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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.codehaus.commons.compiler.Cookable
org.codehaus.janino.SimpleCompiler
org.codehaus.janino.ClassBodyEvaluator
org.codehaus.janino.ScriptEvaluator
public class ScriptEvaluator
A number of "convenience constructors" exist that execute the setup steps instantly. Their use is discouraged.
Field Summary | |
---|---|
protected java.lang.String[] |
optionalMethodNames
|
protected java.lang.String[][] |
optionalParameterNames
|
protected java.lang.Class[][] |
optionalParameterTypes
|
protected java.lang.Class[] |
optionalReturnTypes
|
protected boolean[] |
optionalStaticMethod
|
protected java.lang.Class[][] |
optionalThrownExceptions
|
Fields inherited from class org.codehaus.janino.ClassBodyEvaluator |
---|
className, ZERO_CLASSES |
Fields inherited from class org.codehaus.janino.SimpleCompiler |
---|
debugLines, debugSource, debugVars |
Fields inherited from interface org.codehaus.commons.compiler.IClassBodyEvaluator |
---|
DEFAULT_CLASS_NAME |
Fields inherited from interface org.codehaus.commons.compiler.ICookable |
---|
BOOT_CLASS_LOADER, SYSTEM_PROPERTY_SOURCE_DEBUGGING_DIR, SYSTEM_PROPERTY_SOURCE_DEBUGGING_ENABLE |
Constructor Summary | |
---|---|
ScriptEvaluator()
|
|
ScriptEvaluator(Scanner scanner,
java.lang.Class optionalExtendedType,
java.lang.Class[] implementedTypes,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions,
java.lang.ClassLoader optionalParentClassLoader)
Equivalent to |
|
ScriptEvaluator(Scanner scanner,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions,
java.lang.ClassLoader optionalParentClassLoader)
Equivalent to |
|
ScriptEvaluator(Scanner scanner,
java.lang.String className,
java.lang.Class optionalExtendedType,
java.lang.Class[] implementedTypes,
boolean staticMethod,
java.lang.Class returnType,
java.lang.String methodName,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions,
java.lang.ClassLoader optionalParentClassLoader)
Equivalent to |
|
ScriptEvaluator(java.lang.String script)
Equivalent to |
|
ScriptEvaluator(java.lang.String script,
java.lang.Class returnType)
Equivalent to |
|
ScriptEvaluator(java.lang.String script,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes)
Equivalent to |
|
ScriptEvaluator(java.lang.String script,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions)
Equivalent to |
|
ScriptEvaluator(java.lang.String optionalFileName,
java.io.InputStream is,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions,
java.lang.ClassLoader optionalParentClassLoader)
Equivalent to |
|
ScriptEvaluator(java.lang.String optionalFileName,
java.io.Reader reader,
java.lang.Class returnType,
java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes,
java.lang.Class[] thrownExceptions,
java.lang.ClassLoader optionalParentClassLoader)
Equivalent to |
Method Summary | |
---|---|
protected void |
compileToMethods(Java.CompilationUnit compilationUnit,
java.lang.String[] methodNames,
java.lang.Class[][] parameterTypes)
|
void |
cook(java.io.Reader[] readers)
Same as ICookable.cook(Reader) , but for multiple scripts. |
void |
cook(Scanner scanner)
|
void |
cook(Scanner[] scanners)
Like cook(Scanner) , but cooks a set of scripts into one class. |
void |
cook(java.lang.String[] strings)
Same as ICookable.cook(String) , but for multiple scripts. |
void |
cook(java.lang.String[] optionalFileNames,
java.io.Reader[] readers)
On a 2 GHz Intel Pentium Core Duo under Windows XP with an IBM 1.4.2 JDK, compiling 10000 expressions "a + b" (integer) takes about 4 seconds and 56 MB of main memory. |
void |
cook(java.lang.String[] optionalFileNames,
java.lang.String[] strings)
Same as ICookable.cook(String, String) , but for multiple scripts. |
java.lang.Object |
createFastEvaluator(java.io.Reader reader,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames)
If the parameter and return types of the expression are known at compile time, then a "fast" script evaluator can be instantiated through this method. |
