graphql.schema.GraphQLObjectType Maven / Gradle / Ivy
package graphql.schema;
import graphql.AssertException;
import graphql.Internal;
import graphql.PublicApi;
import graphql.language.ObjectTypeDefinition;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import java.util.function.UnaryOperator;
import java.util.stream.Collectors;
import static graphql.Assert.assertNotNull;
import static graphql.Assert.assertValidName;
import static graphql.util.FpKit.getByName;
import static graphql.util.FpKit.valuesToList;
import static java.lang.String.format;
import static java.util.Collections.emptyList;
/**
* This is the work horse type and represents an object with one or more field values that can be retrieved
* by the graphql system.
*
* Those fields can themselves by object types and so on until you reach the leaf nodes of the type tree represented
* by {@link graphql.schema.GraphQLScalarType}s.
*
* See http://graphql.org/learn/schema/#object-types-and-fields for more details on the concept.
*/
@PublicApi
public class GraphQLObjectType implements GraphQLType, GraphQLOutputType, GraphQLFieldsContainer, GraphQLCompositeType, GraphQLUnmodifiedType, GraphQLNullableType, GraphQLDirectiveContainer {
private final String name;
private final String description;
private final Map fieldDefinitionsByName = new LinkedHashMap<>();
private List interfaces = new ArrayList<>();
private final List directives;
private final ObjectTypeDefinition definition;
@Internal
public GraphQLObjectType(String name, String description, List fieldDefinitions,
List interfaces) {
this(name, description, fieldDefinitions, interfaces, emptyList(), null);
}
@Internal
public GraphQLObjectType(String name, String description, List fieldDefinitions,
List interfaces, List directives, ObjectTypeDefinition definition) {
assertValidName(name);
assertNotNull(fieldDefinitions, "fieldDefinitions can't be null");
assertNotNull(interfaces, "interfaces can't be null");
this.name = name;
this.description = description;
this.interfaces = interfaces;
this.definition = definition;
this.directives = assertNotNull(directives);
buildDefinitionMap(fieldDefinitions);
}
void replaceTypeReferences(Map typeMap) {
this.interfaces = this.interfaces.stream()
.map(type -> (GraphQLOutputType) new SchemaUtil().resolveTypeReference(type, typeMap))
.collect(Collectors.toList());
}
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 type '%s'", name, this.name));
fieldDefinitionsByName.put(name, fieldDefinition);
}
}
@Override
public List getDirectives() {
return new ArrayList<>(directives);
}
public GraphQLFieldDefinition getFieldDefinition(String name) {
return fieldDefinitionsByName.get(name);
}
public List getFieldDefinitions() {
return new ArrayList<>(fieldDefinitionsByName.values());
}
/**
* @return This returns GraphQLInterface or GraphQLTypeReference instances, if the type
* references are not resolved yet. After they are resolved it contains only GraphQLInterface.
* Reference resolving happens when a full schema is built.
*/
public List getInterfaces() {
return new ArrayList<>(interfaces);
}
public String getDescription() {
return description;
}
public String getName() {
return name;
}
public ObjectTypeDefinition getDefinition() {
return definition;
}
@Override
public String toString() {
return "GraphQLObjectType{" +
"name='" + name + '\'' +
", description='" + description + '\'' +
", fieldDefinitionsByName=" + fieldDefinitionsByName.keySet() +
", interfaces=" + interfaces +
'}';
}
/**
* This helps you transform the current GraphQLObjectType 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 GraphQLObjectType transform(Consumer builderConsumer) {
Builder builder = newObject(this);
builderConsumer.accept(builder);
return builder.build();
}
public static Builder newObject() {
return new Builder();
}
public static Builder newObject(GraphQLObjectType existing) {
return new Builder(existing);
}
@PublicApi
public static class Builder {
private String name;
private String description;
private ObjectTypeDefinition definition;
private final Map fields = new LinkedHashMap<>();
private final Map interfaces = new LinkedHashMap<>();
private final Map directives = new LinkedHashMap<>();
public Builder() {
}
public Builder(GraphQLObjectType existing) {
name = existing.getName();
description = existing.getDescription();
definition = existing.getDefinition();
fields.putAll(getByName(existing.getFieldDefinitions(), GraphQLFieldDefinition::getName));
interfaces.putAll(getByName(existing.getInterfaces(), GraphQLType::getName));
directives.putAll(getByName(existing.getDirectives(), GraphQLDirective::getName));
}
public Builder name(String name) {
this.name = name;
return this;
}
public Builder description(String description) {
this.description = description;
return this;
}
public Builder definition(ObjectTypeDefinition 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.build());
}
/**
* 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;
}
/**
* This is used to clear all the fields in the builder so far.
*
* @return the builder
*/
public Builder clearFields() {
fields.clear();
return this;
}
public boolean hasField(String fieldName) {
return fields.containsKey(fieldName);
}
public Builder withInterface(GraphQLInterfaceType interfaceType) {
assertNotNull(interfaceType, "interfaceType can't be null");
this.interfaces.put(interfaceType.getName(), interfaceType);
return this;
}
public Builder withInterface(GraphQLTypeReference reference) {
assertNotNull(reference, "reference can't be null");
this.interfaces.put(reference.getName(), reference);
return this;
}
public Builder withInterfaces(GraphQLInterfaceType... interfaceType) {
for (GraphQLInterfaceType type : interfaceType) {
withInterface(type);
}
return this;
}
public Builder withInterfaces(GraphQLTypeReference... references) {
for (GraphQLTypeReference reference : references) {
withInterface(reference);
}
return this;
}
/**
* This is used to clear all the interfaces in the builder so far.
*
* @return the builder
*/
public Builder clearInterfaces() {
interfaces.clear();
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 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 GraphQLObjectType build() {
return new GraphQLObjectType(name, description,
valuesToList(fields), valuesToList(interfaces), valuesToList(directives),
definition);
}
}
}
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