com.bazaarvoice.maven.plugin.s3repo.util.XmlUtils Maven / Gradle / Ivy

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Create or update an S3 YUM repository.

There is a newer version: 3.7

package com.bazaarvoice.maven.plugin.s3repo.util;

import org.apache.maven.plugin.MojoExecutionException;
import org.w3c.dom.Document;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

public final class XmlUtils {

    private XmlUtils() {}

    /** Parse the provided {@link File} as XML, decompressing it first if it has a .gz file extension. */
    public static Document parseXmlFile(File file) throws MojoExecutionException {
        InputStream in = toInputStream(file);
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setNamespaceAware(true);
            DocumentBuilder builder = factory.newDocumentBuilder();
            return builder.parse(in);
        } catch (Exception e) {
            throw new MojoExecutionException("failed to parse", e);
        } finally {
            ExtraIOUtils.closeQuietly(in);
        }
    }

    private static InputStream toInputStream(File file) throws MojoExecutionException {
        try {
            InputStream in = new FileInputStream(file);
            if (file.getName().endsWith(".gz")) {
                in = new GZIPInputStream(in);
            }
            return in;
        } catch (IOException e) {
            throw new MojoExecutionException("Failed to read file " + file.getPath(), e);
        }
    }


}