java.lang.Object |
createFastEvaluator(Scanner scanner,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames)
Notice: This method is not declared in IScriptEvaluator , and is hence only available in this
implementation of org.codehaus.commons.compiler . |
java.lang.Object |
createFastEvaluator(java.lang.String script,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames)
|
static java.lang.Object |
createFastScriptEvaluator(Scanner scanner,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames,
java.lang.ClassLoader optionalParentClassLoader)
Deprecated. |
static java.lang.Object |
createFastScriptEvaluator(Scanner scanner,
java.lang.String[] optionalDefaultImports,
java.lang.String className,
java.lang.Class optionalExtendedClass,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames,
java.lang.ClassLoader optionalParentClassLoader)
Deprecated. |
static java.lang.Object |
createFastScriptEvaluator(Scanner scanner,
java.lang.String className,
java.lang.Class optionalExtendedType,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames,
java.lang.ClassLoader optionalParentClassLoader)
Deprecated. |
static java.lang.Object |
createFastScriptEvaluator(java.lang.String script,
java.lang.Class interfaceToImplement,
java.lang.String[] parameterNames)
Deprecated. |
java.lang.Object |
createInstance(java.io.Reader reader)
Don't use. |
java.lang.Object |
evaluate(int idx,
java.lang.Object[] arguments)
Same as IScriptEvaluator.evaluate(Object[]) , but for multiple scripts. |
java.lang.Object |
evaluate(java.lang.Object[] arguments)
Calls the script with concrete parameter values. |
protected java.lang.Class |
getDefaultReturnType()
|
java.lang.reflect.Method |
getMethod()
Returns the loaded Method . |
java.lang.reflect.Method |
getMethod(int idx)
Same as IScriptEvaluator.getMethod() , but for multiple scripts. |
static java.lang.String[] |
guessParameterNames(Scanner scanner)
Guess the names of the parameters used in the given expression. |
protected Java.MethodDeclarator |
makeMethodDeclaration(Location location,
boolean staticMethod,
java.lang.Class returnType,
java.lang.String methodName,
java.lang.Class[] parameterTypes,
java.lang.String[] parameterNames,
java.lang.Class[] thrownExceptions,
java.util.List statements)
To the given Java.ClassDeclaration , add
A public method declaration with the given return type, name, parameter
names and values and thrown exceptions
A block
|
protected java.util.List |
makeStatements(int idx,
Scanner scanner)
Fill the given block by parsing statements until EOF and adding
them to the block. |
void |
setMethodName(java.lang.String methodName)
Define the name of the generated method. |
void |
setMethodNames(java.lang.String[] methodNames)
Same as IScriptEvaluator.setMethodName(String) , but for multiple scripts. |
void |
setParameters(java.lang.String[][] parameterNames,
java.lang.Class[][] parameterTypes)
Same as IScriptEvaluator.setParameters(String[], Class[]) , but for multiple scripts. |
void |
setParameters(java.lang.String[] parameterNames,
java.lang.Class[] parameterTypes)
Define the names and types of the parameters of the generated method. |
void |
setReturnType(java.lang.Class returnType)
Define the return type of the generated method. |
void |
setReturnTypes(java.lang.Class[] returnTypes)
Same as IScriptEvaluator.setReturnType(Class) , but for multiple scripts. |
void |
setStaticMethod(boolean staticMethod)
Define whether the generated method should be STATIC or not. |
void |
setStaticMethod(boolean[] staticMethod)
Same as IScriptEvaluator.setStaticMethod(boolean) , but for multiple scripts. |
void |
setThrownExceptions(java.lang.Class[] thrownExceptions)
Define the exceptions that the generated method may throw. |
void |
setThrownExceptions(java.lang.Class[][] thrownExceptions)
Same as IScriptEvaluator.setThrownExceptions(Class[]) , but for multiple scripts. |
Methods inherited from class org.codehaus.janino.ClassBodyEvaluator |
---|
