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graphql-apigen.stg
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// See https://github.com/antlr/stringtemplate4/blob/master/doc/groups.md
group apigen;
//////////////////////////////////////////////////////////////////////
// Define the objectType builder:
objectTypeFileName(model) ::= "<if(model.objectType)><model.name>.java<endif>"
objectTypeGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
<if(model.idField)>
import java.util.List;
<endif>
import com.distelli.graphql.ResolveDataFetchingEnvironment;
import graphql.schema.DataFetchingEnvironment;
public interface <model.name> extends ResolveDataFetchingEnvironment\<<model.name>\><model.interfaces:{ it |<if(it.type)>, <it.type><endif>}> {
public static class Builder {
<model.fields:{ it |
<if(!it.args)>
private <it.type> _<it.name>;
<endif>}>
public Builder() {}
public Builder(<model.name> src) {
<model.fields:{ it |
<if(!it.args)>
_<it.name> = src.get<it.ucname>();
<endif>}>
}
<model.fields:{ it |
<if(!it.args)>
public Builder with<it.ucname>(<it.type> _<it.name>) {
this._<it.name> = _<it.name>;
return this;
\}
<endif>}>
public <model.name> build() {
return new Impl(this);
}
}
public static class Impl implements <model.name> {
<model.fields:{ it |
<if(!it.args)>
private <it.type> _<it.name>;
<endif>}>
protected Impl(Builder builder) {
<model.fields:{ it |
<if(!it.args)>
this._<it.name> = builder._<it.name>;
<endif>}>
}
<model.fields:{ it |
<if(!it.args)>
@Override
public <it.type> get<it.ucname>() {
return _<it.name>;
\}
<endif>}>
@Override
public String toString() {
return "<model.name>{"
<model.fields,[true]:{ it,isFirst |
<if(!it.args)>
+ "<if(!isFirst)>, <endif><it.name>=" + _<it.name>
<endif>}>
+ "}";
}
// TODO: equals(Object) & hashCode()
}
public default <model.name> resolve(DataFetchingEnvironment env) {
return this;
}
<if(model.idField)>
public static class Unresolved implements <model.name> {
private <model.idField.type> _id;
public Unresolved(<model.idField.type> id) {
this._id = id;
}
@Override
public <model.idField.type> getId() {
return _id;
}
@Override
public String toString() {
return "<model.name>.Unresolved{"
+ "id=" + _id
+ "}";
}
}
public static interface Resolver extends com.distelli.graphql.Resolver\<<model.name>\> {
public List\<<model.name>\> resolve(List\<<model.name>\> list);
}
<endif>
<model.fields:{ it |
<if(it.args)>
// TODO: extend any implemented interfaces...
interface <it.ucname>Args {
<it.args:{ it |
default <it.type> get<it.ucname>() { return null; \}}>
\}
public default <it.type> <it.name>(<it.ucname>Args args) { return null; \}
<else>
public default <it.type> get<it.ucname>() { return null; \}
<endif>}>
}
>>
//////////////////////////////////////////////////////////////////////
// Define the object TypeProvider
objectTypeProviderFileName(model) ::= "<if(model.objectType)><model.name>TypeProvider.java<endif>"
objectTypeProviderGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
import com.distelli.graphql.MethodDataFetcher;
import com.distelli.graphql.ResolverDataFetcher;
import graphql.Scalars;
import graphql.schema.*;
import java.util.Arrays;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Named;
import java.util.Optional;
@Named
public class <model.name>TypeProvider implements Provider\<GraphQLObjectType> {
<model.dataResolvers:{ it |
<if(it.fieldType)>
@Inject
private Optional\<<it.fieldType>\> <it.fieldName>;
<endif>}>
@Inject
private Optional\<<model.name>\> _impl;
@Inject
protected <model.name>TypeProvider() {}
@Override
public GraphQLObjectType get() {
return GraphQLObjectType.newObject()
.name("<model.name>")
<model.fields:{ it |
.field(GraphQLFieldDefinition.newFieldDefinition()
.type(<it.graphQLType>)
.name("<it.name>")
<if(it.args)>
.argument(Arrays.asList(
<it.args:{ it |
GraphQLArgument.newArgument()
.name("<it.name>")
.type(<it.graphQLType>)
<if(it.defaultValue)>
.defaultValue(<it.defaultValue>)
<endif>
.build()}; separator=",\n">))
<endif>
<if(it.dataResolver)>
.dataFetcher(new ResolverDataFetcher(
new MethodDataFetcher(
"<it.name>",
<if(it.args)><model.name>.<it.ucname>Args.class<else>null<endif>,
_impl.orElse(null)),
<it.dataResolver.fieldName>.orElse(null),
<it.dataResolver.listDepth>))
<else>
.dataFetcher(new MethodDataFetcher(
"<it.name>",
<if(it.args)><model.name>.<it.ucname>Args.class<else>null<endif>,
_impl.orElse(null)))
<endif>
.build())}>
.build();
}
}
>>
objectTypeProviderGuiceModule(model) ::= <<
types.addBinding("<model.name>")
.toProvider(<model.packageName>.<model.name>TypeProvider.class);
OptionalBinder.newOptionalBinder(binder(), <model.packageName>.<model.name>.class);
<if(model.idField)>
OptionalBinder.newOptionalBinder(binder(), <model.packageName>.<model.name>.Resolver.class);
