org.codehaus.janino

Class SimpleCompiler

java.lang.Object

org.codehaus.commons.compiler.Cookable

org.codehaus.janino.SimpleCompiler

All Implemented Interfaces:

ICookable, ISimpleCompiler

Direct Known Subclasses:

ClassBodyEvaluator

public class SimpleCompiler
extends Cookable
implements ISimpleCompiler

To set up a SimpleCompiler object, proceed as described for ISimpleCompiler. Alternatively, a number of "convenience constructors" exist that execute the described steps instantly.

Field Summary

Fields

Modifier and Type	Field and Description
private ClassLoaderIClassLoader	classLoaderIClassLoader
private static boolean	DEBUG
private boolean	debugLines
private boolean	debugSource
private boolean	debugVars
private ErrorHandler	optionalCompileErrorHandler
private WarningHandler	optionalWarningHandler
private java.lang.ClassLoader	parentClassLoader
private java.lang.ClassLoader	result

Fields inherited from interface org.codehaus.commons.compiler.ICookable

BOOT_CLASS_LOADER, SYSTEM_PROPERTY_SOURCE_DEBUGGING_DIR, SYSTEM_PROPERTY_SOURCE_DEBUGGING_ENABLE

Constructor Summary

Constructors

Constructor and Description
SimpleCompiler()
SimpleCompiler(Scanner scanner, java.lang.ClassLoader optionalParentClassLoader) Equivalent to
SimpleCompiler(java.lang.String fileName) Equivalent to
SimpleCompiler(java.lang.String optionalFileName, java.io.InputStream is) Equivalent to
SimpleCompiler(java.lang.String optionalFileName, java.io.Reader in) Equivalent to

Method Summary

Modifier and Type	Method and Description
protected void	assertNotCooked()
protected Java.Type[]	classesToTypes(Location location, java.lang.Class[] classes) Converts an array of Classes into an array ofJava.Types.
protected Java.Type	classToType(Location location, java.lang.Class clazz) Wraps a reflection Class in a Java.Type object.
protected java.lang.ClassLoader	compileToClassLoader(Java.CompilationUnit compilationUnit) Compile the given compilation unit.
void	cook(Java.CompilationUnit compilationUnit) Cooks this compilation unit directly.
void	cook(Scanner scanner) Scans, parses and ompiles a given compilation unit from the given scanner.
void	cook(java.lang.String optionalFileName, java.io.Reader r) Scans, parses and compiles a given compilation unit from the given Reader.
boolean	equals(java.lang.Object o) Two SimpleCompilers are regarded equal iff Both are objects of the same class (e.g.
java.lang.ClassLoader	getClassLoader() Returns a ClassLoader object through which the previously compiled classes can be accessed.
int	hashCode()
static void	main(java.lang.String[] args)
void	setCompileErrorHandler(ErrorHandler optionalCompileErrorHandler) By default, CompileExceptions are thrown on compile errors, but an application my install its own ErrorHandler.
void	setDebuggingInformation(boolean debugSource, boolean debugLines, boolean debugVars) Determines what kind of debugging information is included in the generates classes.
void	setParentClassLoader(java.lang.ClassLoader optionalParentClassLoader) The "parent class loader" is used to load referenced classes.
void	setWarningHandler(WarningHandler optionalWarningHandler) By default, warnings are discarded, but an application my install a custom WarningHandler.

Methods inherited from class org.codehaus.commons.compiler.Cookable

cook, cook, cook, cook, cook, cook, cook, cookFile, cookFile, cookFile, cookFile, readString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.codehaus.commons.compiler.ICookable

cook, cook, cook, cook, cook, cook, cook, cookFile, cookFile, cookFile, cookFile

Field Detail

DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

parentClassLoader

private java.lang.ClassLoader parentClassLoader

classLoaderIClassLoader

private ClassLoaderIClassLoader classLoaderIClassLoader

result

private java.lang.ClassLoader result

optionalCompileErrorHandler

private ErrorHandler optionalCompileErrorHandler

optionalWarningHandler

private WarningHandler optionalWarningHandler

debugSource

private boolean debugSource

debugLines

private boolean debugLines

debugVars

private boolean debugVars

Constructor Detail

SimpleCompiler

public SimpleCompiler(java.lang.String optionalFileName,
                      java.io.Reader in)
               throws java.io.IOException,
                      CompileException

Equivalent to

 SimpleCompiler sc = new SimpleCompiler();
 sc.cook(optionalFileName, in);

Throws:

java.io.IOException

CompileException

See Also:

SimpleCompiler(), Cookable.cook(String, Reader)

SimpleCompiler

public SimpleCompiler(java.lang.String optionalFileName,
                      java.io.InputStream is)
               throws java.io.IOException,
                      CompileException

Equivalent to

 SimpleCompiler sc = new SimpleCompiler();
 sc.cook(optionalFileName, is);

Throws:

java.io.IOException

CompileException

See Also:

SimpleCompiler(), Cookable.cook(String, InputStream)

SimpleCompiler

public SimpleCompiler(java.lang.String fileName)
               throws java.io.IOException,
                      CompileException

Equivalent to

 SimpleCompiler sc = new SimpleCompiler();
 sc.cook(fileName);

Throws:

java.io.IOException

CompileException

See Also:

SimpleCompiler(), Cookable.cookFile(String)

SimpleCompiler

public SimpleCompiler(Scanner scanner,
                      java.lang.ClassLoader optionalParentClassLoader)
               throws java.io.IOException,
                      CompileException

Equivalent to

 SimpleCompiler sc = new SimpleCompiler();
 sc.setParentClassLoader(optionalParentClassLoader);
 sc.cook(scanner);

Throws:

java.io.IOException

CompileException

See Also:

SimpleCompiler(), setParentClassLoader(ClassLoader), Cookable.cook(Reader)

SimpleCompiler

public SimpleCompiler()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception

setParentClassLoader

public void setParentClassLoader(java.lang.ClassLoader optionalParentClassLoader)

Description copied from interface: ICookable

The "parent class loader" is used to load referenced classes. Useful values are:

System.getSystemClassLoader()	The running JVM's class path
Thread.currentThread().getContextClassLoader() or null	The class loader effective for the invoking thread
ICookable.BOOT_CLASS_LOADER	The running JVM's boot class path

The parent class loader defaults to the current thread's context class loader.

Specified by:

setParentClassLoader in interface ICookable

setDebuggingInformation

public void setDebuggingInformation(boolean debugSource,
                                    boolean debugLines,
                                    boolean debugVars)

Description copied from interface: ICookable

Determines what kind of debugging information is included in the generates classes. The default is typically '-g:none', and '-g:all' if the system property 'org.codehaus.janino.source_debugging.enable' is set to 'true'.

Specified by:

setDebuggingInformation in interface ICookable

cook

public final void cook(java.lang.String optionalFileName,
                       java.io.Reader r)
                throws CompileException,
                       java.io.IOException

Scans, parses and compiles a given compilation unit from the given Reader. After completion, getClassLoader() returns a ClassLoader that allows for access to the compiled classes.

Specified by:

cook in interface ICookable

Specified by:

cook in class Cookable

Parameters:

optionalFileName - Used when reporting errors and warnings.

Throws:

CompileException

java.io.IOException

See Also:

ICookable.cook(String, Reader)

cook

public void cook(Scanner scanner)
          throws CompileException,
                 java.io.IOException

Scans, parses and ompiles a given compilation unit from the given scanner. After completion, getClassLoader() returns a ClassLoader that allows for access to the compiled classes.

Throws:

CompileException

java.io.IOException

cook

public void cook(Java.CompilationUnit compilationUnit)
          throws CompileException

Cooks this compilation unit directly.

Throws:

CompileException

See Also:

Cookable.cook(Reader)

getClassLoader

public java.lang.ClassLoader getClassLoader()

Description copied from interface: ISimpleCompiler

Returns a ClassLoader object through which the previously compiled classes can be accessed. This ClassLoader can be used for subsequent ISimpleCompilers in order to compile compilation units that use types (e.g. declare derived types) declared in the previous one.

This method must only be called after exactly on of the ICookable.cook(String, java.io.Reader) methods was called.

Specified by:

getClassLoader in interface ISimpleCompiler

equals

public boolean equals(java.lang.Object o)

Two SimpleCompilers are regarded equal iff

• Both are objects of the same class (e.g. both are ScriptEvaluators)
• Both generated functionally equal classes as seen by Object.equals(Object)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

setCompileErrorHandler

public void setCompileErrorHandler(ErrorHandler optionalCompileErrorHandler)

Description copied from interface: ICookable

By default, CompileExceptions are thrown on compile errors, but an application my install its own ErrorHandler.

Be aware that a single problem during compilation often causes a bunch of compile errors, so a good ErrorHandler counts errors and throws a CompileException when a limit is reached.

If the given ErrorHandler throws CompileExceptions, then the compilation is terminated and the exception is propagated.

If the given ErrorHandler does not throw CompileExceptions, then the compiler may or may not continue compilation, but must eventually throw a CompileException.

In other words: The ErrorHandler may throw a CompileException or not, but the compiler must definitely throw a CompileException if one or more compile errors have occurred.

Specified by:

setCompileErrorHandler in interface ICookable

Parameters:

optionalCompileErrorHandler - null to restore the default behavior (throwing a CompileException

setWarningHandler

public void setWarningHandler(WarningHandler optionalWarningHandler)

Description copied from interface: ICookable

By default, warnings are discarded, but an application my install a custom WarningHandler.

Specified by:

setWarningHandler in interface ICookable

Parameters:

optionalWarningHandler - null to indicate that no warnings be issued

classToType

protected Java.Type classToType(Location location,
                                java.lang.Class clazz)

Wraps a reflection Class in a Java.Type object.

classesToTypes

protected Java.Type[] classesToTypes(Location location,
                                     java.lang.Class[] classes)

Converts an array of Classes into an array ofJava.Types.

compileToClassLoader

protected final java.lang.ClassLoader compileToClassLoader(Java.CompilationUnit compilationUnit)
                                                    throws CompileException

Compile the given compilation unit. (A "compilation unit" is typically the contents of a Java™ source file.)

Parameters:

compilationUnit - The parsed compilation unit

Returns:

The ClassLoader into which the compiled classes were defined

Throws:

CompileException

assertNotCooked

protected void assertNotCooked()

Throws:

java.lang.IllegalStateException - This Cookable is already cooked