addPackageMemberClassDeclaration, compileToClass, createFastClassBodyEvaluator, createFastClassBodyEvaluator, getClazz, makeCompilationUnit, setClassName, setDefaultImports, setExtendedClass, setExtendedType, setImplementedInterfaces, setImplementedTypes |
Methods inherited from class org.codehaus.janino.SimpleCompiler |
---|
assertNotCooked, classesToTypes, classToType, compileToClassLoader, cook, cook, equals, getClassLoader, hashCode, main, setDebuggingInformation, setParentClassLoader, setParentClassLoader, setUpClassLoaders |
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.IClassBodyEvaluator |
---|
getClazz, setClassName, setDefaultImports, setExtendedClass, setExtendedType, setImplementedInterfaces, setImplementedTypes |
Methods inherited from interface org.codehaus.commons.compiler.ICookable |
---|
cook, cook, cook, cook, cook, cook, cook, cook, cookFile, cookFile, cookFile, cookFile, setDebuggingInformation, setParentClassLoader |
Field Detail |
---|
protected boolean[] optionalStaticMethod
protected java.lang.Class[] optionalReturnTypes
protected java.lang.String[] optionalMethodNames
protected java.lang.String[][] optionalParameterNames
protected java.lang.Class[][] optionalParameterTypes
protected java.lang.Class[][] optionalThrownExceptions
Constructor Detail |
---|
public ScriptEvaluator(java.lang.String script) throws CompileException
ScriptEvaluator se = new ScriptEvaluator(); se.cook(script);
CompileException
ScriptEvaluator()
,
Cookable.cook(String)
public ScriptEvaluator(java.lang.String script, java.lang.Class returnType) throws CompileException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.cook(script);
CompileException
ScriptEvaluator()
,
setReturnType(Class)
,
Cookable.cook(String)
public ScriptEvaluator(java.lang.String script, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes) throws CompileException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.cook(script);
CompileException
ScriptEvaluator()
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
Cookable.cook(String)
public ScriptEvaluator(java.lang.String script, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions) throws CompileException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.cook(script);
CompileException
ScriptEvaluator()
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
Cookable.cook(String)
public ScriptEvaluator(java.lang.String optionalFileName, java.io.InputStream is, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.setParentClassLoader(optionalParentClassLoader); se.cook(optionalFileName, is);
CompileException
java.io.IOException
ScriptEvaluator()
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
SimpleCompiler.setParentClassLoader(ClassLoader)
,
Cookable.cook(String, InputStream)
public ScriptEvaluator(java.lang.String optionalFileName, java.io.Reader reader, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.setParentClassLoader(optionalParentClassLoader); se.cook(reader);
CompileException
java.io.IOException
ScriptEvaluator()
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
SimpleCompiler.setParentClassLoader(ClassLoader)
,
Cookable.cook(String, Reader)
public ScriptEvaluator(Scanner scanner, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
ScriptEvaluator se = new ScriptEvaluator(); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.setParentClassLoader(optionalParentClassLoader); se.cook(scanner);
CompileException
java.io.IOException
ScriptEvaluator()
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
SimpleCompiler.setParentClassLoader(ClassLoader)
,
Cookable.cook(Reader)
public ScriptEvaluator(Scanner scanner, java.lang.Class optionalExtendedType, java.lang.Class[] implementedTypes, java.lang.Class returnType, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
ScriptEvaluator se = new ScriptEvaluator(); se.setExtendedType(optionalExtendedType); se.setImplementedTypes(implementedTypes); se.setReturnType(returnType); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.setParentClassLoader(optionalParentClassLoader); se.cook(scanner);
