/**
 *
 * Copyright (c) 2006-2018, Speedment, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); You may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.speedment.common.codegen.internal.java.view;

import com.speedment.common.codegen.Generator;
import com.speedment.common.codegen.Transform;
import com.speedment.common.codegen.internal.java.view.trait.*;
import com.speedment.common.codegen.model.InterfaceMethod;

import java.util.Optional;

import static com.speedment.common.codegen.model.modifier.Modifier.DEFAULT;
import static com.speedment.common.codegen.model.modifier.Modifier.STATIC;
import static com.speedment.common.codegen.util.Formatting.nl;
import static com.speedment.common.codegen.util.Formatting.tab;
import static java.util.Objects.requireNonNull;

/**
 * Transforms from an {@link InterfaceMethod} to java code.
 * 
 * @author Emil Forslund
 */
public final class InterfaceMethodView 
implements Transform<InterfaceMethod, String>,
        HasModifiersView<InterfaceMethod>,
        HasNameView<InterfaceMethod>,
        HasTypeView<InterfaceMethod>,
        HasThrowsView<InterfaceMethod>,
        HasGenericsView<InterfaceMethod>,
        HasFieldsView<InterfaceMethod>,
        HasJavadocView<InterfaceMethod>, 
        HasAnnotationUsageView<InterfaceMethod>,
        HasCodeView<InterfaceMethod> {

	@Override
	public Optional<String> transform(Generator gen, InterfaceMethod model) {
        requireNonNull(gen);
        requireNonNull(model);
        
        final Optional<String> body = Optional.of(renderCode(gen, model))
            .filter(s -> model.getModifiers().contains(DEFAULT)
                      || model.getModifiers().contains(STATIC)
            );
        
        return Optional.of(
            renderJavadoc(gen, model) +
            renderAnnotations(gen, model) +
			renderModifiers(gen, model, STATIC, DEFAULT) +
            renderGenerics(gen, model) +
            renderType(gen, model) +
            renderName(gen, model) + ((model.getFields().size() > 3) ? "(" + nl() : "(") +
            renderFields(gen, model) + ") " +
            renderThrows(gen, model) + 
            body.orElse(";")
        );
	}

    @Override
    public String fieldSeparator(InterfaceMethod model) {
        if (model.getFields().size() > 3) {
            return "," + nl() + tab() + tab();
        } else return ", ";
    }

    @Override
    public String throwsSuffix(InterfaceMethod model) {
        return (model.getModifiers().contains(DEFAULT)
             || model.getModifiers().contains(STATIC))
            ? " " : "";
    }

    @Override
    public boolean useTripleDot() {
        return true;
    }
}
@@ -2182,24 +2182,25 @@
      );%0A
+%0A
         
 %0A       
@@ -2183,32 +2183,86 @@
     );%0A%0A        
+final String spacing = body.map($ -%3E %22 %22).orElse(%22%22);%0A
 %0A        return 
@@ -2618,18 +2618,27 @@
 el) + %22)
- 
 %22
+ + spacing
  +%0A     

Fix spacing in interface methods