|
Groovy example source code file (Newify.java)
The Groovy Newify.java source code/*
* Copyright 2008-2011 the original author or authors.
*
* 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 groovy.lang;
import org.codehaus.groovy.transform.GroovyASTTransformationClass;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Annotation that supports writing constructor call expressions without the 'new'
* keyword. Instead they can be written "Ruby-style" as a method call to a 'new'
* method or "Python-style" by just omitting the keyword missing.
* </p>
* It allows you to write code snippets like this ("Python-style"):
* <pre>
* {@code @Newify([Tree,Leaf])} class MyTreeProcessor {
* def myTree = Tree(Tree(Leaf("A"), Leaf("B")), Leaf("C"))
* def process() { ... }
* }
* </pre>
* or this ("Ruby-style"):
* <pre>
* {@code @Newify} class MyTreeProcessor {
* def myTree = Tree.new(Tree.new(Leaf.new("A"), Leaf.new("B")), Leaf.new("C"))
* def process() { ... }
* }
* </pre>
*
* After the AST transformation, the following code is passed on for further compilation:
* <pre>
* class MyTreeProcessor {
* def myTree = new Tree(new Tree(new Leaf("A"), new Leaf("B")), new Leaf("C"))
* def process() { ... }
* }
* </pre>
* The annotation can be used on a whole class as shown above or selectively on a particular
* method, constructor or field.
*
* The "Ruby-style" new conversions occur automatically unless the 'auto=false'
* flag is given when using the annotation. You might do this if you create a new method
* using meta programming.
*
* The "Python-style" conversions require you to specify each class on which you want them
* to apply. The transformation then works by matching the basename of the provided classes to any
* similarly named instance method calls not specifically bound to an object, i.e. associated
* with the 'this' object. In other words <code>Leaf("A") would be transformed to
* <code>new Leaf("A") but
Other Groovy examples (source code examples)Here is a short list of links related to this Groovy Newify.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.