master
Abhinav Sarkar 2009-10-22 22:51:58 +05:30
revize b343d9c8da
17 změnil soubory, kde provedl 1032 přidání a 0 odebrání

7
.classpath Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src/main/java"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="var" path="JYTHON_HOME/jython.jar" sourcepath="/JYTHON_HOME/Doc/javadoc"/>
<classpathentry kind="output" path="bin"/>
</classpath>

17
.project Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>jywrapper</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

0
README Normal file
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package net.abhinavsarkar.jywrapper;
import static net.abhinavsarkar.jywrapper.Messages._;
import net.abhinavsarkar.jywrapper.annotation.Wraps;
import net.abhinavsarkar.jywrapper.exception.PythonImportNotFoundException;
import org.python.core.PyFunction;
import org.python.core.PyModule;
import org.python.core.PyObject;
import org.python.core.PyType;
/**
* @author Abhinav Sarkar <abhinav@abhinavsarkar.net>
*
* @param <T> The type of the java class to wrap the Python class/module with.
*/
public final class JyWrapper {
private JyWrapper() {
}
public static <T> T wrap(final Class<T> javaClass) {
final Wraps annotation = javaClass.getAnnotation(Wraps.class);
if (annotation == null) {
throw new PythonImportNotFoundException(_("JyWrapper.7", javaClass)); //$NON-NLS-1$
}
return wrap(javaClass, annotation.value());
}
/**
* @param pyImportName The full import name of the Python class/module
* to wrap.
* @return An instance of {@link UninitedPyObjectWrapper}, ready to be
* initialized.
* @throws IllegalStateException Thrown if the java Class to be used to
* wrap the Python module/class, has not been supplied by earlier
* calling {@link JyWrapper#with(Class)}.
* @throws IllegalArgumentException Thrown if the pyImportName parameter
* is null.
*/
public static <T> T wrap(final Class<T> javaClass, final String pyImportName) {
if (javaClass == null) {
throw new IllegalStateException(_("JyWrapper.6", "javaClass")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (pyImportName == null) {
throw new IllegalArgumentException(_("JyWrapper.6", "pyImportName")); //$NON-NLS-1$ //$NON-NLS-2$
}
final PyObject pyImport = PyImportLoader.loadPyImport(pyImportName);
if (!(pyImport instanceof PyType || pyImport instanceof PyModule)) {
throw new IllegalArgumentException(_("JyWrapper.5", pyImportName)); //$NON-NLS-1$
}
return Util.py2Java(pyImport, javaClass);
}
/**
* @param <T> The return type of the {@link PyCallable} instance.
* @param pyImportName The full import name of the Python function to wrap.
* @param returnType The class of the return type.
* @return An instance of {@link PyCallable} which wraps the
* Python function given in parameter.
* @throws IllegalArgumentException Thrown if the any of the parameters
* supplied are null or if the pyImportName parameter supplied does not
* correspond to a Python function.
*/
public static <T> PyCallable<T> wrapPyFunction(
final String pyImportName, final Class<T> returnType) {
if (pyImportName == null) {
throw new IllegalArgumentException(_("JyWrapper.6", "pyImportName")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (returnType == null) {
throw new IllegalArgumentException(_("JyWrapper.6", "returnType")); //$NON-NLS-1$ //$NON-NLS-2$
}
final PyObject pyImport = PyImportLoader.loadPyImport(pyImportName);
if (!(pyImport instanceof PyFunction)) {
throw new IllegalArgumentException(_("JyWrapper.0", pyImportName)); //$NON-NLS-1$
}
@SuppressWarnings("unchecked")
final PyCallable<T> newInstance = PyObjectProxy.newInstance(
pyImport, PyCallable.class);
return newInstance;
}
}

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package net.abhinavsarkar.jywrapper;
import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
final class Messages {
private static final String BUNDLE_NAME = "net.abhinavsarkar.jywrapper.messages"; //$NON-NLS-1$
private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle
.getBundle(BUNDLE_NAME);
private Messages() {
}
public static String getString(String key) {
try {
return RESOURCE_BUNDLE.getString(key);
} catch (MissingResourceException e) {
return '!' + key + '!';
}
}
public static String _(final String messageKey, final Object... arguments) {
return new MessageFormat(getString(messageKey))
.format(arguments, new StringBuffer(), null).toString();
}
}

