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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
/*
* CodegenUtils.java
*
* Created on January 31, 2007, 11:54 AM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package org.python.modules.jffi;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Type;
import java.util.Arrays;
import java.util.Map;
/**
*
* @author headius
*/
public class CodegenUtils {
/**
* Creates a dotted class name from a path/package name
*/
public static String c(String p) {
return p.replace('/', '.');
}
/**
* Creates a class path name, from a Class.
*/
public static String p(Class n) {
return n.getName().replace('.','/');
}
/**
* Creates a class identifier of form Labc/abc;, from a Class.
*/
public static String ci(Class n) {
if (n.isArray()) {
n = n.getComponentType();
if (n.isPrimitive()) {
if (n == Byte.TYPE) {
return "[B";
} else if (n == Boolean.TYPE) {
return "[Z";
} else if (n == Short.TYPE) {
return "[S";
} else if (n == Character.TYPE) {
return "[C";
} else if (n == Integer.TYPE) {
return "[I";
} else if (n == Float.TYPE) {
return "[F";
} else if (n == Double.TYPE) {
return "[D";
} else if (n == Long.TYPE) {
return "[J";
} else {
throw new RuntimeException("Unrecognized type in compiler: " + n.getName());
}
} else {
return "[" + ci(n);
}
} else {
if (n.isPrimitive()) {
if (n == Byte.TYPE) {
return "B";
} else if (n == Boolean.TYPE) {
return "Z";
} else if (n == Short.TYPE) {
return "S";
} else if (n == Character.TYPE) {
return "C";
} else if (n == Integer.TYPE) {
return "I";
} else if (n == Float.TYPE) {
return "F";
} else if (n == Double.TYPE) {
return "D";
} else if (n == Long.TYPE) {
return "J";
} else if (n == Void.TYPE) {
return "V";
} else {
throw new RuntimeException("Unrecognized type in compiler: " + n.getName());
}
} else {
return "L" + p(n) + ";";
}
}
}
/**
* Creates a human-readable representation, from a Class.
*/
public static String human(Class n) {
return n.getCanonicalName();
}
public static String humanShort(Class n) {
return n.getSimpleName();
}
/**
* Create a method signature from the given param types and return values
*/
public static String sig(Class retval, Class... params) {
return sigParams(params) + ci(retval);
}
public static String sig(Class[] retvalParams) {
Class[] justParams = new Class[retvalParams.length - 1];
System.arraycopy(retvalParams, 1, justParams, 0, justParams.length);
return sigParams(justParams) + ci(retvalParams[0]);
}
public static String sig(Class retval, String descriptor, Class... params) {
return sigParams(descriptor, params) + ci(retval);
}
public static String sigParams(Class... params) {
StringBuilder signature = new StringBuilder("(");
for (int i = 0; i < params.length; i++) {
signature.append(ci(params[i]));
}
signature.append(")");
return signature.toString();
}
public static String sigParams(String descriptor, Class... params) {
StringBuilder signature = new StringBuilder("(");
signature.append(descriptor);
for (int i = 0; i < params.length; i++) {
signature.append(ci(params[i]));
}
signature.append(")");
return signature.toString();
}
public static String pretty(Class retval, Class... params) {
return prettyParams(params) + human(retval);
}
public static String prettyParams(Class... params) {
StringBuilder signature = new StringBuilder("(");
for (int i = 0; i < params.length; i++) {
signature.append(human(params[i]));
if (i < params.length - 1) signature.append(',');
}
signature.append(")");
return signature.toString();
}
public static String prettyShortParams(Class... params) {
StringBuilder signature = new StringBuilder("(");
for (int i = 0; i < params.length; i++) {
signature.append(humanShort(params[i]));
if (i < params.length - 1) signature.append(',');
}
signature.append(")");
return signature.toString();
}
public static Class[] params(Class... classes) {
return classes;
}
public static Class[] params(Class cls, int times) {
Class[] classes = new Class[times];
Arrays.fill(classes, cls);
return classes;
}
public static Class[] params(Class cls1, Class clsFill, int times) {
Class[] classes = new Class[times + 1];
Arrays.fill(classes, clsFill);
classes[0] = cls1;
return classes;
}
public static Class[] params(Class cls1, Class cls2, Class clsFill, int times) {
Class[] classes = new Class[times + 2];
Arrays.fill(classes, clsFill);
classes[0] = cls1;
classes[1] = cls2;
return classes;
}
public static String getAnnotatedBindingClassName(String javaMethodName, String typeName, boolean isStatic, int required, int optional, boolean multi, boolean framed) {
String commonClassSuffix;
if (multi) {
commonClassSuffix = (isStatic ? "$s$" : "$i$" ) + javaMethodName;
} else {
commonClassSuffix = (isStatic ? "$s$" : "$i$" ) + required + "$" + optional + "$" + javaMethodName;
}
return typeName + commonClassSuffix;
}
public static void visitAnnotationFields(AnnotationVisitor visitor, Map fields) {
for (Map.Entry fieldEntry : fields.entrySet()) {
Object value = fieldEntry.getValue();
if (value.getClass().isArray()) {
Object[] values = (Object[]) value;
AnnotationVisitor arrayV = visitor.visitArray(fieldEntry.getKey());
for (int i = 0; i < values.length; i++) {
arrayV.visit(null, values[i]);
}
arrayV.visitEnd();
} else if (value.getClass().isEnum()) {
visitor.visitEnum(fieldEntry.getKey(), ci(value.getClass()), value.toString());
} else if (value instanceof Class) {
visitor.visit(fieldEntry.getKey(), Type.getType((Class) value));
} else {
visitor.visit(fieldEntry.getKey(), value);
}
}
}
public static Class getBoxType(Class type) {
if (type == int.class) {
return Integer.class;
} else if (type == byte.class) {
return Byte.class;
} else if (type == short.class) {
return Short.class;
} else if (type == char.class) {
return Character.class;
} else if (type == long.class) {
return Long.class;
} else if (type == float.class) {
return Float.class;
} else if (type == double.class) {
return Double.class;
} else if (type == boolean.class) {
return Boolean.class;
} else {
throw new RuntimeException("Not a native type: " + type);
}
}
}