return columnNumber;
    }

    public InputSource getSource() {
        return source;
    }

    public InputLocation getLocation(Object key) {
        return locations != null ? locations.get(key) : null;
    }

    public Map<Object, InputLocation> getLocations() {
        return locations;
    }

    /**
     * Gets the parent InputLocation where this InputLocation may have been imported from.

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }

        @Override
        public ModelSource2 getRelatedSource(String relPath) {
            Source rel = source.resolve(relPath);

        this.importedFrom = null;
    }

    /**
     * Get the path/URL of the POM or {@code null} if unknown.
     *
     * @return the location
     */
    public String getLocation() {
        return this.location;
    }

    /**
     * Get the identifier of the POM in the format {@code <groupId>:<artifactId>:<version>}.
     *
     * @return the model id
     */

import org.apache.maven.plugin.descriptor.io.PluginDescriptorStaxReader;
import org.apache.maven.plugin.descriptor.io.PluginDescriptorStaxWriter;

import static org.apache.maven.internal.impl.StaxLocation.getLocation;
import static org.apache.maven.internal.impl.StaxLocation.getMessage;
import static org.apache.maven.internal.impl.Utils.nonNull;

@Named
@Singleton
public class DefaultPluginXmlFactory implements PluginXmlFactory {

    }

    @Test
    void testGetLocation() {
        StringSource source = new StringSource("Hello World!");
        assertEquals("(memory)", source.getLocation());

        source = new StringSource("Hello World!", "LOCATION");
        assertEquals("LOCATION", source.getLocation());
    }

    @Test
    void testGetContent() {
        StringSource source = new StringSource(null);
        assertEquals("", source.getContent());

    }

    @Override
    public String getLocation() {
        return url.toString();
    }

    /**
     * Gets the URL of this source.
     *
     * @return The underlying URL, never {@code null}.
     */
    public URL getUrl() {
        return url;
    }

    @Override
    public String toString() {
        return getLocation();
    }

    @Override
    public int hashCode() {

    @Override
    public int getLineNumber() {
        return lineNumber;
    }

    @Override
    public int getColumnNumber() {
        return columnNumber;
    }

    @Override
    public String getLocation() {
        StringBuilder buffer = new StringBuilder(256);

        if (!getSource().isEmpty()) {
            if (buffer.length() > 0) {
                buffer.append(", ");
            }

                    return source.getInputStream();
                }

                @Override
                public String getLocation() {
                    return source.getLocation();
                }

                @Override
                public Source resolve(String relative) {
                    return null;
                }
            };

        this.hashCode = Objects.hash(path);
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return Files.newInputStream(path);
    }

    @Override
    public String getLocation() {
        return path.toString();
    }

    /**
     * Gets the file of this source.
     *
     * @return The underlying file, never {@code null}.
     * @deprecated Use {@link #getPath()} instead.

    @Nullable
    Reader getReader();

    @Nullable
    Transformer getTransformer();

    boolean isStrict();

    @Nullable
    String getModelId();

    @Nullable
    String getLocation();

    boolean isAddDefaultEntities();

    interface Transformer {
        /**
         * Interpolate the value read from the xml document
         *
         * @param source    The source value