/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.asakusafw.utils.java.internal.model.util;
import java.net.URI;
import java.net.URISyntaxException;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import com.asakusafw.utils.java.model.syntax.Attribute;
import com.asakusafw.utils.java.model.syntax.CompilationUnit;
import com.asakusafw.utils.java.model.syntax.Modifier;
import com.asakusafw.utils.java.model.syntax.ModifierKind;
import com.asakusafw.utils.java.model.syntax.PackageDeclaration;
import com.asakusafw.utils.java.model.syntax.TypeDeclaration;
/**
* {@link CompilationUnit}をJavaのソースファイルとみなす。
*/
public class CompilationUnitJavaFile extends SimpleJavaFileObject {
/**
* このファイルのスキーマ名。
*/
public static final String URI_SCHEME = CompilationUnitJavaFile.class.getName();
private CompilationUnit unit;
/**
* インスタンスを生成する。
* @param unit コンパイル対象のモデル
* @throws IllegalArgumentException 引数に{@code null}が含まれる場合
*/
public CompilationUnitJavaFile(CompilationUnit unit) {
super(toUri(unit), JavaFileObject.Kind.SOURCE);
this.unit = unit;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return unit.toString();
}
private static URI toUri(CompilationUnit unit) {
if (unit == null) {
throw new IllegalArgumentException("unit must not be null"); //$NON-NLS-1$
}
String path = toPath(unit);
try {
return new URI(URI_SCHEME, null, "/" + path, null);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
}
private static String toPath(CompilationUnit unit) {
assert unit != null;
StringBuilder buf = new StringBuilder();
PackageDeclaration packageDeclaration = unit.getPackageDeclaration();
if (packageDeclaration != null) {
String pkg = packageDeclaration.getName().toNameString().replace('.', '/');
buf.append(pkg);
buf.append('/');
}
TypeDeclaration primaryType = findPrimaryType(unit);
if (primaryType != null) {
buf.append(primaryType.getName().toNameString());
} else {
buf.append("package-info");
}
buf.append(".java");
return buf.toString();
}
private static TypeDeclaration findPrimaryType(CompilationUnit unit) {
assert unit != null;
TypeDeclaration first = null;
for (TypeDeclaration decl : unit.getTypeDeclarations()) {
if (first == null) {
first = decl;
}
for (Attribute attribute : decl.getModifiers()) {
if (attribute instanceof Modifier) {
Modifier modifier = (Modifier) attribute;
if (modifier.getModifierKind() == ModifierKind.PUBLIC) {
return decl;
}
}
}
}
return first;
}
}