graphql.schema.GraphQLInterfaceType Maven / Gradle / Ivy
package graphql.schema;
import graphql.AssertException;
import graphql.Internal;
import graphql.PublicApi;
import graphql.language.InterfaceTypeDefinition;
import graphql.util.TraversalControl;
import graphql.util.TraverserContext;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import java.util.function.UnaryOperator;
import static graphql.Assert.assertNotNull;
import static graphql.Assert.assertValidName;
import static graphql.util.FpKit.getByName;
import static java.lang.String.format;
/**
* In graphql, an interface is an abstract type that defines the set of fields that a type must include to
* implement that interface.
*
* At runtime a {@link graphql.schema.TypeResolver} is used to take an interface object value and decide what {@link graphql.schema.GraphQLObjectType}
* represents this interface type.
*
*
* See http://graphql.org/learn/schema/#interfaces for more details on the concept.
*/
@PublicApi
public class GraphQLInterfaceType implements GraphQLNamedOutputType, GraphQLFieldsContainer, GraphQLCompositeType, GraphQLUnmodifiedType, GraphQLNullableType, GraphQLDirectiveContainer {
private final String name;
private final String description;
private final Map fieldDefinitionsByName = new LinkedHashMap<>();
private final TypeResolver typeResolver;
private final InterfaceTypeDefinition definition;
private final List directives;
public static final String CHILD_FIELD_DEFINITIONS = "fieldDefinitions";
public static final String CHILD_DIRECTIVES = "directives";
/**
* @param name the name
* @param description the description
* @param fieldDefinitions the fields
* @param typeResolver the type resolver function
*
* @deprecated use the {@link #newInterface()} builder pattern instead, as this constructor will be made private in a future version.
*/
@Internal
@Deprecated
public GraphQLInterfaceType(String name, String description, List fieldDefinitions, TypeResolver typeResolver) {
this(name, description, fieldDefinitions, typeResolver, Collections.emptyList(), null);
}
/**
* @param name the name
* @param description the description
* @param fieldDefinitions the fields
* @param typeResolver the type resolver function
* @param directives the directives on this type element
* @param definition the AST definition
*
* @deprecated use the {@link #newInterface()} builder pattern instead, as this constructor will be made private in a future version.
*/
@Internal
@Deprecated
public GraphQLInterfaceType(String name, String description, List fieldDefinitions, TypeResolver typeResolver, List directives, InterfaceTypeDefinition definition) {
assertValidName(name);
assertNotNull(fieldDefinitions, "fieldDefinitions can't null");
assertNotNull(directives, "directives cannot be null");
this.name = name;
this.description = description;
this.typeResolver = typeResolver;
this.definition = definition;
this.directives = directives;
buildDefinitionMap(fieldDefinitions);
}
private void buildDefinitionMap(List fieldDefinitions) {
for (GraphQLFieldDefinition fieldDefinition : fieldDefinitions) {
String name = fieldDefinition.getName();
if (fieldDefinitionsByName.containsKey(name)) {
throw new AssertException(format("Duplicated definition for field '%s' in interface '%s'", name, this.name));
}
fieldDefinitionsByName.put(name, fieldDefinition);
}
}
@Override
public GraphQLFieldDefinition getFieldDefinition(String name) {
return fieldDefinitionsByName.get(name);
}
@Override
public List getFieldDefinitions() {
return new ArrayList<>(fieldDefinitionsByName.values());
}
@Override
public String getName() {
return name;
}
public String getDescription() {
return description;
}
// to be removed in a future version when all code is in the code registry
TypeResolver getTypeResolver() {
return typeResolver;
}
public InterfaceTypeDefinition getDefinition() {
return definition;
}
@Override
public List getDirectives() {
return new ArrayList<>(directives);
}
@Override
public String toString() {
return "GraphQLInterfaceType{" +
"name='" + name + '\'' +
", description='" + description + '\'' +
", fieldDefinitionsByName=" + fieldDefinitionsByName.keySet() +
", typeResolver=" + typeResolver +
'}';
}
/**
* This helps you transform the current GraphQLInterfaceType into another one by starting a builder with all
* the current values and allows you to transform it how you want.
