org.codehaus.mojo.jaxb2.AbstractJaxbMojo Maven / Gradle / Ivy
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Mojo's JAXB-2 Maven plugin is used to create an object graph
from XSDs based on the JAXB 2.x implementation and to generate XSDs
from JAXB annotated Java classes.
package org.codehaus.mojo.jaxb2;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import org.apache.maven.model.Resource;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugin.logging.Log;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;
import org.codehaus.mojo.jaxb2.shared.FileSystemUtilities;
import org.codehaus.mojo.jaxb2.shared.Validate;
import org.codehaus.mojo.jaxb2.shared.environment.EnvironmentFacet;
import org.codehaus.mojo.jaxb2.shared.filters.Filter;
import org.codehaus.mojo.jaxb2.shared.filters.pattern.FileFilterAdapter;
import org.codehaus.mojo.jaxb2.shared.filters.pattern.PatternFileFilter;
import org.codehaus.mojo.jaxb2.shared.version.DependencyInfo;
import org.codehaus.mojo.jaxb2.shared.version.DependsFileParser;
import org.sonatype.plexus.build.incremental.BuildContext;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.regex.Pattern;
/**
* Abstract Mojo which collects common infrastructure, required and needed
* by all subclass Mojos in the JAXB2 maven plugin codebase.
*
* @author Lennart Jörelid
*/
public abstract class AbstractJaxbMojo extends AbstractMojo {
/**
* Standard name of the generated JAXB episode file.
*/
public static final String STANDARD_EPISODE_FILENAME = "sun-jaxb.episode";
/**
* Standard name of the package-info.java file which may contain
* JAXB annotations and Package JavaDoc.
*/
public static final String PACKAGE_INFO_FILENAME = "package-info.java";
/**
* Platform-independent newline control string.
*/
public static final String NEWLINE = System.getProperty("line.separator");
/**
* Pattern matching strings containing whitespace (or consisting only of whitespace).
*/
public static final Pattern CONTAINS_WHITESPACE = Pattern.compile("(\\S*\\s+\\S*)+", Pattern.UNICODE_CASE);
/**
* Standard excludes Filters for all Java generator Mojos.
* The List is unmodifiable, and contains Filters on the following form:
*
*
* // The standard exclude filters contain simple, exclude pattern filters.
* final List<Filter<File>> tmp = new ArrayList<Filter<File>>();
* tmp.add(new PatternFileFilter(Arrays.asList({"README.*", "\\.xml", "\\.txt"}), true));
* tmp.add(new FileFilterAdapter(new FileFilter() {
*
* @Override
* public boolean accept(final File aFileOrDir) {
*
* // Check sanity
* if (aFileOrDir == null) {
* return false;
* }
*
* final String name = aFileOrDir.getName();
*
* // Ignore hidden files and CVS directories
* return name.startsWith(".")
* || (aFileOrDir.isDirectory() && name.equals("CVS"));
*
* }
* }));
*
*
* Note! Since the plugin is currently developed in jdk 1.7-compliant code, we cannot
* use lambdas within Filters just yet.
*/
public static final List> STANDARD_EXCLUDE_FILTERS;
private static final List RELEVANT_GROUPIDS =
Arrays.asList("com.sun.xml.bind", "jakarta.xml.bind");
private static final String OWN_ARTIFACT_ID = "jaxb2-maven-plugin";
private static final String SYSTEM_FILE_ENCODING_PROPERTY = "file.encoding";
private static final String[] STANDARD_EXCLUDE_SUFFIXES = {"README.*", "\\.xml", "\\.txt"};
private static final String[] STANDARD_PRELOADED_CLASSES = {
"com.sun.tools.xjc.addon.episode.package-info",
"com.sun.tools.xjc.reader.xmlschema.bindinfo.package-info",
"org.glassfish.jaxb.core.v2.model.core.package-info",
"org.glassfish.jaxb.runtime.v2.model.runtime.package-info",
"org.glassfish.jaxb.core.v2.schemagen.episode.package-info",
"org.glassfish.jaxb.runtime.v2.schemagen.xmlschema.package-info"
};
static {
// The standard exclude filters contain simple, exclude pattern filters.