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package net.abhinavsarkar.jywrapper;
import net.abhinavsarkar.jywrapper.PyObjectProxy.MemberType;
public enum PyAttributeType {
GETTER(MemberType.GETTER), SETTER(MemberType.SETTER), CONST(MemberType.CONST);
private final MemberType memberType;
private PyAttributeType(MemberType memberType) {
this.memberType = memberType;
}
public MemberType getMemberType() {
return memberType;
}
}

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package net.abhinavsarkar.jywrapper;
/**
* @author AbhinavSarkar
*
* @param <T>
*/
public interface PyCallable<T> {
/**
* @param args
* @return
*/
public abstract T call(Object... args);
}

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package net.abhinavsarkar.jywrapper;
import static net.abhinavsarkar.jywrapper.Messages._;
import java.util.concurrent.ConcurrentHashMap;
import net.abhinavsarkar.jywrapper.exception.PythonImportNotFoundException;
import org.python.core.Py;
import org.python.core.PyException;
import org.python.core.PyObject;
import org.python.core.PySystemState;
/**
* @author AbhinavSarkar
*
*/
public final class PyImportLoader {
private static final PyObject importer = new PySystemState().getBuiltins()
.__getitem__(Py.newString("__import__")); //$NON-NLS-1$
private static final ConcurrentHashMap<String, PyObject> loadedPyImports =
new ConcurrentHashMap<String, PyObject>();
private PyImportLoader() {
}
/**
* @param fullImportName
* @return
* @throws PythonImportNotFoundException
*/
public static PyObject loadPyImport(String fullImportName)
throws PythonImportNotFoundException {
if (!loadedPyImports.containsKey(fullImportName)) {
int i = fullImportName.lastIndexOf('.');
String errorMsg = _("PyImportLoader.1", fullImportName); //$NON-NLS-1$
PyObject pyImport;
if (i == -1) {
String pyModuleName = fullImportName;
try {
pyImport = importer.__call__(Py.newString(pyModuleName));
} catch (PyException pye) {
throw new PythonImportNotFoundException(errorMsg, pye);
}
} else {
String pyModuleName = fullImportName.substring(0, i);
String pyClassName = fullImportName.substring(i + 1);
try {
pyImport = importer.__call__(Py.newString(pyModuleName))
.__getattr__(pyClassName);
} catch (PyException pye) {
throw new PythonImportNotFoundException(errorMsg, pye);
}
}
loadedPyImports.putIfAbsent(fullImportName, pyImport);
}
return loadedPyImports.get(fullImportName);
}
}

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package net.abhinavsarkar.jywrapper;
import net.abhinavsarkar.jywrapper.PyObjectProxy.MemberType;
public enum PyMethodType {
INIT(MemberType.INIT),
DIRECT(MemberType.DIRECT),
UNDERSCORED(MemberType.UNDERSCORED),
NUMERIC(MemberType.NUMERIC);
private final MemberType memberType;
private PyMethodType(MemberType memberType) {
this.memberType = memberType;
}
public MemberType getMemberType() {
return memberType;
}
}

