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package org.zwobble.couscous.ast;
import java.util.Optional;
import java.util.function.Function;
import com.google.common.collect.ImmutableList;
import static org.zwobble.couscous.ast.FormalArgumentNode.formalArg;
import static org.zwobble.couscous.ast.VariableDeclaration.var;
public class ClassNodeBuilder {
private final TypeName name;
private final ImmutableList.Builder<FieldDeclarationNode> fields;
private Optional<ConstructorNode> constructor;
private final ImmutableList.Builder<MethodNode> methods;
public ClassNodeBuilder(String name) {
this.name = TypeName.of(name);
this.fields = ImmutableList.builder();
this.constructor = Optional.empty();
this.methods = ImmutableList.builder();
}
public ClassNodeBuilder field(String name, TypeName type) {
this.fields.add(FieldDeclarationNode.field(name, type));
return this;
}
public ClassNodeBuilder constructor(Function<MethodBuilder<ConstructorNode>, MethodBuilder<ConstructorNode>> build) {
this.constructor = Optional.of(build.apply(constructorBuilder()).build());
return this;
}
private MethodBuilder<ConstructorNode> constructorBuilder() {
return new MethodBuilder<ConstructorNode>(builder ->
ConstructorNode.constructor(
builder.arguments.build(),
builder.statements.build()));
}
public ClassNodeBuilder method(MethodNode method) {
this.methods.add(method);
return this;
}
public ClassNodeBuilder staticMethod(String name, Function<MethodBuilder<MethodNode>, MethodBuilder<MethodNode>> build) {
return method(name, true, build);
}
public ClassNodeBuilder method(String name, Function<MethodBuilder<MethodNode>, MethodBuilder<MethodNode>> build) {
return method(name, false, build);
}
public ClassNodeBuilder method(String name, boolean isStatic, Function<MethodBuilder<MethodNode>, MethodBuilder<MethodNode>> build) {
this.methods.add(build.apply(methodBuilder(name, isStatic)).build());
return this;
}
private MethodBuilder<MethodNode> methodBuilder(String name, boolean isStatic) {
return new MethodBuilder<MethodNode>(builder -> MethodNode.builder()
.isStatic(isStatic)
.name(name)
.arguments(builder.arguments.build())
.body(builder.statements.build())
.build());
}
public ClassNode build() {
return new ClassNode(
name,
fields.build(),
constructor.orElse(constructorBuilder().build()),
methods.build());
}
public class MethodBuilder<T> {
private final Function<MethodBuilder<?>, T> build;
private final ImmutableList.Builder<FormalArgumentNode> arguments;
private final ImmutableList.Builder<StatementNode> statements;
public MethodBuilder(Function<MethodBuilder<?>, T> build) {
this.build = build;
this.arguments = ImmutableList.builder();
this.statements = ImmutableList.builder();
}
public ThisReferenceNode thisReference() {
return ThisReferenceNode.thisReference(name);
}
public MethodBuilder<T> argument(String id, String name, TypeName type) {
arguments.add(formalArg(var(id, name, type)));
return this;
}
public MethodBuilder<T> argument(FormalArgumentNode argument) {
arguments.add(argument);
return this;
}
public MethodBuilder<T> statement(StatementNode statement) {
statements.add(statement);
return this;
}
public T build() {
return this.build.apply(this);
}
}
}
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