Class SimpleCompiler
- java.lang.Object
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- org.codehaus.commons.compiler.Cookable
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- org.codehaus.janino.SimpleCompiler
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- All Implemented Interfaces:
ICookable
,ISimpleCompiler
public class SimpleCompiler extends Cookable implements ISimpleCompiler
To set up aSimpleCompiler
object, proceed as described forISimpleCompiler
. Alternatively, a number of "convenience constructors" exist that execute the described steps instantly.
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Constructor Summary
Constructors Constructor Description SimpleCompiler()
SimpleCompiler(java.lang.String fileName)
Equivalent toSimpleCompiler(java.lang.String fileName, java.io.InputStream is)
Equivalent toSimpleCompiler(java.lang.String fileName, java.io.Reader in)
Equivalent toSimpleCompiler(Scanner scanner, java.lang.ClassLoader parentClassLoader)
Equivalent to
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Java.Type[]
classesToTypes(Location location, java.lang.Class<?>[] classes)
Converts an array ofClass
es into an array ofJava.Type
s.protected Java.Type
classToType(Location location, java.lang.Class<?> clazz)
Wraps a reflectionClass
in aJava.Type
object.protected java.lang.ClassLoader
compileToClassLoader(Java.AbstractCompilationUnit abstractCompilationUnit)
Compiles the given compilation unit.void
cook(java.lang.String fileName, java.io.Reader r)
Scans, parses and compiles a given compilation unit from the givenReader
.void
cook(Java.AbstractCompilationUnit abstractCompilationUnit)
Cooks this compilation unit directly.void
cook(Scanner scanner)
Scans, parses and compiles a given compilation unit from the given scanner.boolean
equals(java.lang.Object o)
TwoSimpleCompiler
s are regarded equal iff Both are objects of the same class (e.g. both areScriptEvaluator
s) Both generated functionally equal classes as seen byObject.equals(Object)
java.util.Map<java.lang.String,byte[]>
getBytecodes()
ClassFile[]
getClassFiles()
java.lang.ClassLoader
getClassLoader()
Returns aClassLoader
object through which the previously compiled classes can be accessed.int
hashCode()
static void
main(java.lang.String[] args)
protected Java.Type
optionalClassToType(Location location, java.lang.Class<?> clazz)
Wraps a reflectionClass
in aJava.Type
object.java.util.EnumSet<JaninoOption>
options()
SimpleCompiler
options(java.util.EnumSet<JaninoOption> options)
Sets the options for all future compilations.void
setCompileErrorHandler(ErrorHandler compileErrorHandler)
Installs anErrorHandler
which is invoked during compilation on each error.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 parentClassLoader)
The "parent class loader" is used to load referenced classes.void
setSourceVersion(int version)
Controls the language elements that are accepted by theParser
.void
setTargetVersion(int version)
Controls the .class files that are generated by theUnitCompiler
.void
setWarningHandler(WarningHandler warningHandler)
By default, warnings are discarded, but an application my install a customWarningHandler
which is invoked for each warning.-
Methods inherited from class org.codehaus.commons.compiler.Cookable
cook, cook, cook, cook, cook, cook, cook, cookFile, cookFile, cookFile, cookFile
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Constructor Detail
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SimpleCompiler
public SimpleCompiler(@Nullable java.lang.String fileName, java.io.Reader in) throws java.io.IOException, CompileException
Equivalent toSimpleCompiler sc = new SimpleCompiler(); sc.cook(fileName, in);
- Throws:
java.io.IOException
CompileException
- See Also:
SimpleCompiler()
,Cookable.cook(String, Reader)
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SimpleCompiler
public SimpleCompiler(@Nullable java.lang.String fileName, java.io.InputStream is) throws java.io.IOException, CompileException
Equivalent toSimpleCompiler sc = new SimpleCompiler(); sc.cook(fileName, is);
- Throws:
java.io.IOException
CompileException
- See Also:
SimpleCompiler()
,Cookable.cook(String, InputStream)
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SimpleCompiler
public SimpleCompiler(java.lang.String fileName) throws java.io.IOException, CompileException
Equivalent toSimpleCompiler sc = new SimpleCompiler(); sc.cook(fileName);
- Throws:
java.io.IOException
CompileException
- See Also:
SimpleCompiler()
,Cookable.cookFile(String)
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SimpleCompiler
public SimpleCompiler(Scanner scanner, @Nullable java.lang.ClassLoader parentClassLoader) throws java.io.IOException, CompileException
Equivalent toSimpleCompiler sc = new SimpleCompiler(); sc.setParentClassLoader(parentClassLoader); sc.cook(scanner);
- Throws:
java.io.IOException
CompileException
- See Also:
SimpleCompiler()
,setParentClassLoader(ClassLoader)
,Cookable.cook(Reader)
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SimpleCompiler
public SimpleCompiler()
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Method Detail
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main
public static void main(java.lang.String[] args) throws java.lang.Exception
- Throws:
java.lang.Exception
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setParentClassLoader
public void setParentClassLoader(@Nullable java.lang.ClassLoader parentClassLoader)
Description copied from interface:ISimpleCompiler
The "parent class loader" is used to load referenced classes. Useful values are:System.getSystemClassLoader()
The running JVM's class path Thread.currentThread().getContextClassLoader()
ornull
The class loader effective for the invoking thread ClassLoaders.BOOTCLASSPATH_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 interfaceISimpleCompiler
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setDebuggingInformation
public void setDebuggingInformation(boolean debugSource, boolean debugLines, boolean debugVars)
Description copied from interface:ISimpleCompiler
Determines what kind of debugging information is included in the generates classes. The default is typically "-g:none
".- Specified by:
setDebuggingInformation
in interfaceISimpleCompiler
