cascading.nested.core

Class NestedBaseBuildFunction<Node,Result>

java.lang.Object

cascading.operation.BaseOperation<Context>

cascading.nested.core.NestedBaseOperation<Node,Result,Context>

cascading.nested.core.NestedSpecBaseOperation<Node,Result,NestedBaseBuildFunction.Context>

cascading.nested.core.NestedBaseBuildFunction<Node,Result>

All Implemented Interfaces:

cascading.flow.planner.DeclaresResults, cascading.operation.Function<NestedBaseBuildFunction.Context>, cascading.operation.Operation<NestedBaseBuildFunction.Context>, cascading.util.Traceable, java.io.Serializable

public abstract class NestedBaseBuildFunction<Node,Result>
extends NestedSpecBaseOperation<Node,Result,NestedBaseBuildFunction.Context>
implements cascading.operation.Function<NestedBaseBuildFunction.Context>

Class NestedBaseBuildFunction is the base class for Function implementations that rely on the BuildSpec class when declaring transformations on nested object types.

Specifically, *BuildAsFunction and *BuildIntoFunction classes create or update (respectively) nested object types from Function argument Fields where the field values can be primitive types, objects (with a corresponding CoercibleType), or themselves nest object types.

In the case of a *BuildIntoFunction the last argument in the arguments TupleEntry will be the object the BuildSpec copies values into.

In the case of a *BuildAsFunction a new root object will be created for the BuildSpec to copy values into.

In the case of JSON objects, multiple JSON objects selected as arguments can be combined into a new JSON object by mapping the field names into locations on the new object.

For selecting the values from an existing nested object in order to create a new object or update an existing one see NestedBaseCopyFunction sub-classes.

See Also:

BuildSpec, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	NestedBaseBuildFunction.Context

Field Summary

Fields

Modifier and Type	Field and Description
protected heretical.pointer.operation.Builder<Node,Result>	builder

Fields inherited from class cascading.nested.core.NestedBaseOperation

nestedCoercibleType

Fields inherited from class cascading.operation.BaseOperation

fieldDeclaration, numArgs, trace

Fields inherited from interface cascading.operation.Operation

ANY

Constructor Summary

Constructors

Constructor and Description
NestedBaseBuildFunction(NestedCoercibleType<Node,Result> nestedCoercibleType, cascading.tuple.Fields fieldDeclaration, BuildSpec... buildSpecs)

Method Summary

Modifier and Type	Method and Description
void	operate(cascading.flow.FlowProcess flowProcess, cascading.operation.FunctionCall<NestedBaseBuildFunction.Context> functionCall)
void	prepare(cascading.flow.FlowProcess flowProcess, cascading.operation.OperationCall<NestedBaseBuildFunction.Context> operationCall)

Methods inherited from class cascading.nested.core.NestedSpecBaseOperation

getArgument, getResultNode, isInto

Methods inherited from class cascading.nested.core.NestedBaseOperation

deepCopy, getCoercibleType, getLiteralNode, getNestedPointerCompiler, getRootNode, iterable, size

Methods inherited from class cascading.operation.BaseOperation

cleanup, equals, flush, getFieldDeclaration, getNumArgs, getTrace, hashCode, isSafe, printOperationInternal, toString, toStringInternal

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface cascading.operation.Operation

cleanup, flush, getFieldDeclaration, getNumArgs, isSafe

Field Detail

builder

protected heretical.pointer.operation.Builder<Node,Result> builder

Constructor Detail

NestedBaseBuildFunction

public NestedBaseBuildFunction(NestedCoercibleType<Node,Result> nestedCoercibleType,
                               cascading.tuple.Fields fieldDeclaration,
                               BuildSpec... buildSpecs)

Method Detail

prepare

public void prepare(cascading.flow.FlowProcess flowProcess,
                    cascading.operation.OperationCall<NestedBaseBuildFunction.Context> operationCall)

Specified by:

prepare in interface cascading.operation.Operation<NestedBaseBuildFunction.Context>

Overrides:

prepare in class NestedSpecBaseOperation<Node,Result,NestedBaseBuildFunction.Context>

operate

public void operate(cascading.flow.FlowProcess flowProcess,
                    cascading.operation.FunctionCall<NestedBaseBuildFunction.Context> functionCall)

Specified by:

operate in interface cascading.operation.Function<NestedBaseBuildFunction.Context>