final List> tmp = new ArrayList>();
tmp.add(new PatternFileFilter(Arrays.asList(STANDARD_EXCLUDE_SUFFIXES), true));
tmp.add(new FileFilterAdapter(new FileFilter() {
@Override
public boolean accept(final File aFileOrDir) {
// Check sanity
if (aFileOrDir == null) {
return false;
}
final String name = aFileOrDir.getName();
// Ignore hidden files and CVS directories
return name.startsWith(".")
|| (aFileOrDir.isDirectory() && name.equals("CVS"));
}
}));
// Make STANDARD_EXCLUDE_FILTERS be unmodifiable.
STANDARD_EXCLUDE_FILTERS = Collections.unmodifiableList(tmp);
// TODO: These are hardcoded. Move to overridable using a system property?
// Preload relevant package-info classes to work around MNG-6506.
try {
final ClassLoader cl = AbstractJaxbMojo.class.getClassLoader();
for(String current : STANDARD_PRELOADED_CLASSES) {
cl.loadClass(current);
}
} catch (ClassNotFoundException ex) {
throw new Error(ex);
}
}
/**
* The Plexus BuildContext is used to identify files or directories modified since last build,
* implying functionality used to define if java generation must be performed again.
*/
@Component
private BuildContext buildContext;
/**
* The injected Maven project.
*/
@Parameter(defaultValue = "${project}", readonly = true)
private MavenProject project;
/**
* Note that the execution parameter will be injected ONLY if this plugin is executed as part
* of a maven standard lifecycle - as opposed to directly invoked with a direct invocation.
* When firing this mojo directly (i.e. {@code mvn xjc:something} or {@code mvn schemagen:something}), the
* {@code execution} object will not be injected.
*/
@Parameter(defaultValue = "${mojoExecution}", readonly = true)
private MojoExecution execution;
/**
* The directory where the staleFile is found.
* The staleFile assists in determining if re-generation of JAXB build products is required.
* While it is permitted to re-define the staleFileDirectory, it is recommended to keep it
* below the ${project.build.directory}, to ensure that JAXB code or XSD re-generation
* occurs after cleaning the project.
*
* @since 2.0
*/
@Parameter(defaultValue = "${project.build.directory}/jaxb2", readonly = true, required = true)
protected File staleFileDirectory;
/**
* Defines the encoding used by XJC (for generating Java Source files) and schemagen (for generating XSDs).
* The corresponding argument parameter for XJC and SchemaGen is: {@code encoding}.
* The algorithm for finding the encoding to use is as follows
* (where the first non-null value found is used for encoding):
*
* - If the configuration property is explicitly given within the plugin's configuration, use that value.
* - If the Maven property
project.build.sourceEncoding is defined, use its value.
* - Otherwise use the value from the system property
file.encoding.
*
*
*
* @see #getEncoding(boolean)
* @since 2.0
*/
@Parameter(defaultValue = "${project.build.sourceEncoding}")
private String encoding;
/**
* A Locale definition to create and set the system (default) Locale when the XJB or SchemaGen tools executes.
* The Locale will be reset to its default value after the execution of XJC or SchemaGen is complete.
* The configuration parameter must be supplied on the form {@code language[,country[,variant]]},
* such as {@code sv,SE} or {@code fr}. Refer to
* {@code org.codehaus.mojo.jaxb2.shared.environment.locale.LocaleFacet.createFor(String, Log)} for further
* information.
* Example (assigns french locale):
*
*
* <configuration>
* <locale>fr</locale>
* </configuration>
*
*
*
* @see org.codehaus.mojo.jaxb2.shared.environment.locale.LocaleFacet#createFor(String, Log)
* @see Locale#getAvailableLocales()
* @since 2.2
*/
@Parameter(required = false)
protected String locale;
/**
* Defines a set of extra EnvironmentFacet instances which are used to further configure the
* ToolExecutionEnvironment used by this plugin to fire XJC or SchemaGen.
