graphql.execution

Class MergedField

java.lang.Object

graphql.execution.MergedField

@PublicApi
public class MergedField
extends java.lang.Object

This represent all Fields in a query which overlap and are merged into one. This means they all represent the same field actually when the query is executed. Example query with more than one Field merged together:

 

      query Foo {
          bar
          ...BarFragment
      }

      fragment BarFragment on Query {
          bar
      }
 
 

Another example:

 
     {
          me{fistName}
          me{lastName}
     }
 
 

Here the me field is merged together including the sub selections. A third example with different directives:

 
     {
          foo @someDirective
          foo @anotherDirective
     }
 
 

These examples make clear that you need to consider all merged fields together to have the full picture. The actual logic when fields can successfully merged together is implemented in {#graphql.validation.rules.OverlappingFieldsCanBeMerged}

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MergedField.Builder

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
java.util.List<Argument>	getArguments() All merged fields share the same arguments.
java.util.List<Field>	getFields() All merged fields
java.lang.String	getName() All merged fields have the same name.
java.lang.String	getResultKey() Returns the key of this MergedField for the overall result.
Field	getSingleField() The first of the merged fields.
int	hashCode()
static MergedField.Builder	newMergedField()
static MergedField.Builder	newMergedField(Field field)
static MergedField.Builder	newMergedField(java.util.List<Field> fields)
java.lang.String	toString()
MergedField	transform(java.util.function.Consumer<MergedField.Builder> builderConsumer)

Methods inherited from class java.lang.Object

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

Method Detail

getName

public java.lang.String getName()

All merged fields have the same name. WARNING: This is not always the key in the execution result, because of possible aliases. See getResultKey()

Returns:

the name of of the merged fields.

getResultKey

public java.lang.String getResultKey()

Returns the key of this MergedField for the overall result. This is either an alias or the field name.

Returns:

the key for this MergedField.

getSingleField

public Field getSingleField()

The first of the merged fields. Because all fields are almost identically often only one of the merged fields are used.

Returns:

the fist of the merged Fields

getArguments

public java.util.List<Argument> getArguments()

All merged fields share the same arguments.

Returns:

the list of arguments

getFields

public java.util.List<Field> getFields()

All merged fields

Returns:

all merged fields

newMergedField

public static MergedField.Builder newMergedField()

newMergedField

public static MergedField.Builder newMergedField(Field field)

newMergedField

public static MergedField.Builder newMergedField(java.util.List<Field> fields)

transform

public MergedField transform(java.util.function.Consumer<MergedField.Builder> builderConsumer)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object