Builder.java

// Copyright 2013 Michel Kraemer
//
// 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 $pkg;

import java.util.Map;

<% for (i in additionalImports) { %>
import ${i};
<% } %>

/**
 * Builder for {@link $name}
 * @author Michel Kraemer
 */
public class ${name}Builder {
	<% for (p in requiredProps) { %>private ${p.type} ${p.normalizedName};
	<% } %>
	<% for (p in props) { %>private ${p.type} ${p.normalizedName};
	<% } %>
	
	public ${name}Builder(<% if (requiredProps.size > 1) { for (p in requiredProps[0..-2]) { %>${p.type} ${p.normalizedName},<% } } %><% if (!requiredProps.empty) { %>
			${toEllipse.call(requiredProps[-1].type)} ${requiredProps[-1].normalizedName}
			<% } %>) {
		<% for (p in requiredProps) { %>this.${p.normalizedName} = ${p.normalizedName};
		<% } %>
		<% for (p in props) { %>this.${p.normalizedName} = <% if (p.defval) { %>${p.defval}<% } else { %>null<% } %>;
		<% } %>
	}
	
	<% for (p in props) { %>
	public ${name}Builder ${p.normalizedName}(${toEllipse.call(p.type)} ${p.normalizedName}) {
		this.${p.normalizedName} = ${p.normalizedName};
		return this;
	}
	<% } %>
	
	/**
	 * Creates a builder that copies properties from the given original object
	 * @param original the original object
	 */
	public ${name}Builder($name original) {
		${requiredProps.collect({ p -> "this." + p.normalizedName + " = original." + toGetter.call(p.normalizedName) + "();" }).join('\n')}
		${props.collect({ p-> "this." + p.normalizedName + " = original." + toGetter.call(p.normalizedName) + "();" }).join('\n')}
	}
	
	public $name build() {
		return new $name(${requiredProps.collect({ p-> p.normalizedName }).join(',')}<% if (!requiredProps.empty && !props.empty) { %>,<% } %>${props.collect({ p -> p.normalizedName }).join(',')});
	}
	
	${additionalBuilderMethods.join('\n')}
}