CompileException
java.io.IOException
ScriptEvaluator()
,
ClassBodyEvaluator.setExtendedClass(Class)
,
ClassBodyEvaluator.setImplementedInterfaces(Class[])
,
setReturnType(Class)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
SimpleCompiler.setParentClassLoader(ClassLoader)
,
Cookable.cook(Reader)
public ScriptEvaluator(Scanner scanner, java.lang.String className, java.lang.Class optionalExtendedType, java.lang.Class[] implementedTypes, boolean staticMethod, java.lang.Class returnType, java.lang.String methodName, java.lang.String[] parameterNames, java.lang.Class[] parameterTypes, java.lang.Class[] thrownExceptions, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
ScriptEvaluator se = new ScriptEvaluator(); se.setClassName(className); se.setExtendedType(optionalExtendedType); se.setImplementedTypes(implementedTypes); se.setStaticMethod(staticMethod); se.setReturnType(returnType); se.setMethodName(methodName); se.setParameters(parameterNames, parameterTypes); se.setThrownExceptions(thrownExceptions); se.setParentClassLoader(optionalParentClassLoader); se.cook(scanner);
CompileException
java.io.IOException
ScriptEvaluator()
,
ClassBodyEvaluator.setClassName(String)
,
ClassBodyEvaluator.setExtendedClass(Class)
,
ClassBodyEvaluator.setImplementedInterfaces(Class[])
,
setStaticMethod(boolean)
,
setReturnType(Class)
,
setMethodName(String)
,
setParameters(String[], Class[])
,
setThrownExceptions(Class[])
,
SimpleCompiler.setParentClassLoader(ClassLoader)
,
Cookable.cook(Reader)
public ScriptEvaluator()
Method Detail |
---|
public void setStaticMethod(boolean staticMethod)
IScriptEvaluator
true
.
setStaticMethod
in interface IScriptEvaluator
public void setReturnType(java.lang.Class returnType)
IScriptEvaluator
void.class
.
setReturnType
in interface IScriptEvaluator
public void setMethodName(java.lang.String methodName)
IScriptEvaluator
setMethodName
in interface IScriptEvaluator
public void setParameters(java.lang.String[] parameterNames, java.lang.Class[] parameterTypes)
IScriptEvaluator
names
and types
must have the same number of elements.
The parameters can be of primitive type, e.g. double.class
.
setParameters
in interface IScriptEvaluator
public void setThrownExceptions(java.lang.Class[] thrownExceptions)
IScriptEvaluator
setThrownExceptions
in interface IScriptEvaluator
public final void cook(Scanner scanner) throws CompileException, java.io.IOException
cook
in class ClassBodyEvaluator
CompileException
java.io.IOException
public java.lang.Object evaluate(java.lang.Object[] arguments) throws java.lang.reflect.InvocationTargetException
IScriptEvaluator
Each argument must have the same type as specified through the parameterTypes
parameter of IScriptEvaluator.setParameters(String[], Class[])
.
Arguments of primitive type must passed with their wrapper class objects.
The object returned has the class as specified through IScriptEvaluator.setReturnType(Class)
.
This method is thread-safe.
evaluate
in interface IScriptEvaluator
arguments
- The actual parameter values
java.lang.reflect.InvocationTargetException
public java.lang.reflect.Method getMethod()
IScriptEvaluator
Method
.
This method must only be called after exactly one of the ICookable.cook(String, Reader)
methods was called.
getMethod
in interface IScriptEvaluator
public void setStaticMethod(boolean[] staticMethod)
IScriptEvaluator
IScriptEvaluator.setStaticMethod(boolean)
, but for multiple scripts.
setStaticMethod
in interface IScriptEvaluator
public void setReturnTypes(java.lang.Class[] returnTypes)
IScriptEvaluator
IScriptEvaluator.setReturnType(Class)
, but for multiple scripts.
setReturnTypes
in interface IScriptEvaluator
public void setMethodNames(java.lang.String[] methodNames)
IScriptEvaluator
IScriptEvaluator.setMethodName(String)
, but for multiple scripts.
Define the names of the generated methods. By default the methods have distinct and implementation-specific names.