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/**
*
*/
package net.abhinavsarkar.jywrapper;
import static net.abhinavsarkar.jywrapper.Messages._;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.concurrent.ConcurrentHashMap;
import net.abhinavsarkar.jywrapper.annotation.PyAttribute;
import net.abhinavsarkar.jywrapper.annotation.PyMethod;
import net.abhinavsarkar.jywrapper.exception.PythonImportInstantiationError;
import org.python.core.Py;
import org.python.core.PyException;
import org.python.core.PyFunction;
import org.python.core.PyModule;
import org.python.core.PyObject;
import org.python.core.PyProperty;
import org.python.core.PyProxy;
import org.python.core.PyType;
final class PyObjectProxy implements InvocationHandler {
private static final String JAVA_COMPARE_METHOD_NAME = "compareTo"; //$NON-NLS-1$
private static final String GETTER_METHOD_PREFIX = "get"; //$NON-NLS-1$
private static final String SETTER_METHOD_PREFIX = "set"; //$NON-NLS-1$
private static final String CONST_METHOD_PREFIX = "const"; //$NON-NLS-1$
private static enum JavaSpecialMethod {
equals("__eq__"), hashCode("__hash__"), toString("__str__"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
private final String pyEquiv;
private JavaSpecialMethod(final String pyEquiv) {
this.pyEquiv = pyEquiv;
}
public static Object invoke(final PyObject pyObject, final Method method,
final Object[] args) throws NoSuchMethodException {
try {
return invokePyMethod(pyObject, method.getReturnType(),
JavaSpecialMethod.valueOf(method.getName()).pyEquiv, args);
} catch (final IllegalArgumentException ex) {
throw new NoSuchMethodException();
}
}
}
private static enum NumericMethod {
add ("__add__"), //$NON-NLS-1$
subtract ("__sub__"), //$NON-NLS-1$
multiply ("__mul__"), //$NON-NLS-1$
divide ("__div__"), //$NON-NLS-1$
divideAndRemainder ("__divmod__"), //$NON-NLS-1$
remainder ("__mod__"), //$NON-NLS-1$
pow ("__pow__"), //$NON-NLS-1$
negate ("__neg__"), //$NON-NLS-1$
plus ("__pos__"), //$NON-NLS-1$
abs ("__abs__"), //$NON-NLS-1$
and ("__and__"), //$NON-NLS-1$
or ("__or__"), //$NON-NLS-1$
xor ("__xor__"), //$NON-NLS-1$
invert ("__invert__"), //$NON-NLS-1$
intValue ("__int__"), //$NON-NLS-1$
longValue ("__long__"), //$NON-NLS-1$
floatValue ("__float__"); //$NON-NLS-1$
private final String pyEquiv;
private NumericMethod(final String pyEquiv) {
this.pyEquiv = pyEquiv;
}
public static Object invoke(final PyObject pyObject, final Method method,
final Object[] args) throws NoSuchMethodException {
try {
return findAndInvokePyMethod(pyObject,
method.getReturnType(),
NumericMethod.valueOf(method.getName()).pyEquiv, args);
} catch (final IllegalArgumentException ex) {
throw new NoSuchMethodException();
}
}
}
private static enum PyProxyInterfaceMethod {
_setPyInstance, _setPySystemState, __initProxy__, _getPySystemState,
_getPyInstance {
@Override
public Object invoke(final PyObject pyObject) {
return new Throwable().getStackTrace()[4].getClassName()
.startsWith("org.python") ? pyObject : null;
}
};
public Object invoke(final PyObject pyObject) {
return Void.TYPE;
}
}
static enum MemberType {
INIT {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
final PyMethod annotation = method.getAnnotation(PyMethod.class);
if (annotation != null
&& annotation.type() == PyMethodType.INIT) {
synchronized (pyObject) {
return initialize(pyObject, pyImportName, javaClass, args);
}
}
throw new NoSuchMethodException(
_("JyWrapper.15", "initialization method", //$NON-NLS-1$ //$NON-NLS-2$
method.getName(), pyImportName));
}
},
CALL {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
if (javaClass.equals(PyCallable.class)
&& pyObject instanceof PyFunction
&& "call".equals(method.getName())) { //$NON-NLS-1$
return invokePyMethod(pyObject, method.getReturnType(),
"__call__", (Object[]) args[0]); //$NON-NLS-1$
}
throw new NoSuchMethodException();
}
},
DIRECT {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
String methodName = method.getName();
final PyMethod annotation = method.getAnnotation(PyMethod.class);
