should include a "copy constructor", like this:

 ...
 <finalOrAbstract> class <className> extends <classToExtend> {
   ...
   static class Builder extends <classToExtend>.Builder {
     Builder() {}
     Builder(<autoValueClass> copyFrom) {
       super(copyFrom);
     }
     ...
   }
 }
 

Here, <autoValueClass> is AutoValueExtension.Context.autoValueClass().}

Specified by:

generateClass in class AutoValueExtension

Parameters:

context - The AutoValueExtension.Context of the code generation for this class.

className - The simple name of the resulting class. The returned code will be written to a file named accordingly.

classToExtend - The simple name of the direct parent of the generated class. This could be the AutoValue generated class, or a class generated as the result of another Extension.

isFinal - True if this class is the last class in the chain, meaning it should be marked as final. Otherwise it should be marked as abstract.

Returns:

The source code of the generated class, or null if this extension does not generate a class in the hierarchy.