*
* @param builderConsumer the consumer code that will be given a builder to transform
*
* @return a new object based on calling build on that builder
*/
public GraphQLInterfaceType transform(Consumer builderConsumer) {
Builder builder = newInterface(this);
builderConsumer.accept(builder);
return builder.build();
}
@Override
public TraversalControl accept(TraverserContext context, GraphQLTypeVisitor visitor) {
return visitor.visitGraphQLInterfaceType(this, context);
}
@Override
public List getChildren() {
List children = new ArrayList<>(fieldDefinitionsByName.values());
children.addAll(directives);
return children;
}
@Override
public SchemaElementChildrenContainer getChildrenWithTypeReferences() {
return SchemaElementChildrenContainer.newSchemaElementChildrenContainer()
.children(CHILD_FIELD_DEFINITIONS, fieldDefinitionsByName.values())
.children(CHILD_DIRECTIVES, directives)
.build();
}
@Override
public GraphQLInterfaceType withNewChildren(SchemaElementChildrenContainer newChildren) {
return transform(builder ->
builder.replaceDirectives(newChildren.getChildren(CHILD_DIRECTIVES))
.replaceFields(newChildren.getChildren(CHILD_FIELD_DEFINITIONS))
);
}
public static Builder newInterface() {
return new Builder();
}
public static Builder newInterface(GraphQLInterfaceType existing) {
return new Builder(existing);
}
@PublicApi
public static class Builder extends GraphqlTypeBuilder {
private TypeResolver typeResolver;
private InterfaceTypeDefinition definition;
private final Map fields = new LinkedHashMap<>();
private final Map directives = new LinkedHashMap<>();
public Builder() {
}
public Builder(GraphQLInterfaceType existing) {
this.name = existing.getName();
this.description = existing.getDescription();
this.typeResolver = existing.getTypeResolver();
this.definition = existing.getDefinition();
this.fields.putAll(getByName(existing.getFieldDefinitions(), GraphQLFieldDefinition::getName));
this.directives.putAll(getByName(existing.getDirectives(), GraphQLDirective::getName));
}
@Override
public Builder name(String name) {
super.name(name);
return this;
}
@Override
public Builder description(String description) {
super.description(description);
return this;
}
@Override
public Builder comparatorRegistry(GraphqlTypeComparatorRegistry comparatorRegistry) {
super.comparatorRegistry(comparatorRegistry);
return this;
}
public Builder definition(InterfaceTypeDefinition definition) {
this.definition = definition;
return this;
}
public Builder field(GraphQLFieldDefinition fieldDefinition) {
assertNotNull(fieldDefinition, "fieldDefinition can't be null");
this.fields.put(fieldDefinition.getName(), fieldDefinition);
return this;
}
/**
* Take a field builder in a function definition and apply. Can be used in a jdk8 lambda
* e.g.:
*
* {@code
* field(f -> f.name("fieldName"))
* }
*
*
* @param builderFunction a supplier for the builder impl
*
* @return this
*/
public Builder field(UnaryOperator builderFunction) {
assertNotNull(builderFunction, "builderFunction can't be null");
GraphQLFieldDefinition.Builder builder = GraphQLFieldDefinition.newFieldDefinition();
builder = builderFunction.apply(builder);
return field(builder);
}
/**
* Same effect as the field(GraphQLFieldDefinition). Builder.build() is called
* from within
*
* @param builder an un-built/incomplete GraphQLFieldDefinition
*
* @return this
*/
public Builder field(GraphQLFieldDefinition.Builder builder) {
return field(builder.build());
}
public Builder fields(List fieldDefinitions) {
assertNotNull(fieldDefinitions, "fieldDefinitions can't be null");
fieldDefinitions.forEach(this::field);
return this;
}
public Builder replaceFields(List fieldDefinitions) {
assertNotNull(fieldDefinitions, "fieldDefinitions can't be null");
this.fields.clear();
fieldDefinitions.forEach(this::field);
return this;
}
public boolean hasField(String fieldName) {
return fields.containsKey(fieldName);
}
/**
* This is used to clear all the fields in the builder so far.
*
* @return the builder
*/
public Builder clearFields() {
fields.clear();
return this;
}
@Deprecated
public Builder typeResolver(TypeResolver typeResolver) {
this.typeResolver = typeResolver;
return this;
}
public Builder withDirectives(GraphQLDirective... directives) {
for (GraphQLDirective directive : directives) {
withDirective(directive);
}
return this;
}
public Builder withDirective(GraphQLDirective directive) {
assertNotNull(directive, "directive can't be null");
directives.put(directive.getName(), directive);
return this;
}
public Builder replaceDirectives(List directives) {
assertNotNull(directives, "directive can't be null");
this.directives.clear();
for (GraphQLDirective directive : directives) {
this.directives.put(directive.getName(), directive);
}
return this;
}
public Builder withDirective(GraphQLDirective.Builder builder) {
return withDirective(builder.build());
}
/**
* This is used to clear all the directives in the builder so far.
*
* @return the builder
*/
public Builder clearDirectives() {
directives.clear();
return this;
}
public GraphQLInterfaceType build() {
return new GraphQLInterfaceType(
name,
description,
sort(fields, GraphQLInterfaceType.class, GraphQLFieldDefinition.class),
typeResolver,
sort(directives, GraphQLInterfaceType.class, GraphQLDirective.class),
definition);
}
}
}
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