if (annotation != null
&& annotation.type() == PyMethodType.DIRECT) {
final String name = annotation.method();
if (!"".equals(name)) { //$NON-NLS-1$
methodName = name;
}
}
try {
return findAndInvokePyMethod(pyObject,
method.getReturnType(), methodName, args);
} catch (final NoSuchMethodException e) {
throw new NoSuchMethodException(
_("JyWrapper.15", "direct method", //$NON-NLS-1$ //$NON-NLS-2$
methodName, pyImportName));
}
}
},
UNDERSCORED {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
try {
return findAndInvokePyMethod(pyObject,
method.getReturnType(),
Util.camelCase2UnderScore(method.getName()), args);
} catch (final NoSuchMethodException e) {
throw new NoSuchMethodException(
_("JyWrapper.15", "underscored method", //$NON-NLS-1$ //$NON-NLS-2$
method.getName(), pyImportName));
}
}
},
COMPARE {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
for (final RichComparisonOperator compOp : RichComparisonOperator.values()) {
try {
if ((Boolean) findAndInvokePyMethod(pyObject,
Boolean.class, compOp.name(), args)) {
return compOp.returnValue();
}
} catch (final PyException e) {
if (e.type.equals(Py.NotImplementedError)) {
// the comparison operator is not implemented. move on.
continue;
}
throw e;
}
}
try {
return (Integer) findAndInvokePyMethod(
pyObject, Integer.class, "__cmp__", args); //$NON-NLS-1$
} catch (final PyException e) {
if (!e.type.equals(Py.NotImplementedError)) {
throw e;
}
}
throw new NoSuchMethodException(_("JyWrapper.11")); //$NON-NLS-1$
}
},
SPECIAL {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
return JavaSpecialMethod.invoke(pyObject, method, args);
}
},
PYPROXY_INTERFACE {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
try {
return PyProxyInterfaceMethod.valueOf(method.getName())
.invoke(pyObject);
} catch (final IllegalArgumentException ex) {
throw new NoSuchMethodException();
}
}
},
GETTER {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
final PyAttribute annotation = method.getAnnotation(PyAttribute.class);
final String methodName = method.getName();
PyObject attrValue = null;
String attrName = methodName;
if (annotation != null
&& annotation.type() == PyAttributeType.GETTER) {
attrName = annotation.attribute();
if (!"".equals(attrName)) { //$NON-NLS-1$
synchronized (pyObject) {
attrValue = pyObject.__findattr__(attrName);
}
}
}
if (attrValue == null && methodName.startsWith(GETTER_METHOD_PREFIX)) {
attrName = Util.camelCase2UnderScore(methodName)
.substring(GETTER_METHOD_PREFIX.length() + 1);
synchronized (pyObject) {
attrValue = pyObject.__findattr__(attrName);
}
}
if (attrValue != null) {
if (PyProperty.class.isAssignableFrom(attrValue.getClass())) {
throw new IllegalArgumentException(_("JyWrapper.12", attrName)); //$NON-NLS-1$
}
return Util.py2Java(attrValue, method.getReturnType());
}
throw new NoSuchMethodException(
_("JyWrapper.15", "instance attribute", //$NON-NLS-1$ //$NON-NLS-2$
methodName, pyImportName));
}
},
SETTER {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException, IllegalAccessException {
final String methodName = method.getName();
final PyAttribute annotation = method.getAnnotation(PyAttribute.class);
String attrName = null;
if (annotation != null
&& annotation.type() == PyAttributeType.SETTER) {
attrName = annotation.attribute();
if ("".equals(attrName)) { //$NON-NLS-1$
attrName = null;
}
}
if (attrName == null
&& methodName.startsWith(SETTER_METHOD_PREFIX)
&& args.length == 1) {
attrName = Util.camelCase2UnderScore(methodName).substring(
SETTER_METHOD_PREFIX.length() + 1);
}
if (attrName != null) {
PyObject attrValue;
synchronized (pyObject) {
attrValue = pyObject.__findattr__(attrName);
}
if (attrValue != null) {
if (PyProperty.class.isAssignableFrom(attrValue.getClass())) {
throw new IllegalArgumentException(
_("JyWrapper.14", attrName)); //$NON-NLS-1$
}
}
try {
final PyObject pyArgs = Py.java2py(args[0]);
synchronized (pyObject) {
pyObject.__setattr__(attrName, pyArgs);
}
return Void.TYPE;
} catch (final PyException e) {