<endif>
>>
//////////////////////////////////////////////////////////////////////
// Define the inputObjectType builder:
inputObjectTypeFileName(model) ::= "<if(model.inputObjectType)><model.name>.java<endif>"
inputObjectTypeGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
public interface <model.name> {
public static class Builder {
<model.fields:{ it |
private <it.type> _<it.name>;}>
public Builder() {}
public Builder(<model.name> src) {
<model.fields:{ it |
_<it.name> = src.get<it.ucname>();}>
}
<model.fields:{ it |
public Builder with<it.ucname>(<it.type> _<it.name>) {
this._<it.name> = _<it.name>;
return this;
\}}>
public <model.name> build() {
return new Impl(this);
}
}
public static class Impl implements <model.name> {
<model.fields:{ it |
private <it.type> _<it.name>;}>
protected Impl(Builder builder) {
<model.fields:{ it |
this._<it.name> = builder._<it.name>;}>
}
<model.fields:{ it |
@Override
public <it.type> get<it.ucname>() {
return _<it.name>;
\}}>
@Override
public String toString() {
return "<model.name>{"
<model.fields,[true]:{ it,isFirst |
+ "<if(!isFirst)>, <endif><it.name>=" + _<it.name>}>
+ "}";
}
// TODO: equals(Object) & hashCode()
}
<model.fields:{ it |
public default <it.type> get<it.ucname>() { return null; \}}>
}
>>
//////////////////////////////////////////////////////////////////////
// Define the object TypeProvider
inputObjectTypeProviderFileName(model) ::= "<if(model.inputObjectType)><model.name>TypeProvider.java<endif>"
inputObjectTypeProviderGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
import graphql.Scalars;
import graphql.schema.*;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Named;
@Named
public class <model.name>TypeProvider implements Provider\<GraphQLInputObjectType> {
@Inject
protected <model.name>TypeProvider() {}
@Override
public GraphQLInputObjectType get() {
return GraphQLInputObjectType.newInputObject()
.name("<model.name>")
<model.fields:{ it |
.field(GraphQLInputObjectField.newInputObjectField()
.type(<it.graphQLType>)
.name("<it.name>")
<if(it.defaultValue)>
.defaultValue(<it.defaultValue>)
<endif>
.build())}>
.build();
}
}
>>
inputObjectTypeProviderGuiceModule(model) ::= <<
types.addBinding("<model.name>")
.toProvider(<model.packageName>.<model.name>TypeProvider.class);
OptionalBinder.newOptionalBinder(binder(), <model.packageName>.<model.name>.class);
>>
//////////////////////////////////////////////////////////////////////
// Define the GuiceModule:
guiceModule(packageName, className, configure) ::= <<
package <packageName>;
import com.google.inject.AbstractModule;
import com.google.inject.multibindings.MapBinder;
import com.google.inject.multibindings.OptionalBinder;
import graphql.schema.GraphQLType;
public class <className> extends AbstractModule {
protected void configure() {
MapBinder\<String, GraphQLType> types =
MapBinder.newMapBinder(binder(), String.class, GraphQLType.class);
<configure>
}
}
>>
//////////////////////////////////////////////////////////////////////
// Define the interface builder:
interfaceFileName(model) ::= "<if(model.interfaceType)><model.name>.java<endif>"
interfaceGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
public interface <model.name> {
<model.methods:{ it |
interface <it.ucname>Args {
<it.args:{ it |
default <it.type> get<it.ucname>() { return null; \}}>
\}
public default <it.type> <it.name>(<it.ucname>Args args) {
return null;
\}}>
<model.fields:{ it |
<if(it.args)>
interface <it.ucname>Args {
<it.args:{ it |
<it.type> get<it.ucname>();}>
\}
public <it.type> <it.name>(<it.ucname>Args args);
<else>
public <it.type> get<it.ucname>();
<endif>}>
}
>>
//////////////////////////////////////////////////////////////////////
// Define the enum builder:
enumFileName(model) ::= "<if(model.enumType)><model.name>.java<endif>"
enumGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
public enum <model.name> {
<model.fields:{ it |
<it.name>,}>
}
>>
enumTypeProviderFileName(model) ::= "<if(model.enumType)><model.name>TypeProvider.java<endif>"
enumTypeProviderGenerator(model) ::= <<
package <model.packageName>;
<model.imports:{ it |
import <it>;}>
import graphql.schema.*;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Named;
@Named
public class <model.name>TypeProvider implements Provider\<GraphQLEnumType> {
@Inject
protected <model.name>TypeProvider() {}
@Override
public GraphQLEnumType get() {
return GraphQLEnumType.newEnum()
.name("<model.name>")
<model.fields:{ it |
.value("<it.name>", <model.name>.<it.name>, "<it.name>")}>
.build();
}
}
>>
enumTypeProviderGuiceModule(model) ::= <<
types.addBinding("<model.name>")
.toProvider(<model.packageName>.<model.name>TypeProvider.class);
>>