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/*
* Copyright (C) 2014 Google, Inc.
*
* 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.squareup.javapoet;
import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.processing.Filer;
import javax.lang.model.element.Element;
import javax.tools.JavaFileObject;
import static com.squareup.javapoet.Util.checkArgument;
/** Writes generated types to a filesystem using the standard directory structure. */
public final class JavaPoet {
private final List<JavaFile> javaFiles = new ArrayList<>();
private String indent = " ";
public JavaPoet setIndent(String indent) {
this.indent = indent;
return this;
}
public JavaPoet add(JavaFile javaFile) {
javaFiles.add(javaFile);
return this;
}
public JavaPoet add(String packageName, TypeSpec type) {
return add(JavaFile.builder(packageName, type).build());
}
public void writeTo(Path directory) throws IOException {
checkArgument(Files.notExists(directory) || Files.isDirectory(directory),
"path %s exists but is not a directory.", directory);
for (JavaFile javaFile : javaFiles) {
String packageName = javaFile.packageName;
Path outputDirectory = directory;
if (!packageName.isEmpty()) {
for (String packageComponent : packageName.split("\\.")) {
outputDirectory = outputDirectory.resolve(packageComponent);
}
Files.createDirectories(outputDirectory);
}
Path outputPath = outputDirectory.resolve(javaFile.typeSpec.name + ".java");
try (Writer writer = new OutputStreamWriter(Files.newOutputStream(outputPath))) {
javaFile.emit(writer, indent);
}
}
}
public void writeTo(File directory) throws IOException {
writeTo(directory.toPath());
}
public void writeTo(Filer filer) throws IOException {
for (JavaFile javaFile : javaFiles) {
String fileName = javaFile.packageName.isEmpty()
? javaFile.typeSpec.name
: javaFile.packageName + "." + javaFile.typeSpec.name;
List<Element> originatingElements = javaFile.typeSpec.originatingElements;
JavaFileObject filerSourceFile = filer.createSourceFile(fileName,
originatingElements.toArray(new Element[originatingElements.size()]));
try (Writer writer = filerSourceFile.openWriter()) {
javaFile.emit(writer, indent);
} catch (Exception e) {
try {
filerSourceFile.delete();
} catch (Exception ignored) {
}
throw e;
}
}
}
}
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