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/*
* Copyright 2016 Federico Tomassetti
*
* 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.github.javaparser.symbolsolver.resolution.typesolvers;
import com.github.javaparser.JavaParser;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.resolution.declarations.ResolvedReferenceTypeDeclaration;
import com.github.javaparser.symbolsolver.javaparser.Navigator;
import com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade;
import com.github.javaparser.symbolsolver.model.resolution.SymbolReference;
import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
/**
* @author Federico Tomassetti
*/
public class JavaParserTypeSolver implements TypeSolver {
private File srcDir;
private TypeSolver parent;
private Cache<String, Optional<CompilationUnit>> parsedFiles = CacheBuilder.newBuilder().softValues().build();
private Cache<String, List<CompilationUnit>> parsedDirectories = CacheBuilder.newBuilder().softValues().build();
private Cache<String, SymbolReference<ResolvedReferenceTypeDeclaration>> foundTypes = CacheBuilder.newBuilder().softValues().build();
public JavaParserTypeSolver(File srcDir) {
if (!srcDir.exists() || !srcDir.isDirectory()) {
throw new IllegalStateException("SrcDir does not exist or is not a directory: " + srcDir.getAbsolutePath());
}
this.srcDir = srcDir;
}
@Override
public String toString() {
return "JavaParserTypeSolver{" +
"srcDir=" + srcDir +
", parent=" + parent +
'}';
}
@Override
public TypeSolver getParent() {
return parent;
}
@Override
public void setParent(TypeSolver parent) {
this.parent = parent;
}
private Optional<CompilationUnit> parse(File srcFile) {
try {
return parsedFiles.get(srcFile.getAbsolutePath(), () -> {
Optional<CompilationUnit> cu;
try {
cu = Optional.of(JavaParser.parse(srcFile));
} catch (FileNotFoundException e) {
cu = Optional.empty();
} catch (RuntimeException e) {
throw new RuntimeException("Issue while parsing " + srcFile.getAbsolutePath(), e);
}
return cu;
});
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
}
private List<CompilationUnit> parseDirectory(File srcDirectory) {
try {
return parsedDirectories.get(srcDirectory.getAbsolutePath(), () -> {
List<CompilationUnit> units = new ArrayList<>();
File[] files = srcDirectory.listFiles();
if (files != null) {
for (File file : files) {
if (file.getName().toLowerCase().endsWith(".java")) {
Optional<CompilationUnit> unit = parse(file);
if (unit.isPresent()) {
units.add(unit.get());
}
}
}
}
return units;
});
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
}
@Override
public SymbolReference<ResolvedReferenceTypeDeclaration> tryToSolveType(String name) {
// TODO support enums
// TODO support interfaces
try {
return foundTypes.get(name, () -> {
SymbolReference<ResolvedReferenceTypeDeclaration> result = tryToSolveTypeUncached(name);
if (result.isSolved()) {
return SymbolReference.solved(result.getCorrespondingDeclaration());
}
return result;
});
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
}
private SymbolReference<ResolvedReferenceTypeDeclaration> tryToSolveTypeUncached(String name) {
String[] nameElements = name.split("\\.");
for (int i = nameElements.length; i > 0; i--) {
String filePath = srcDir.getAbsolutePath();
for (int j = 0; j < i; j++) {
filePath += "/" + nameElements[j];
}
filePath += ".java";
String typeName = "";
for (int j = i - 1; j < nameElements.length; j++) {
if (j != i - 1) {
typeName += ".";
}
typeName += nameElements[j];
}
File srcFile = new File(filePath);
{
Optional<CompilationUnit> compilationUnit = parse(srcFile);
if (compilationUnit.isPresent()) {
Optional<com.github.javaparser.ast.body.TypeDeclaration<?>> astTypeDeclaration = Navigator.findType(compilationUnit.get(), typeName);
if (astTypeDeclaration.isPresent()) {
return SymbolReference.solved(JavaParserFacade.get(this).getTypeDeclaration(astTypeDeclaration.get()));
}
}
}
{
List<CompilationUnit> compilationUnits = parseDirectory(srcFile.getParentFile());
for (CompilationUnit compilationUnit : compilationUnits) {
Optional<com.github.javaparser.ast.body.TypeDeclaration<?>> astTypeDeclaration = Navigator.findType(compilationUnit, typeName);
if (astTypeDeclaration.isPresent()) {
return SymbolReference.solved(JavaParserFacade.get(this).getTypeDeclaration(astTypeDeclaration.get()));
}
}
}
}
return SymbolReference.unsolved(ResolvedReferenceTypeDeclaration.class);
}
}
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