graphql.schema.GraphQLEnumType Maven / Gradle / Ivy
package graphql.schema;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import graphql.Internal;
import graphql.PublicApi;
import graphql.language.EnumTypeDefinition;
import graphql.language.EnumTypeExtensionDefinition;
import graphql.language.EnumValue;
import graphql.util.FpKit;
import graphql.util.TraversalControl;
import graphql.util.TraverserContext;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import static graphql.Assert.assertNotNull;
import static graphql.Assert.assertShouldNeverHappen;
import static graphql.Assert.assertValidName;
import static graphql.schema.GraphQLEnumValueDefinition.newEnumValueDefinition;
import static graphql.util.FpKit.getByName;
import static java.util.Collections.emptyList;
/**
* A graphql enumeration type has a limited set of values.
*
* This allows you to validate that any arguments of this type are one of the allowed values
* and communicate through the type system that a field will always be one of a finite set of values.
*
* See http://graphql.org/learn/schema/#enumeration-types for more details
*/
@PublicApi
public class GraphQLEnumType implements GraphQLNamedInputType, GraphQLNamedOutputType, GraphQLUnmodifiedType, GraphQLNullableType, GraphQLDirectiveContainer {
private final String name;
private final String description;
private final ImmutableMap valueDefinitionMap;
private final EnumTypeDefinition definition;
private final ImmutableList extensionDefinitions;
private final ImmutableList directives;
public static final String CHILD_VALUES = "values";
public static final String CHILD_DIRECTIVES = "directives";
/**
* @param name the name
* @param description the description
* @param values the values
*
* @deprecated use the {@link #newEnum()} builder pattern instead, as this constructor will be made private in a future version.
*/
@Internal
@Deprecated
public GraphQLEnumType(String name, String description, List values) {
this(name, description, values, emptyList(), null);
}
/**
* @param name the name
* @param description the description
* @param values the values
* @param directives the directives on this type element
* @param definition the AST definition
*
* @deprecated use the {@link #newEnum()} builder pattern instead, as this constructor will be made private in a future version.
*/
@Internal
@Deprecated
public GraphQLEnumType(String name, String description, List values, List directives, EnumTypeDefinition definition) {
this(name, description, values, directives, definition, emptyList());
}
private GraphQLEnumType(String name, String description, List values, List directives, EnumTypeDefinition definition, List extensionDefinitions) {
assertValidName(name);
assertNotNull(directives, () -> "directives cannot be null");
this.name = name;
this.description = description;
this.definition = definition;
this.extensionDefinitions = ImmutableList.copyOf(extensionDefinitions);
this.directives = ImmutableList.copyOf(directives);
this.valueDefinitionMap = buildMap(values);
}
@Internal
public Object serialize(Object input) {
return getNameByValue(input);
}
@Internal
public Object parseValue(Object input) {
return getValueByName(input);
}
private String typeName(Object input) {
if (input == null) {
return "null";
}
return input.getClass().getSimpleName();
}
@Internal
public Object parseLiteral(Object input) {
if (!(input instanceof EnumValue)) {
throw new CoercingParseLiteralException(
"Expected AST type 'EnumValue' but was '" + typeName(input) + "'."
);
}
EnumValue enumValue = (EnumValue) input;
GraphQLEnumValueDefinition enumValueDefinition = valueDefinitionMap.get(enumValue.getName());
if (enumValueDefinition == null) {
throw new CoercingParseLiteralException(
"Expected enum literal value not in allowable values - '" + String.valueOf(input) + "'."