If two scripts have the same name, then they must have different parameter types
(see IScriptEvaluator.setParameters(String[][], Class[][])
).
setMethodNames
in interface IScriptEvaluator
public void setParameters(java.lang.String[][] parameterNames, java.lang.Class[][] parameterTypes)
IScriptEvaluator
IScriptEvaluator.setParameters(String[], Class[])
, but for multiple scripts.
setParameters
in interface IScriptEvaluator
public void setThrownExceptions(java.lang.Class[][] thrownExceptions)
IScriptEvaluator
IScriptEvaluator.setThrownExceptions(Class[])
, but for multiple scripts.
setThrownExceptions
in interface IScriptEvaluator
public final void cook(Scanner[] scanners) throws CompileException, java.io.IOException
cook(Scanner)
, but cooks a set of scripts into one class. Notice that
if any of the scripts causes trouble, the entire compilation will fail. If you
need to report which of the scripts causes the exception, you may want to use the
optionalFileName
argument of Scanner.Scanner(String, Reader)
to
distinguish between the individual token sources.
On a 2 GHz Intel Pentium Core Duo under Windows XP with an IBM 1.4.2 JDK, compiling 10000 expressions "a + b" (integer) takes about 4 seconds and 56 MB of main memory. The generated class file is 639203 bytes large.
The number and the complexity of the scripts is restricted by the Limitations of the Java Virtual Machine, where the most limiting factor is the 64K entries limit of the constant pool. Since every method with a distinct name requires one entry there, you can define at best 32K (very simple) scripts. If and only if the number of scanners is one, then that single script may contain leading IMPORT directives.
java.lang.IllegalStateException
- Any of the preceeding set...()
had an array size different from that
of scanners
CompileException
java.io.IOException
public final void cook(java.io.Reader[] readers) throws CompileException, java.io.IOException
IScriptEvaluator
ICookable.cook(Reader)
, but for multiple scripts.
cook
in interface IScriptEvaluator
CompileException
java.io.IOException
public final void cook(java.lang.String[] optionalFileNames, java.io.Reader[] readers) throws CompileException, java.io.IOException
The number and the complexity of the scripts is restricted by the Limitations of the Java Virtual Machine, where the most limiting factor is the 64K entries limit of the constant pool. Since every method with a distinct name requires one entry there, you can define at best 32K (very simple) scripts.
cook
in interface IScriptEvaluator
CompileException
java.io.IOException
public final void cook(java.lang.String[] strings) throws CompileException
IScriptEvaluator
ICookable.cook(String)
, but for multiple scripts.
cook
in interface IScriptEvaluator
CompileException
public final void cook(java.lang.String[] optionalFileNames, java.lang.String[] strings) throws CompileException
IScriptEvaluator
ICookable.cook(String, String)
, but for multiple scripts.
cook
in interface IScriptEvaluator
CompileException
protected java.lang.Class getDefaultReturnType()
protected java.util.List makeStatements(int idx, Scanner scanner) throws CompileException, java.io.IOException
block
by parsing statements until EOF and adding
them to the block.
