org.springframework.cloud.internal.PomReader Maven / Gradle / Ivy
/*
* Copyright 2013-2020 the original author or authors.
*
* 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
*
* https://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 org.springframework.cloud.internal;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.nio.file.Files;
import org.apache.maven.model.Model;
import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
/**
* Class that reads poms as {@link Model}.
*
* @author Marcin Grzejszczak
*/
final class PomReader {
private PomReader() {
throw new IllegalStateException("Shouldn't instantiate a utility class");
}
/**
* Returns a parsed POM.
* @param pom location to the pom
* @return parsed model
*/
public static Model readPom(File pom) {
if (!pom.exists()) {
throw new IllegalStateException("File [" + pom.getAbsolutePath() + "] not found");
}
String fileText = "";
try (Reader reader = new FileReader(pom)) {
if (pom.isFile()) {
fileText = new String(Files.readAllBytes(pom.toPath()));
}
MavenXpp3Reader xpp3Reader = new MavenXpp3Reader();
return xpp3Reader.read(reader);
}
catch (XmlPullParserException | IOException e) {
if (pom.isFile() && fileText.length() == 0) {
throw new IllegalStateException("File [" + pom.getAbsolutePath() + "] is empty", e);
}
throw new IllegalStateException("Failed to read file: " + pom.getAbsolutePath(), e);
}
}
}