);
}
return enumValueDefinition.getValue();
}
public List getValues() {
return ImmutableList.copyOf(valueDefinitionMap.values());
}
public GraphQLEnumValueDefinition getValue(String name) {
return valueDefinitionMap.get(name);
}
private ImmutableMap buildMap(List values) {
return ImmutableMap.copyOf(FpKit.getByName(values, GraphQLEnumValueDefinition::getName,
(fld1, fld2) -> assertShouldNeverHappen("Duplicated definition for field '%s' in type '%s'", fld1.getName(), this.name)));
}
private Object getValueByName(Object value) {
GraphQLEnumValueDefinition enumValueDefinition = valueDefinitionMap.get(value.toString());
if (enumValueDefinition != null) {
return enumValueDefinition.getValue();
}
throw new CoercingParseValueException("Invalid input for Enum '" + name + "'. No value found for name '" + value.toString() + "'");
}
private Object getNameByValue(Object value) {
for (GraphQLEnumValueDefinition valueDefinition : valueDefinitionMap.values()) {
Object definitionValue = valueDefinition.getValue();
if (value.equals(definitionValue)) {
return valueDefinition.getName();
}
// we can treat enum backing values as strings in effect
if (definitionValue instanceof Enum && value instanceof String) {
if (value.equals(((Enum) definitionValue).name())) {
return valueDefinition.getName();
}
}
}
// ok we didn't match on pure object.equals(). Lets try the Java enum strategy
if (value instanceof Enum) {
String enumNameValue = ((Enum) value).name();
for (GraphQLEnumValueDefinition valueDefinition : valueDefinitionMap.values()) {
Object definitionValue = String.valueOf(valueDefinition.getValue());
if (enumNameValue.equals(definitionValue)) {
return valueDefinition.getName();
}
}
}
throw new CoercingSerializeException("Invalid input for Enum '" + name + "'. Unknown value '" + value + "'");
}
@Override
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public EnumTypeDefinition getDefinition() {
return definition;
}
public List getExtensionDefinitions() {
return extensionDefinitions;
}
@Override
public List getDirectives() {
return directives;
}
/**
* This helps you transform the current GraphQLEnumType 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 field based on calling build on that builder
*/
public GraphQLEnumType transform(Consumer builderConsumer) {
Builder builder = newEnum(this);
builderConsumer.accept(builder);
return builder.build();
}
@Override
public TraversalControl accept(TraverserContext context, GraphQLTypeVisitor visitor) {
return visitor.visitGraphQLEnumType(this, context);
}
@Override
public List getChildren() {
List children = new ArrayList<>(valueDefinitionMap.values());
children.addAll(directives);
return children;
}
@Override
public SchemaElementChildrenContainer getChildrenWithTypeReferences() {
return SchemaElementChildrenContainer.newSchemaElementChildrenContainer()
.children(CHILD_VALUES, valueDefinitionMap.values())
.children(CHILD_DIRECTIVES, directives)
.build();
}
@Override
public GraphQLEnumType withNewChildren(SchemaElementChildrenContainer newChildren) {
return transform(builder ->
builder.replaceDirectives(newChildren.getChildren(CHILD_DIRECTIVES))
.replaceValues(newChildren.getChildren(CHILD_VALUES))
);
}
/**
* {@inheritDoc}
*/
@Override
public final boolean equals(Object o) {
return super.equals(o);
}
/**
* {@inheritDoc}
*/
@Override
public final int hashCode() {
return super.hashCode();
}
public static Builder newEnum() {
return new Builder();
}
public static Builder newEnum(GraphQLEnumType existing) {
return new Builder(existing);
}
public static class Builder extends GraphqlTypeBuilder {
private EnumTypeDefinition definition;
private List extensionDefinitions = emptyList();
private final Map values = new LinkedHashMap<>();
private final Map directives = new LinkedHashMap<>();
public Builder() {
}
public Builder(GraphQLEnumType existing) {
this.name = existing.getName();
this.description = existing.getDescription();
this.definition = existing.getDefinition();
this.extensionDefinitions = existing.getExtensionDefinitions();
this.values.putAll(getByName(existing.getValues(), GraphQLEnumValueDefinition::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(EnumTypeDefinition definition) {
this.definition = definition;
return this;
}
public Builder extensionDefinitions(List extensionDefinitions) {
this.extensionDefinitions = extensionDefinitions;
return this;
}
public Builder value(String name, Object value, String description, String deprecationReason) {
return value(newEnumValueDefinition().name(name)
.description(description).value(value)
.deprecationReason(deprecationReason).build());
}
public Builder value(String name, Object value, String description) {
return value(newEnumValueDefinition().name(name)
.description(description).value(value).build());
}
public Builder value(String name, Object value) {
assertNotNull(value, () -> "value can't be null");
return value(newEnumValueDefinition().name(name)
.value(value).build());
}
public Builder value(String name) {
return value(newEnumValueDefinition().name(name)
.value(name).build());
}
public Builder values(List valueDefinitions) {
valueDefinitions.forEach(this::value);
return this;
}
public Builder replaceValues(List valueDefinitions) {
this.values.clear();
valueDefinitions.forEach(this::value);
return this;
}
public Builder value(GraphQLEnumValueDefinition enumValueDefinition) {
assertNotNull(enumValueDefinition, () -> "enumValueDefinition can't be null");
values.put(enumValueDefinition.getName(), enumValueDefinition);
return this;
}
public boolean hasValue(String name) {
return values.containsKey(name);
}
/**
* This is used to clear all the values in the builder so far.
*
* @return the builder
*/
public Builder clearValues() {
values.clear();
return this;
}
public Builder withDirectives(GraphQLDirective... directives) {
assertNotNull(directives, () -> "directives can't be null");
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 GraphQLEnumType build() {
return new GraphQLEnumType(
name,
description,
sort(values, GraphQLEnumType.class, GraphQLEnumValueDefinition.class),
sort(directives, GraphQLEnumType.class, GraphQLDirective.class),
definition,
extensionDefinitions);
}
}
}