ro.isdc.wro.extensions.processor.js
Class GoogleClosureCompressorProcessor

java.lang.Object
  ro.isdc.wro.extensions.processor.js.GoogleClosureCompressorProcessor

All Implemented Interfaces:

ResourcePostProcessor, ResourcePreProcessor

@Minimize
@SupportedResourceType(value=JS)
public class GoogleClosureCompressorProcessor
extends Object
implements ResourcePostProcessor, ResourcePreProcessor

Uses Google closure compiler for js minimization.

In order to make this class Context agnostic, set the encoding explicitly using setEncoding(String).

Author:

Alex Objelean

See Also:

http://blog.bolinfest.com/2009/11/calling-closure-compiler-from-java.html

Field Summary

static String	ALIAS_ADVANCED
static String	ALIAS_SIMPLE
static String	ALIAS_WHITESPACE_ONLY

Constructor Summary

GoogleClosureCompressorProcessor()
Uses google closure compiler with default compilation level: CompilationLevel.SIMPLE_OPTIMIZATIONS

GoogleClosureCompressorProcessor(com.google.javascript.jscomp.CompilationLevel compilationLevel)
Uses google closure compiler with specified compilation level.

Method Summary

protected com.google.javascript.jscomp.SourceFile[]	getExterns(Resource resource)
protected com.google.javascript.jscomp.CompilerOptions	newCompilerOptions()
protected void	onException(Exception e) Invoked when an exception occurs during processing.
void	process(Reader reader, Writer writer)
void	process(Resource resource, Reader reader, Writer writer)
GoogleClosureCompressorProcessor	setCompilationLevel(com.google.javascript.jscomp.CompilationLevel compilationLevel)
GoogleClosureCompressorProcessor	setCompilerOptions(com.google.javascript.jscomp.CompilerOptions compilerOptions)
GoogleClosureCompressorProcessor	setEncoding(String encoding)

Methods inherited from class java.lang.Object

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

Field Detail

ALIAS_SIMPLE

public static final String ALIAS_SIMPLE

See Also:

Constant Field Values

ALIAS_ADVANCED

public static final String ALIAS_ADVANCED

See Also:

Constant Field Values

ALIAS_WHITESPACE_ONLY

public static final String ALIAS_WHITESPACE_ONLY

See Also:

Constant Field Values

Constructor Detail

GoogleClosureCompressorProcessor

public GoogleClosureCompressorProcessor()

Uses google closure compiler with default compilation level: CompilationLevel.SIMPLE_OPTIMIZATIONS

GoogleClosureCompressorProcessor

public GoogleClosureCompressorProcessor(com.google.javascript.jscomp.CompilationLevel compilationLevel)

Uses google closure compiler with specified compilation level.

Parameters:

compilationLevel - not null CompilationLevel enum.

Method Detail

process

public void process(Resource resource,
                    Reader reader,
                    Writer writer)
             throws IOException

Specified by:

process in interface ResourcePreProcessor

Throws:

IOException

onException

protected void onException(Exception e)

Invoked when an exception occurs during processing. Default implementation wraps the exception into WroRuntimeException and throws it further.

Parameters:

e - Exception thrown during processing.

setEncoding

public GoogleClosureCompressorProcessor setEncoding(String encoding)

Parameters:

encoding - the encoding to set

getExterns

protected com.google.javascript.jscomp.SourceFile[] getExterns(Resource resource)

Parameters:

resource - Currently processed resource. The resource can be null, when the closure compiler is used as a post processor.

Returns:

An Array of externs files for the resource to process.

setCompilerOptions

public GoogleClosureCompressorProcessor setCompilerOptions(com.google.javascript.jscomp.CompilerOptions compilerOptions)

Parameters:

compilerOptions - the compilerOptions to set

setCompilationLevel

public GoogleClosureCompressorProcessor setCompilationLevel(com.google.javascript.jscomp.CompilationLevel compilationLevel)

Parameters:

compilationLevel - the compilationLevel to set

newCompilerOptions

protected com.google.javascript.jscomp.CompilerOptions newCompilerOptions()

Returns:

default CompilerOptions object to be used by compressor.

process

public void process(Reader reader,
                    Writer writer)
             throws IOException

Specified by:

process in interface ResourcePostProcessor

Throws:

IOException