/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* 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 jetbrains.mps.persistence;
import jetbrains.mps.extapi.persistence.SourceRoot;
import jetbrains.mps.util.FileUtil;
import jetbrains.mps.util.NameUtil;
import jetbrains.mps.vfs.IFile;
import jetbrains.mps.vfs.path.Path;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.annotations.Immutable;
import org.jetbrains.mps.openapi.persistence.ModelFactory;
import org.jetbrains.mps.openapi.persistence.ModelRoot;
import static jetbrains.mps.project.MPSExtentions.DOT;
/**
* In the case when we have some models on the disk (under a source root)
* and try to collect them by traversing a file system tree
* we need to be able to construct model name from the path to the model file.
*
* Created by apyshkin on 12/20/16.
*/
@Immutable
public final class ModelNameCalculator {
private static final Logger LOG = LogManager.getLogger(ModelNameCalculator.class);
@NotNull private final ModelRoot myModelRoot;
@NotNull private final SourceRoot mySourceRoot;
@NotNull private final IFile myModelFile; // always a file (not directory!)
public ModelNameCalculator(@NotNull ModelRoot modelRoot,
@NotNull SourceRoot sourceRoot,
@NotNull IFile modelFile) {
myModelRoot = modelRoot;
mySourceRoot = sourceRoot;
myModelFile = modelFile;
}
@NotNull
private String calcRelPathFromSourceRootToModelFile() {
String pathToModelDir = myModelFile.getParent().getPath();
String sourceRootPath = mySourceRoot.getAbsolutePath().getPath();
assert FileUtil.isAncestor(sourceRootPath, pathToModelDir);
return FileUtil.getRelativePath(pathToModelDir, sourceRootPath, Path.UNIX_SEPARATOR);
}
/**
* For example sometimes the path to the model file is 'models/org/my/package/a.mps' with 'models' as a source root.
* Then the model fq name is 'org.my.package.a'.
* Sometimes the path (per-root) is 'models/org.my.package.a/.model' with 'models' as a source root
* In this case the model fq name is 'org.my.package.a' as well.
*/
@NotNull
public String calcModelFqName() {
String relPathFromSourceRoot = calcRelPathFromSourceRootToModelFile();
String fileNameWE = FileUtil.getNameWithoutExtension(myModelFile.getName());
String prefixPackage = NameUtil.namespaceFromPath(relPathFromSourceRoot);
String result = join(prefixPackage, fileNameWE);
return appendModuleFqNameIfNeeded(result);
}
/**
* we allow both full fq name expanded into file directories like 'jetbrains.mps.my.own.model' model name
* corresponds to the '<<SOURCE_ROOT>>/jetbrains/mps/my/own/model.mps' path in the default model persistence
* AND
* short-style file system storage where the same model would correspond to the
* simple '<<SOURCE_ROOT>>/model.mps' path in the default model persistence
*
* We force the package prefix to be the same as the module package.
*/
@NotNull
private String appendModuleFqNameIfNeeded(@NotNull String modelFqName) {
String moduleFqName = myModelRoot.getModule().getModuleName();
if (!modelFqName.contains(DOT)) {
modelFqName = moduleFqName + DOT + modelFqName;
} else {
if (!modelFqName.startsWith(moduleFqName + DOT)) {
LOG.error(String.format("Model fq namespace '%s' conflicts with the module fq namespace '%s'", modelFqName, moduleFqName));
}
}
return modelFqName;
}
@NotNull
private static String join(@NotNull String prefixPackage, @NotNull String suffixPackage) {
if (prefixPackage.isEmpty()) {
return suffixPackage;
}
if (suffixPackage.isEmpty()) {
return prefixPackage;
}
return prefixPackage + DOT + suffixPackage;
}
}