* Example: If you implement the EnvironmentFacet interface in the class
* {@code org.acme.MyCoolEnvironmentFacetImplementation}, its {@code setup()} method is called before the
* XJC or SchemaGen tools are executed to setup some facet of their Execution environment. Correspondingly, the
* {@code restore()} method in your {@code org.acme.MyCoolEnvironmentFacetImplementation} class is invoked after
* the XJC or SchemaGen execution terminates.
*
*
* <configuration>
* ...
* <extraFacets>
* <extraFacet implementation="org.acme.MyCoolEnvironmentFacetImplementation" />
* </extraFacets>
* ...
* </configuration>
*
*
*
* @see EnvironmentFacet
* @see org.codehaus.mojo.jaxb2.shared.environment.ToolExecutionEnvironment#add(EnvironmentFacet)
* @since 2.2
*/
@Parameter(required = false)
protected List extraFacets;
/**
* Adds the supplied Resource to the project using the appropriate scope (i.e. resource or testResource)
* depending on the exact implementation of this AbstractJaxbMojo.
*
* @param resource The resource to add.
*/
protected abstract void addResource(final Resource resource);
/**
* The Plexus BuildContext is used to identify files or directories modified since last build,
* implying functionality used to define if java generation must be performed again.
*
* @return the active Plexus BuildContext.
*/
protected final BuildContext getBuildContext() {
return getInjectedObject(buildContext, "buildContext");
}
/**
* @return The active MavenProject.
*/
protected final MavenProject getProject() {
return getInjectedObject(project, "project");
}
/**
* @return The active MojoExecution.
*/
public MojoExecution getExecution() {
return getInjectedObject(execution, "execution");
}
/**
* {@inheritDoc}
*/
@Override
public final void execute() throws MojoExecutionException, MojoFailureException {
// 0) Get the log and its relevant level
final Log log = getLog();
final boolean isDebugEnabled = log.isDebugEnabled();
final boolean isInfoEnabled = log.isInfoEnabled();
// 1) Should we skip execution?
if (shouldExecutionBeSkipped()) {
if (isDebugEnabled) {
log.debug("Skipping execution, as instructed.");
}
return;
}
// 2) Printout relevant version information.
if (isDebugEnabled) {
logPluginAndJaxbDependencyInfo();
}
// 3) Are generated files stale?
if (isReGenerationRequired()) {
if (performExecution()) {
// As instructed by the performExecution() method, update
// the timestamp of the stale File.
updateStaleFileTimestamp();
// Hack to support M2E
buildContext.refresh(getOutputDirectory());
} else if (isInfoEnabled) {
log.info("Not updating staleFile timestamp as instructed.");
}
} else if (isInfoEnabled) {
log.info("No changes detected in schema or binding files - skipping JAXB generation.");
}
// 4) If the output directories exist, add them to the MavenProject's source directories
if (getOutputDirectory().exists() && getOutputDirectory().isDirectory()) {
final String canonicalPathToOutputDirectory = FileSystemUtilities.getCanonicalPath(getOutputDirectory());
if (log.isDebugEnabled()) {
log.debug("Adding existing JAXB outputDirectory [" + canonicalPathToOutputDirectory
+ "] to Maven's sources.");
}
// Add the output Directory.
getProject().addCompileSourceRoot(canonicalPathToOutputDirectory);
}
}
/**
* Implement this method to check if this AbstractJaxbMojo should skip executing altogether.
*
* @return {@code true} to indicate that this AbstractJaxbMojo should bail out of its execute method.
*/
protected abstract boolean shouldExecutionBeSkipped();
/**
* @return {@code true} to indicate that this AbstractJaxbMojo should be run since its generated files were
* either stale or not present, and {@code false} otherwise.
*/
protected abstract boolean isReGenerationRequired();
/**
* Implement this method to perform this Mojo's execution.
* This method will only be called if {@code !shouldExecutionBeSkipped() && isReGenerationRequired()}.
*
* @return {@code true} if the timestamp of the stale file should be updated.
