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/*****************************************************************************
* Copyright (c) 2015 Christian W. Damus and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Christian W. Damus - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.tests.framework.m2t.xtend.templates
import java.util.Map
import com.google.common.collect.Maps
import com.google.common.base.Joiner
import com.google.common.collect.Iterables
import com.google.common.collect.Ordering
import javax.inject.Singleton
import java.io.File
/**
* Extensions for managing imports in generated Java files.
*/
@Singleton
class Importator {
Map<File, Map<String, String>> importsByFile = Maps.newHashMap
ThreadLocal<File> tlFile = new ThreadLocal;
def reset() {
imports.clear
}
def CharSequence managingImports(File file, () => CharSequence template) {
var CharSequence result = null
tlFile.set(file)
try {
result = importify(template.apply)
} finally {
tlFile.remove
importsByFile.remove(file)
}
result
}
private def file() {
tlFile.get
}
def imports() {
if (importsByFile.containsKey(file))
importsByFile.get(file)
else
Maps.newHashMap => [
importsByFile.put(file, it)
]
}
def String imported(String qualifiedClassName) {
val simpleName = qualifiedClassName.substring(qualifiedClassName.lastIndexOf('.') + 1)
val existing = imports.get(simpleName)
if ((simpleName == qualifiedClassName) || ((existing != null) && (existing != qualifiedClassName))) {
// Cannot import the same name again
qualifiedClassName
} else {
imports.put(simpleName, qualifiedClassName)
simpleName
}
}
def String markImports() {
"$$$imports$$$"
}
private def CharSequence importify(CharSequence text) {
val importsText = Joiner.on(System.getProperty("line.separator")).join(
Iterables.transform(Ordering.natural.sortedCopy(imports.values), [f|'import ' + f + ';'])
)
text.toString.replaceFirst("\\$\\$\\$imports\\$\\$\\$", importsText)
}
}
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