if (e.type.equals(Py.AttributeError)
&& e.value.toString().equals(
"can't set attribute")) { //$NON-NLS-1$
throw new IllegalAccessException(
_("JyWrapper.13", attrName)); //$NON-NLS-1$
}
throw e;
}
}
throw new NoSuchMethodException(
_("JyWrapper.15", "instance attribute", //$NON-NLS-1$ //$NON-NLS-2$
methodName, pyImportName));
}
},
CONST {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
final PyAttribute annotation = method.getAnnotation(PyAttribute.class);
final String methodName = method.getName();
PyObject attrValue = null;
if (annotation != null
&& annotation.type() == PyAttributeType.CONST) {
final String attrName = annotation.attribute();
if (!"".equals(attrName)) { //$NON-NLS-1$
synchronized (pyObject) {
attrValue = pyObject.__findattr__(attrName);
}
} else {
synchronized (pyObject) {
attrValue = pyObject.__findattr__(methodName);
}
}
}
if (attrValue == null
&& methodName.startsWith(CONST_METHOD_PREFIX)) {
final String attrName = methodName
.substring(CONST_METHOD_PREFIX.length());
synchronized (pyObject) {
attrValue = pyObject.__findattr__(attrName);
}
}
if (attrValue != null) {
return Util.py2Java(attrValue, method.getReturnType());
}
throw new NoSuchMethodException(
_("JyWrapper.15", "constant", //$NON-NLS-1$ //$NON-NLS-2$
methodName, pyImportName));
}
},
NUMERIC {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
try {
return NumericMethod.invoke(pyObject, method, args);
} catch (final NoSuchMethodException e) {
throw new NoSuchMethodException(
_("JyWrapper.15", "eqivalent numeric method", //$NON-NLS-1$ //$NON-NLS-2$
method.getName(), pyImportName));
}
}
},
NO_SUCH_METHOD {
@Override
public Object invoke(final PyObject pyObject, final Class<?> javaClass,
final Method method, final Object[] args, final String pyImportName)
throws NoSuchMethodException {
throw new NoSuchMethodException(
_("JyWrapper.15", "method", method.getName(), pyImportName)); //$NON-NLS-1$ //$NON-NLS-2$
}
};
public abstract Object invoke(PyObject pyObject, Class<?> javaClass,
Method method, Object[] args, String pyImportName)
throws NoSuchMethodException, IllegalAccessException;
}
private static enum RichComparisonOperator {
__eq__(0), __lt__(-1), __gt__(1);
private int returnValue;
public int returnValue() { return returnValue; }
private RichComparisonOperator(final int returnValue) {
this.returnValue = returnValue;
}
}
private final PyObject pyObject;
private final Class<?> javaClass;
private final String pyImportName;
private static final ConcurrentHashMap<Method, MemberType> METHOD_JUMP_TABLE =
new ConcurrentHashMap<Method, MemberType>();
private PyObjectProxy(final PyObject pyObject, final Class<?> javaClass) {
this.pyObject = pyObject;
this.javaClass = javaClass;
this.pyImportName = Util.getPyImportName(this.pyObject);
}
public static <T> T newInstance(final PyObject pyObject,
final Class<T> javaClass) {
if (javaClass.isInterface()) {
ClassLoader classLoader = javaClass.getClassLoader();
if (classLoader == null) {
classLoader = ClassLoader.getSystemClassLoader();
}
@SuppressWarnings("unchecked")
final T newProxyInstance = (T) Proxy.newProxyInstance(
classLoader,
new Class[] { javaClass, PyProxy.class },
new PyObjectProxy(pyObject, javaClass));
return newProxyInstance;
} else {
throw new IllegalArgumentException(_("JyWrapper.8", javaClass.getName())); //$NON-NLS-1$
}
}
public Object invoke(final Object proxy, final Method method, final Object[] args)
throws NoSuchMethodException, IllegalAccessException {
final PyMethod pyMethodAnnotation = method.getAnnotation(PyMethod.class);
if (pyMethodAnnotation != null) {
return pyMethodAnnotation.type().getMemberType()
.invoke(pyObject, javaClass, method, args, pyImportName);
}
final PyAttribute pyAttributeAnnotation = method.getAnnotation(PyAttribute.class);
if (pyAttributeAnnotation != null) {
return pyAttributeAnnotation.type().getMemberType()
.invoke(pyObject, javaClass, method, args, pyImportName);
}
final String methodName = method.getName();
if (!METHOD_JUMP_TABLE.containsKey(method)) {