* @throws MojoExecutionException if an unexpected problem occurs.
* Throwing this exception causes a "BUILD ERROR" message to be displayed.
* @throws MojoFailureException if an expected problem (such as a compilation failure) occurs.
* Throwing this exception causes a "BUILD FAILURE" message to be displayed.
*/
protected abstract boolean performExecution() throws MojoExecutionException, MojoFailureException;
/**
* Override this method to acquire a List holding all URLs to the sources which this
* AbstractJaxbMojo should use to produce its output (XSDs files for AbstractXsdGeneratorMojos and
* Java Source Code for AbstractJavaGeneratorMojos).
*
* @return A non-null List holding URLs to sources used by this AbstractJaxbMojo to produce its output.
*/
protected abstract List getSources();
/**
* Retrieves the directory where the generated files should be written to.
*
* @return the directory where the generated files should be written to.
*/
protected abstract File getOutputDirectory();
/**
* Retrieves the configured List of paths from which this AbstractJaxbMojo and its internal toolset
* (XJC or SchemaGen) should read bytecode classes.
*
* @return the configured List of paths from which this AbstractJaxbMojo and its internal toolset (XJC or
* SchemaGen) should read classes.
* @throws org.apache.maven.plugin.MojoExecutionException if the classpath could not be retrieved.
*/
protected abstract List getClasspath() throws MojoExecutionException;
/**
* Convenience method to invoke when some plugin configuration is incorrect.
* Will output the problem as a warning with some degree of log formatting.
*
* @param propertyName The name of the problematic property.
* @param description The problem description.
*/
@SuppressWarnings("all")
protected void warnAboutIncorrectPluginConfiguration(final String propertyName, final String description) {
final StringBuilder builder = new StringBuilder();
builder.append("\n+=================== [Incorrect Plugin Configuration Detected]\n");
builder.append("|\n");
builder.append("| Property : " + propertyName + "\n");
builder.append("| Problem : " + description + "\n");
builder.append("|\n");
builder.append("+=================== [End Incorrect Plugin Configuration Detected]\n\n");
getLog().warn(builder.toString().replace("\n", NEWLINE));
}
/**
* @param arguments The final arguments to be passed to a JAXB tool (XJC or SchemaGen).
* @param toolName The name of the tool.
* @return the arguments, untouched.
*/
protected final String[] logAndReturnToolArguments(final String[] arguments, final String toolName) {
// Check sanity
Validate.notNull(arguments, "arguments");
if (getLog().isDebugEnabled()) {
final StringBuilder argBuilder = new StringBuilder();
argBuilder.append("\n+=================== [" + arguments.length + " " + toolName + " Arguments]\n");
argBuilder.append("|\n");
for (int i = 0; i < arguments.length; i++) {
argBuilder.append("| [").append(i).append("]: ").append(arguments[i]).append("\n");
}
argBuilder.append("|\n");
argBuilder.append("+=================== [End " + arguments.length + " " + toolName + " Arguments]\n\n");
getLog().debug(argBuilder.toString().replace("\n", NEWLINE));
}
// All done.
return arguments;
}
/**
* Retrieves the last name part of the stale file.
* The full name of the stale file will be generated by pre-pending {@code "." + getExecution().getExecutionId()}
* before this staleFileName.
*
* @return The name of the stale file used by this AbstractJavaGeneratorMojo to detect staleness amongst its
* generated files.
*/
protected abstract String getStaleFileName();
/**
* Acquires the staleFile for this execution
*
* @return the staleFile (used to define where) for this execution
*/
protected final File getStaleFile() {
final String staleFileName = "."
+ (getExecution() == null ? "nonExecutionJaxb" : getExecution().getExecutionId())
+ "-" + getStaleFileName();
return new File(staleFileDirectory, staleFileName);
}
/**
* The algorithm for finding the encoding to use is as follows (where the first non-null value found
* is used for encoding):
*
* - If the configuration property is explicitly given within the plugin's configuration, use that value.
* - If the Maven property
project.build.sourceEncoding is defined, use its value.