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cook
public final void cook(@Nullable java.lang.String fileName, java.io.Reader r) throws CompileException, java.io.IOException
Scans, parses and compiles a given compilation unit from the givenReader
. After completion,getClassLoader()
returns aClassLoader
that allows for access to the compiled classes.- Specified by:
cook
in interfaceICookable
- Specified by:
cook
in classCookable
- Parameters:
fileName
- Used when reporting errors and warnings- Throws:
CompileException
java.io.IOException
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cook
public void cook(Scanner scanner) throws CompileException, java.io.IOException
Scans, parses and compiles a given compilation unit from the given scanner. After completion,getClassLoader()
returns aClassLoader
that allows for access to the compiled classes.- Throws:
CompileException
java.io.IOException
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cook
public void cook(Java.AbstractCompilationUnit abstractCompilationUnit) throws CompileException
Cooks this compilation unit directly.- Throws:
CompileException
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getClassFiles
public ClassFile[] getClassFiles()
- Returns:
- The
ClassFile
s that were generated during cooking
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setSourceVersion
public void setSourceVersion(int version)
Controls the language elements that are accepted by theParser
.- Specified by:
setSourceVersion
in interfaceICookable
- See Also:
Parser.setSourceVersion(int)
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setTargetVersion
public void setTargetVersion(int version)
Controls the .class files that are generated by theUnitCompiler
.- Specified by:
setTargetVersion
in interfaceICookable
- See Also:
UnitCompiler.setTargetVersion(int)
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getBytecodes
public java.util.Map<java.lang.String,byte[]> getBytecodes()
- Specified by:
getBytecodes
in interfaceICookable
- Returns:
- The generated Java bytecode; maps class name to bytes
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getClassLoader
public java.lang.ClassLoader getClassLoader()
Description copied from interface:ISimpleCompiler
Returns aClassLoader
object through which the previously compiled classes can be accessed. ThisClassLoader
can be used for subsequentISimpleCompiler
s 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 one of the
ICookable.cook(String, java.io.Reader)
methods was called.- Specified by:
getClassLoader
in interfaceISimpleCompiler
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equals
public boolean equals(@Nullable java.lang.Object o)
TwoSimpleCompiler
s are regarded equal iff- Both are objects of the same class (e.g. both are
ScriptEvaluator
s) - Both generated functionally equal classes as seen by
Object.equals(Object)
- Overrides:
equals
in classjava.lang.Object
- Both are objects of the same class (e.g. both are
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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setCompileErrorHandler
public void setCompileErrorHandler(@Nullable ErrorHandler compileErrorHandler)
Description copied from interface:ISimpleCompiler
Installs anErrorHandler
which is invoked during compilation on each error. (By default, the compilation throws aCompileException
on the first error and terminates.)If the given
ErrorHandler
throws aCompileException
, then the compilation terminates and the exception is propagated.If the given
ErrorHandler
does not throw aCompileException
but completes normally, then the compilation may or may not continue, depending on the error. Iff the compilation completes normally but errors were reported, then it will throw aCompileException
indicating the number of errors.In other words: The
ErrorHandler
may throw aCompileException
or not, but the compilation will definitely throw aCompileException
if one or more compile errors have occurred.- Specified by:
setCompileErrorHandler
in interfaceISimpleCompiler
- Parameters:
compileErrorHandler
-null
to restore the default behavior (throwing aCompileException
)
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setWarningHandler
public void setWarningHandler(@Nullable WarningHandler warningHandler)
Description copied from interface:ISimpleCompiler
By default, warnings are discarded, but an application my install a customWarningHandler
which is invoked for each warning. If, for some untypical reason, that warning handler wants to terminate the compilation as quickly as possible, then it would throw aCompileException
.- Specified by:
setWarningHandler
in interfaceISimpleCompiler
- Parameters:
warningHandler
-null
to indicate that no warnings be issued
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options
public java.util.EnumSet<JaninoOption> options()
- Returns:
- A reference to the currently effective compilation options; changes to it take effect immediately
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options
public SimpleCompiler options(java.util.EnumSet<JaninoOption> options)
Sets the options for all future compilations.
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optionalClassToType
@Nullable protected Java.Type optionalClassToType(Location location, @Nullable java.lang.Class<?> clazz)
Wraps a reflectionClass
in aJava.Type
object.
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classToType
protected Java.Type classToType(Location location, java.lang.Class<?> clazz)
Wraps a reflectionClass
in aJava.Type
object.
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classesToTypes
protected Java.Type[] classesToTypes(Location location, @Nullable java.lang.Class<?>[] classes)
Converts an array ofClass
es into an array ofJava.Type
s.
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compileToClassLoader
protected final java.lang.ClassLoader compileToClassLoader(Java.AbstractCompilationUnit abstractCompilationUnit) throws CompileException
Compiles the given compilation unit. (A "compilation unit" is typically the contents of a Java source file.)- Parameters:
abstractCompilationUnit
- The parsed compilation unit- Returns:
- The
ClassLoader
into which the compiled classes were defined - Throws:
CompileException
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