/**
*
* Copyright (c) 2006-2017, 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.trait;
import com.speedment.common.codegen.Generator;
import com.speedment.common.codegen.Transform;
import com.speedment.common.codegen.model.trait.HasValue;
import static com.speedment.common.codegen.util.Formatting.ifelse;
/**
* A trait with the functionality to render models with the trait
* {@link HasValue}.
*
* @author Emil Forslund
* @param <M> The model type
* @see Transform
*/
public interface HasValueView<M extends HasValue<M>> extends Transform<M, String> {
/**
* Render the value of the model if it exists, else an empty string.
*
* @param gen the generator
* @param model the model
* @return the generated code
*/
default String renderValue(Generator gen, M model) {
return ifelse(model.getValue(),
v -> " = " + gen.on(v).orElse(""),
""
);
}
}