* - Otherwise use the value from the system property
file.encoding.
*
*
* @param warnIfPlatformEncoding Defines if a warning should be logged if encoding is not configured but
* the platform encoding (system property {@code file.encoding}) is used
* @return The encoding to be used by this AbstractJaxbMojo and its tools.
* @see #encoding
*/
protected final String getEncoding(final boolean warnIfPlatformEncoding) {
// Harvest information
final boolean configuredEncoding = encoding != null;
final String fileEncoding = System.getProperty(SYSTEM_FILE_ENCODING_PROPERTY);
final String effectiveEncoding = configuredEncoding ? encoding : fileEncoding;
// Should we warn if using platform encoding (i.e. platform dependent)?
if (!configuredEncoding && warnIfPlatformEncoding) {
getLog().warn("Using platform encoding [" + effectiveEncoding + "], i.e. build is platform dependent!");
} else if (getLog().isDebugEnabled()) {
getLog().debug("Using " + (configuredEncoding ? "explicitly configured" : "system property")
+ " encoding [" + effectiveEncoding + "]");
}
// All Done.
return effectiveEncoding;
}
/**
* Retrieves a File to the JAXB Episode (which is normally written during the XJC process).
* Moreover, ensures that the parent directory of that File is created, to enable writing the File.
*
* @param episodeFileName {@code null} to indicate that the standard episode file name ("sun-jaxb.episode")
* should be used, and otherwise a non-empty name which should be used
* as the episode file name.
* @return A non-null File where the JAXB episode file should be written.
* @throws MojoExecutionException if the parent directory of the episode file could not be created.
*/
protected File getEpisodeFile(final String episodeFileName) throws MojoExecutionException {
// Get the execution ID
final String executionID = getExecution() != null && getExecution().getExecutionId() != null
? getExecution().getExecutionId()
: null;
final String effectiveEpisodeFileName = episodeFileName == null
? (executionID == null ? STANDARD_EPISODE_FILENAME : "episode_" + executionID)
: episodeFileName;
if (effectiveEpisodeFileName.isEmpty()) {
throw new MojoExecutionException("Cannot handle null or empty JAXB Episode filename. "
+ "Check 'episodeFileName' configuration property.");
}
// Find or create the episode directory.
final Path episodePath;
final File generatedJaxbEpisodeDirectory;
try {
final Path path = Paths.get(getOutputDirectory().getAbsolutePath(), "META-INF", "JAXB");
episodePath = java.nio.file.Files.createDirectories(path);
generatedJaxbEpisodeDirectory = episodePath.toFile();
if (getLog().isInfoEnabled()) {
getLog().info("Created EpisodePath [" + episodePath.toString() + "]: " +
(generatedJaxbEpisodeDirectory.exists() && generatedJaxbEpisodeDirectory.isDirectory()));
}
} catch (IOException e) {
throw new MojoExecutionException("Could not create output directory.", e);
}
if (!generatedJaxbEpisodeDirectory.exists() || !generatedJaxbEpisodeDirectory.isDirectory()) {
throw new MojoExecutionException("Could not create directory [" + episodePath.toString() + "]");
}
// Is there already an episode file here?
File episodeFile = new File(generatedJaxbEpisodeDirectory, effectiveEpisodeFileName + ".xjb");
final AtomicInteger index = new AtomicInteger(1);
while (episodeFile.exists()) {
episodeFile = new File(generatedJaxbEpisodeDirectory,
effectiveEpisodeFileName + "_" + index.getAndIncrement() + ".xjb");
}
// Add the (generated) outputDirectory to the Resources.
final Resource outputDirectoryResource = new Resource();
outputDirectoryResource.setDirectory(getOutputDirectory().getAbsolutePath());
outputDirectoryResource.setIncludes(Collections.singletonList("**/" + episodeFile.getName()));
this.addResource(outputDirectoryResource);
// All Done.
