org.springframework.boot.loader.tools

Class JarWriter

java.lang.Object

org.springframework.boot.loader.tools.JarWriter

All Implemented Interfaces:

AutoCloseable, LoaderClassesWriter

public class JarWriter
extends Object
implements LoaderClassesWriter, AutoCloseable

Writes JAR content, ensuring valid directory entries are always created and duplicate items are ignored.

Author:

Phillip Webb, Andy Wilkinson

Constructor Summary

Constructors

Constructor and Description
JarWriter(File file) Create a new JarWriter instance.
JarWriter(File file, LaunchScript launchScript) Create a new JarWriter instance.

Method Summary

Modifier and Type	Method and Description
void	close() Close the writer.
void	writeEntries(JarFile jarFile) Write all entries from the specified jar file.
void	writeEntry(String entryName, InputStream inputStream) Writes an entry.
void	writeLoaderClasses() Write the required spring-boot-loader classes to the JAR.
void	writeLoaderClasses(String loaderJarResourceName) Write the required spring-boot-loader classes to the JAR.
void	writeManifest(Manifest manifest) Write the specified manifest.
void	writeNestedLibrary(String destination, Library library) Write a nested library.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JarWriter

public JarWriter(File file)
          throws FileNotFoundException,
                 IOException

Create a new JarWriter instance.

Parameters:

file - the file to write

Throws:

IOException - if the file cannot be opened

FileNotFoundException - if the file cannot be found

JarWriter

public JarWriter(File file,
                 LaunchScript launchScript)
          throws FileNotFoundException,
                 IOException

Create a new JarWriter instance.

Parameters:

file - the file to write

launchScript - an optional launch script to prepend to the front of the jar

Throws:

IOException - if the file cannot be opened

FileNotFoundException - if the file cannot be found

Method Detail

writeManifest

public void writeManifest(Manifest manifest)
                   throws IOException

Write the specified manifest.

Parameters:

manifest - the manifest to write

Throws:

IOException - of the manifest cannot be written

writeEntries

public void writeEntries(JarFile jarFile)
                  throws IOException

Write all entries from the specified jar file.

Parameters:

jarFile - the source jar file

Throws:

IOException - if the entries cannot be written

writeEntry

public void writeEntry(String entryName,
                       InputStream inputStream)
                throws IOException

Writes an entry. The inputStream is closed once the entry has been written

Specified by:

writeEntry in interface LoaderClassesWriter

Parameters:

entryName - the name of the entry

inputStream - the stream from which the entry's data can be read

Throws:

IOException - if the write fails

writeNestedLibrary

public void writeNestedLibrary(String destination,
                               Library library)
                        throws IOException

Write a nested library.

Parameters:

destination - the destination of the library

library - the library

Throws:

IOException - if the write fails

writeLoaderClasses

public void writeLoaderClasses()
                        throws IOException

Write the required spring-boot-loader classes to the JAR.

Specified by:

writeLoaderClasses in interface LoaderClassesWriter

Throws:

IOException - if the classes cannot be written

writeLoaderClasses

public void writeLoaderClasses(String loaderJarResourceName)
                        throws IOException

Write the required spring-boot-loader classes to the JAR.

Specified by:

writeLoaderClasses in interface LoaderClassesWriter

Parameters:

loaderJarResourceName - the name of the resource containing the loader classes to be written

Throws:

IOException - if the classes cannot be written

close

public void close()
           throws IOException

Close the writer.

Specified by:

close in interface AutoCloseable

Throws:

IOException - if the file cannot be closed