if (Comparable.class.isAssignableFrom(javaClass)
&& JAVA_COMPARE_METHOD_NAME.equals(methodName)) {
//check if the method is "compareTo"
METHOD_JUMP_TABLE.putIfAbsent(method, MemberType.COMPARE);
} else {
//check if the method is one of the special methods
try {
JavaSpecialMethod.valueOf(methodName);
METHOD_JUMP_TABLE.putIfAbsent(method, MemberType.SPECIAL);
} catch (final IllegalArgumentException ex) {
//the method is not one of the special methods. move on.
//check if the method is one of the PyProxy interface methods
try {
PyProxyInterfaceMethod.valueOf(methodName);
METHOD_JUMP_TABLE.putIfAbsent(method, MemberType.PYPROXY_INTERFACE);
} catch (final IllegalArgumentException e) {
//the method is not one of the PyProxy interface methods.
//move on.
}
}
}
}
//check if the method has already been registered in the jump table
//if so invoke it using the method type registered in the table
if (METHOD_JUMP_TABLE.containsKey(method)) {
return METHOD_JUMP_TABLE.get(method)
.invoke(pyObject, javaClass, method, args, pyImportName);
}
// try each method types one by one to guess the correct one
for (final MemberType methodType : MemberType.values()) {
try {
final Object retVal = methodType.invoke(
pyObject, javaClass, method, args, pyImportName);
METHOD_JUMP_TABLE.putIfAbsent(method, methodType);
return retVal;
} catch (final NoSuchMethodException ex) {
continue;
}
}
//all checks failed. throw NoSuchMethodException
METHOD_JUMP_TABLE.putIfAbsent(method, MemberType.NO_SUCH_METHOD);
throw new NoSuchMethodException(
_("JyWrapper.15", "method", methodName, pyImportName)); //$NON-NLS-1$ //$NON-NLS-2$
}
/**
* @param args Arguments to initialize the underlying Python class.
* @param pyImport
* @param pyImportName
* @param javaClass
* @return An initialized (wrapped) Python class instance, ready to be used.
*/
private static <T> T initialize(final PyObject pyImport, final String pyImportName,
final Class<T> javaClass, final Object... args) {
if (javaClass == null) {
throw new IllegalStateException(_("JyWrapper.6", "javaClass")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (pyImportName == null) {
throw new IllegalArgumentException(_("JyWrapper.6", "pyImportName")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (pyImport instanceof PyModule) {
throw new PythonImportInstantiationError(_("JyWrapper.4", pyImportName)); //$NON-NLS-1$
}
if (!(pyImport instanceof PyType)) {
throw new PythonImportInstantiationError(_("JyWrapper.9")); //$NON-NLS-1$
}
try {
return Util.py2Java(pyImport.__call__(Util.convertArgs(args)), javaClass);
} catch (final PyException e) {
if (e.type.equals(Py.TypeError)) {
throw new PythonImportInstantiationError(
_("JyWrapper.3", pyImportName), e); //$NON-NLS-1$
}
throw e;
} catch (final IllegalArgumentException e) {
throw new IllegalArgumentException(
_("JyWrapper.2", pyImportName, javaClass.getName())); //$NON-NLS-1$
}
}
private static Object findAndInvokePyMethod(final PyObject pyObject,
final Class<?> javaReturnType, final String methodName, final Object[] args)
throws NoSuchMethodException {
PyObject pyAttr;
synchronized (pyObject) {
pyAttr = pyObject.__findattr__(methodName);
}
if (pyAttr instanceof org.python.core.PyMethod || pyAttr instanceof PyFunction) {
return invokePyMethod(pyObject, javaReturnType, methodName, args);
} else {
throw new NoSuchMethodException();
}
}
private static Object invokePyMethod(final PyObject pyObject,
final Class<?> javaReturnType, final String methodName, final Object[] args) {
PyObject pyReturnValue;
try {
final PyObject[] pyArgs = Util.convertArgs(args);
synchronized (pyObject) {
pyReturnValue = pyObject.invoke(methodName, pyArgs);
}
} catch (final PyException e) {
if (e.type.equals(Py.TypeError)) {
throw new IllegalArgumentException(
_("JyWrapper.10", methodName), e); //$NON-NLS-1$
}
throw e;
}
if (pyReturnValue == Py.None) {
return "void".equals(javaReturnType.getName()) ? Void.TYPE : null; //$NON-NLS-1$
}
return Util.py2Java(pyReturnValue, javaReturnType);
}
}