CompileException
java.io.IOException
protected void compileToMethods(Java.CompilationUnit compilationUnit, java.lang.String[] methodNames, java.lang.Class[][] parameterTypes) throws CompileException
CompileException
protected Java.MethodDeclarator makeMethodDeclaration(Location location, boolean staticMethod, java.lang.Class returnType, java.lang.String methodName, java.lang.Class[] parameterTypes, java.lang.String[] parameterNames, java.lang.Class[] thrownExceptions, java.util.List statements)
Java.ClassDeclaration
, add
returnType
- Return type of the declared methodpublic static java.lang.Object createFastScriptEvaluator(java.lang.String script, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames) throws CompileException
CompileException
createFastScriptEvaluator(Scanner, String[], String, Class, Class, String[], ClassLoader)
public static java.lang.Object createFastScriptEvaluator(Scanner scanner, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
CompileException
java.io.IOException
createFastScriptEvaluator(Scanner, String[], String, Class, Class, String[], ClassLoader)
public static java.lang.Object createFastScriptEvaluator(Scanner scanner, java.lang.String className, java.lang.Class optionalExtendedType, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
CompileException
java.io.IOException
createFastScriptEvaluator(Scanner, String[], String, Class, Class, String[], ClassLoader)
public static java.lang.Object createFastScriptEvaluator(Scanner scanner, java.lang.String[] optionalDefaultImports, java.lang.String className, java.lang.Class optionalExtendedClass, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames, java.lang.ClassLoader optionalParentClassLoader) throws CompileException, java.io.IOException
createFastEvaluator(Scanner,Class,String[])
instead:
ScriptEvaluator
se = newScriptEvaluator
(); se.setDefaultImports
.(optionalDefaultImports); se.setClassName
.(className); se.setExtendedClass
.(optionalExtendedClass); se.setParentClassLoader
(optionalParentClassLoader); return se.createFastEvaluator
(scanner, interfaceToImplement, parameterNames);
CompileException
java.io.IOException
public final java.lang.Object createInstance(java.io.Reader reader)
createInstance
in interface IClassBodyEvaluator
createInstance
in class ClassBodyEvaluator
reader
- Source of class body tokens
optionalExtendedType
and implements the given
implementedTypes
public java.lang.Object createFastEvaluator(java.io.Reader reader, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames) throws CompileException, java.io.IOException
IScriptEvaluator
Script evaluation is faster than through IScriptEvaluator.evaluate(Object[])
, because it is not done
through reflection but through direct method invocation.
Example:
public interface Foo { int bar(int a, int b); } ... IScriptEvaluator se =All other configuration (implemented type, static method, return type, method name, parameter names and types, thrown exceptions) are predetermined by theCompilerFactoryFactory
.getDefaultCompilerFactory
().newScriptEvaluator
(); // Optionally configure the SE her: se.setClassName
("Bar"); se.setDefaultImports
(new String[] { "java.util.*" }); se.setExtendedClass
(SomeOtherClass.class); se.setParentClassLoader
(someClassLoader); Foo f = (Foo) se.createFastScriptEvaluator
( "return a - b;", Foo.class, new String[] { "a", "b" } ); System.out.println("1 - 2 = " + f.bar(1, 2));
interfaceToImplement
.
Notice: The interfaceToImplement
must either be declared public
,
or with package scope in the same package as the generated class (see IClassBodyEvaluator.setClassName(String)
).
createFastEvaluator
in interface IScriptEvaluator
reader
- Produces the stream of script tokensinterfaceToImplement
- Must declare exactly one methodparameterNames
- The names of the parameters of that method
CompileException
java.io.IOException
public java.lang.Object createFastEvaluator(java.lang.String script, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames) throws CompileException
createFastEvaluator
in interface IScriptEvaluator
script
- Contains the sequence of script tokens
CompileException
IScriptEvaluator.createFastEvaluator(Reader, Class, String[])
public java.lang.Object createFastEvaluator(Scanner scanner, java.lang.Class interfaceToImplement, java.lang.String[] parameterNames) throws CompileException, java.io.IOException
IScriptEvaluator
, and is hence only available in this
implementation of org.codehaus.commons.compiler
. To be independent from this particular
implementation, try to switch to createFastEvaluator(Reader, Class, String[])
.
scanner
- Source of tokens to read
CompileException
java.io.IOException
createFastEvaluator(Reader, Class, String[])
public static java.lang.String[] guessParameterNames(Scanner scanner) throws CompileException, java.io.IOException
CompileException
java.io.IOException
Scanner.Scanner(String, Reader)
public java.lang.Object evaluate(int idx, java.lang.Object[] arguments) throws java.lang.reflect.InvocationTargetException
IScriptEvaluator
IScriptEvaluator.evaluate(Object[])
, but for multiple scripts.
evaluate
in interface IScriptEvaluator
java.lang.reflect.InvocationTargetException
public java.lang.reflect.Method getMethod(int idx)
IScriptEvaluator
IScriptEvaluator.getMethod()
, but for multiple scripts.
getMethod
in interface IScriptEvaluator
|
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