return episodeFile;
}
//
// Private helpers
//
private void logPluginAndJaxbDependencyInfo() {
if (getLog().isDebugEnabled()) {
final StringBuilder builder = new StringBuilder();
builder.append("\n+=================== [Brief Plugin Build Dependency Information]\n");
builder.append("|\n");
builder.append("| Note: These dependencies pertain to what was used to build *the plugin*.\n");
builder.append("| Check project dependencies to see the ones used in *your build*.\n");
builder.append("|\n");
// Find the dependency and version information within the dependencies.properties file.
final SortedMap versionMap = DependsFileParser.getVersionMap(OWN_ARTIFACT_ID);
builder.append("|\n");
builder.append("| Plugin's own information\n");
builder.append("| GroupId : " + versionMap.get(DependsFileParser.OWN_GROUPID_KEY) + "\n");
builder.append("| ArtifactID : " + versionMap.get(DependsFileParser.OWN_ARTIFACTID_KEY) + "\n");
builder.append("| Version : " + versionMap.get(DependsFileParser.OWN_VERSION_KEY) + "\n");
builder.append("| Buildtime : " + versionMap.get(DependsFileParser.BUILDTIME_KEY) + "\n");
builder.append("|\n");
builder.append("| Plugin's JAXB-related dependencies\n");
builder.append("|\n");
final SortedMap diMap = DependsFileParser.createDependencyInfoMap(versionMap);
int dependencyIndex = 0;
for (Map.Entry current : diMap.entrySet()) {
final String key = current.getKey().trim();
for (String currentRelevantGroupId : RELEVANT_GROUPIDS) {
if (key.startsWith(currentRelevantGroupId)) {
final DependencyInfo di = current.getValue();
builder.append("| " + (++dependencyIndex) + ") [" + di.getArtifactId() + "]\n");
builder.append("| GroupId : " + di.getGroupId() + "\n");
builder.append("| ArtifactID : " + di.getArtifactId() + "\n");
builder.append("| Version : " + di.getVersion() + "\n");
builder.append("| Scope : " + di.getScope() + "\n");
builder.append("| Type : " + di.getType() + "\n");
builder.append("|\n");
}
}
}
builder.append("+=================== [End Brief Plugin Build Dependency Information]\n\n");
getLog().debug(builder.toString().replace("\n", NEWLINE));
}
}
private T getInjectedObject(final T objectOrNull, final String objectName) {
if (objectOrNull == null) {
getLog().error(
"Found null '" + objectName + "', implying that Maven @Component injection was not done properly.");
}
return objectOrNull;
}
private void updateStaleFileTimestamp() throws MojoExecutionException {
final File staleFile = getStaleFile();
if (!staleFile.exists()) {
// Ensure that the staleFileDirectory exists
FileSystemUtilities.createDirectory(staleFile.getParentFile(), false);
try {
staleFile.createNewFile();
if (getLog().isDebugEnabled()) {
getLog().debug("Created staleFile [" + FileSystemUtilities.getCanonicalPath(staleFile) + "]");
}
} catch (IOException e) {
throw new MojoExecutionException("Could not create staleFile.", e);
}
} else {
if (!staleFile.setLastModified(System.currentTimeMillis())) {
getLog().warn("Failed updating modification time of staleFile ["
+ FileSystemUtilities.getCanonicalPath(staleFile) + "]");
}
}
}
/**
* Prints out the system properties to the Maven Log at Debug level.
*/
protected void logSystemPropertiesAndBasedir() {
if (getLog().isDebugEnabled()) {
final StringBuilder builder = new StringBuilder();
builder.append("\n+=================== [System properties]\n");
builder.append("|\n");
// Sort the system properties
final SortedMap props = new TreeMap();
props.put("basedir", FileSystemUtilities.getCanonicalPath(getProject().getBasedir()));
for (Map.Entry current : System.getProperties().entrySet()) {
props.put("" + current.getKey(), current.getValue());
}
for (Map.Entry current : props.entrySet()) {
builder.append("| [" + current.getKey() + "]: " + current.getValue() + "\n");
}
builder.append("|\n");
builder.append("+=================== [End System properties]\n");
// All done.
getLog().debug(builder.toString().replace("\n", NEWLINE));
}
}
}