Zobrazit soubor

@ -0,0 +1,75 @@
package net.abhinavsarkar.jywrapper;
import static net.abhinavsarkar.jywrapper.Messages._;
import org.python.core.Py;
import org.python.core.PyFunction;
import org.python.core.PyModule;
import org.python.core.PyObject;
import org.python.core.PyString;
import org.python.core.PyType;
final class Util {
private Util() {
}
static <T> T py2Java(final PyObject pyObject, final Class<T> javaClass) {
final Object javaWrapper = pyObject.__tojava__(javaClass);
if (javaWrapper == Py.NoConversion) {
if (javaClass.isInterface()) {
return PyObjectProxy.newInstance(pyObject, javaClass);
} else {
throw new IllegalArgumentException(
_("JyWrapper.1", pyObject, javaClass.getName())); //$NON-NLS-1$
}
} else {
@SuppressWarnings("unchecked")
final T t = (T) javaWrapper;
return t;
}
}
static PyObject[] convertArgs(final Object[] args) {
if (args == null || args.length == 0) {
return new PyObject[0];
}
if (args.length == 1) {
return new PyObject[] { Py.java2py(args[0]) };
}
final PyObject[] pyArgs = new PyObject[args.length];
for (int i = args.length; --i >= 0;) {
pyArgs[i] = Py.java2py(args[i]);
}
return pyArgs;
}
static String getPyImportName(final PyObject pyObject) {
synchronized (pyObject) {
if (pyObject instanceof PyType) {
final PyType pyType = (PyType) pyObject;
final PyObject module = pyType.getModule();
if (module instanceof PyString
&& !module.toString().equals("__builtin__")) { //$NON-NLS-1$
return String.format("%s.%s", module.toString(), //$NON-NLS-1$
pyType.getName());
}
return pyType.getName();
} else if (pyObject instanceof PyModule) {
return ((PyModule) pyObject).toString();
} else if (pyObject instanceof PyFunction) {
final PyFunction pyFunction = (PyFunction) pyObject;
return String.format("%s.%s", pyFunction.__module__, //$NON-NLS-1$
pyFunction.__name__);
} else {
return getPyImportName(pyObject.getType());
}
}
}
static String camelCase2UnderScore(final String word) {
return word.replaceAll("([A-Z])", "_$1").toLowerCase(); //$NON-NLS-1$ //$NON-NLS-2$
}
}

Zobrazit soubor

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package net.abhinavsarkar.jywrapper.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import net.abhinavsarkar.jywrapper.PyAttributeType;
@Documented
@Target({ ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
public @interface PyAttribute {
PyAttributeType type();
String attribute() default "";
}

Zobrazit soubor

@ -0,0 +1,17 @@
package net.abhinavsarkar.jywrapper.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import net.abhinavsarkar.jywrapper.PyMethodType;
@Documented
@Target({ ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
public @interface PyMethod {
PyMethodType type();
String method() default "";
}

Zobrazit soubor

@ -0,0 +1,14 @@
package net.abhinavsarkar.jywrapper.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Documented
@Target({ ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
public @interface Wraps {
String value();
}

Zobrazit soubor

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package net.abhinavsarkar.jywrapper.exception;
/**
* @author AbhinavSarkar
*
*/
public class PythonImportInstantiationError extends RuntimeException {
private static final long serialVersionUID = -6419405475631226539L;
public PythonImportInstantiationError() {
}
public PythonImportInstantiationError(String message) {
super(message);
}
public PythonImportInstantiationError(Throwable cause) {
super(cause);
}
public PythonImportInstantiationError(String message, Throwable cause) {
super(message, cause);
}
}

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package net.abhinavsarkar.jywrapper.exception;
/**
* @author AbhinavSarkar
*
*/
public class PythonImportNotFoundException extends RuntimeException {
private static final long serialVersionUID = 3287534701588858305L;
public PythonImportNotFoundException() {
}
public PythonImportNotFoundException(String message) {
super(message);
}
public PythonImportNotFoundException(Throwable cause) {
super(cause);
}
public PythonImportNotFoundException(String message, Throwable cause) {
super(message, cause);
}
}

Zobrazit soubor

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JyWrapper.0="{0}" is not a Python Function
JyWrapper.1=Cannot convert Python object: {0} to a Java object of class {1}
JyWrapper.2=Cannot convert Python Type {0} to Java Class {1}
JyWrapper.3=Cannot not instantiate the Python type: {0}
JyWrapper.4=Python module {0} can be instantiated statically only
JyWrapper.5={0} is not a Python Type or Module
JyWrapper.6=parameter "{0}" is null
JyWrapper.7=No Python import name annotated on the Java Class {0}
JyWrapper.8={0} is not an Interface
JyWrapper.9=Cannot instantiate a Python non type
JyWrapper.10=Instance method "{0}" called on a Python Type
JyWrapper.11=No comparison methods found in the backing Python object
JyWrapper.12=Trying to get instance attribute "{0}" from a Python Type
JyWrapper.13=Can''t set attribute: {0}
JyWrapper.14=Trying to set instance attribute "{0}" in a python class
JyWrapper.15=No {0} named "{1}" in the backing Python Type {2}
PyImportLoader.1=Python Import "{0}" not found in pythonpath