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/*
* OJSystem.java
*
* System environments.
*
* @author Michiaki Tatsubori
* @version %VERSION% %DATE%
* @see java.lang.Object
*
* COPYRIGHT 1998 by Michiaki Tatsubori, ALL RIGHTS RESERVED.
*/
package io.devnulllabs.openjava.mop;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Hashtable;
import java.util.Vector;
import io.devnulllabs.openjava.ojc.JavaCompiler;
import io.devnulllabs.openjava.tools.DebugOut;
import io.devnulllabs.openjava.tools.parser.ParseException;
/**
* The class <code>OJSystem</code>
* <p>
* For example
* <pre>
* </pre>
* <p>
*
* @author Michiaki Tatsubori
* @version 1.0
* @since $Id: OJSystem.java,v 1.2 2003/02/19 02:55:01 tatsubori Exp $
* @see java.lang.Object
*/
public class OJSystem {
/** class object for primitive type boolean */
public static OJClass BOOLEAN;
/** class object for primitive type byte */
public static OJClass BYTE;
/** class object for primitive type char */
public static OJClass CHAR;
/** class object for primitive type short */
public static OJClass SHORT;
/** class object for primitive type int */
public static OJClass INT;
/** class object for primitive type long */
public static OJClass LONG;
/** class object for primitive type float */
public static OJClass FLOAT;
/** class object for primitive type double */
public static OJClass DOUBLE;
/** class object for primitive type void */
public static OJClass VOID;
/** class object for java.lang.String */
public static OJClass STRING;
/** class object for java.lang.Object */
public static OJClass OBJECT;
/** class object for type of null literal */
public static OJClass NULLTYPE;
/** inner use only */
public static final void initConstants() {
BOOLEAN = OJClass.forClass(boolean.class);
BYTE = OJClass.forClass(byte.class);
CHAR = OJClass.forClass(char.class);
SHORT = OJClass.forClass(short.class);
INT = OJClass.forClass(int.class);
LONG = OJClass.forClass(long.class);
FLOAT = OJClass.forClass(float.class);
DOUBLE = OJClass.forClass(double.class);
VOID = OJClass.forClass(void.class);
STRING = OJClass.forClass(String.class);
OBJECT = OJClass.forClass(Object.class);
NULLTYPE = new OJClass();
env.record(NULLTYPE_NAME, NULLTYPE);
}
/**
* The system dependent newline string.
*/
public static String NextLineChar;
static {
StringWriter strw = new StringWriter();
PrintWriter pw = new PrintWriter(strw);
pw.println();
pw.close();
NextLineChar = strw.toString();
}
/**
* The type name for null.
*/
public static final String NULLTYPE_NAME = "<type>null";
/**
* The global system environment for all public classes.
*/
public static final GlobalEnvironment env = new GlobalEnvironment();
private static final Vector additionalClasses = new Vector();
/**
* Adds an new public class to be generated.
*/
public static void addNewClass(OJClass clazz) throws MOPException {
additionalClasses.addElement(clazz);
OJSystem.env.record(clazz.getName(), clazz);
}
/* internal uses */
private static JavaCompiler javac = null;
/** internal use only */
public static JavaCompiler getJavaCompiler() {
return javac;
}
/** internal use only */
public static void setJavaCompiler(JavaCompiler c) {
javac = c;
}
/** internal use only */
public static OJClass[] addedClasses() {
OJClass[] result = new OJClass[additionalClasses.size()];
for (int i = 0; i < result.length; ++i) {
result[i] = (OJClass) additionalClasses.elementAt(i);
}
return result;
}
private static Hashtable table = new Hashtable();
/** internal use only */
public static void metabind(String clazz, String metaclazz)
throws ParseException {
/* null - default */
if (metaclazz == null) {
if (table.get(clazz) != null)
return;
metaclazz = "io.devnulllabs.openjava.mop.OJClass";
}
Class c;
try {
c = Class.forName(metaclazz);
} catch (ClassNotFoundException e) {
throw new ParseException(e.toString());
}
DebugOut.println("class " + clazz + " : " + metaclazz);
table.put(clazz, c);
}
/** internal use only */
public static Class getMetabind(String clazz) {
Class result = searchMetaclassInTable(clazz);
if (result == null)
result = OJClass.class;
return result;
}
private static Class searchMetaclassInTable(String clazz) {
/* exactly specified name */ {
Class result = (Class) table.get(clazz);
if (result != null)
return result;
}
/* a name specified using "*" (all classes in a package)
* More specific indication has more priority.
* e.g. "java.lang.*" is stronger than "java.*"
*/ {
Class result = (Class) table.get(toPackageSuffix(clazz) + "*");
if (result != null)
return result;
}
/* a name specified using "-" (all subpackages)
* More specific indication has more priority.
* e.g. "java.lang.-" is stronger than "java.-"
*/ {
Class result = (Class) table.get(toPackageSuffix(clazz) + "-");
if (result != null)
return result;
}
for (String pack = toPackage(clazz);
pack != null;
pack = toPackage(pack)) {
Class result = (Class) table.get(toPackageSuffix(pack) + "-");
if (result != null)
return result;
}
/* nothing found */
return null;
}
/* returns "java.lang." for "java.lang.String" and "" for "String" */
private static String toPackageSuffix(String classname) {
int pack = classname.lastIndexOf(".") + 1;
return classname.substring(0, pack);
}
/* returns "java.lang" for "java.lang.String" and null for "String" */
private static String toPackage(String classname) {
int pack = classname.lastIndexOf(".");
if (pack == -1)
return null;
return classname.substring(0, pack);
}
/** internal use only */
public static Object orderingLock;
/** internal use only */
public static OJClass waited = null;
/** internal use only */
public static final Hashtable underConstruction = new Hashtable();
/** internal use only */
public static final Vector waitingPool = new Vector();
}
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