OJ (aka OpenJava) modernization/mirroring

Signed-off-by: Kenny Ballou <kballou@devnulllabs.io>

9 files changed, 336 insertions, 0 deletions

diff --git a/tutorial/examples/mixin/0UNDERCONSTRUCTION b/tutorial/examples/mixin/0UNDERCONSTRUCTION
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tutorial/examples/mixin/0UNDERCONSTRUCTION
diff --git a/tutorial/examples/mixin/MixinedClass.java b/tutorial/examples/mixin/MixinedClass.java
new file mode 100644
index 0000000..c281fb9
--- /dev/null
+++ b/tutorial/examples/mixin/MixinedClass.java
@@ -0,0 +1,124 @@
+/*
+ * This code was generated by ojc.
+ */
+/*
+ * MixinedClass.oj
+ *
+ * An OpenJava example for incorporating mixin mechanism.
+ *
+ * @author   Michiaki Tatsubori
+ * @version  %VERSION% %DATE%
+ * @see      java.lang.Object
+ *
+ * COPYRIGHT 1999 by Michiaki Tatsubori, ALL RIGHTS RESERVED.
+ */
+package examples.mixin;
+
+
+import java.lang.Object;
+import openjava.mop.*;
+import openjava.ptree.*;
+import openjava.syntax.*;
+
+
+/**
+ * The metaclass <code>MixinedClass</code> supports classes
+ * using mixin.
+ * <p>
+ * For example, the class <code>MixinedClass</code>:
+ * <pre>
+ * public class TextboxWithUndo instantiates MixinedClass
+ *    extends Textbox mixs Undo
+ * {
+ * }
+ * </pre>
+ * would be automatically implemented.
+ * <p>
+ *
+ * @author   Michiaki Tatsubori
+ * @version  1.0
+ * @since    $Id: MixinedClass.java,v 1.2 2003/02/19 02:55:01 tatsubori Exp $
+ * @see java.lang.Object
+ */
+public class MixinedClass extends OJClass
+{
+
+    public static final String KEY_MIXES = "mixes";
+
+    /* overrides for translation */
+    public void translateDefinition()
+        throws MOPException
+    {
+        OJClass[] mixinClasses = getMixins();
+        for (int i = 0; i < mixinClasses.length; ++i) {
+            incorporateMixin( mixinClasses[i] );
+        }
+    }
+
+    public void incorporateMixin( OJClass mixinClazz )
+        throws MOPException
+    {
+        addInterface( mixinClazz );
+        OJMethod[] mixeds = mixinClazz.getMethods();
+        for (int i = 0; i < mixeds.length; ++i) {
+            addMethod( makeEmptyMethod( mixeds[i] ) );
+        }
+    }
+
+    /**
+     * Generates a empty method with specified name.
+     *
+     * @param  name  generating method's name.
+     * @param forwarded  method to which the generated method forwards.
+     * @return  a generated empty method.
+     */
+    private OJMethod makeEmptyMethod( OJMethod implementee )
+        throws MOPException
+    {
+        StatementList body = new StatementList();
+        if (implementee.getReturnType() == OJSystem.VOID) {
+            body.add( new ReturnStatement() );
+        } else {
+            body.add( new ReturnStatement( Literal.constantNull() ) );
+        }
+        return new OJMethod( this, implementee.getModifiers().remove( OJModifier.ABSTRACT ), implementee.getReturnType(), implementee.getName(), implementee.getParameterTypes(), implementee.getExceptionTypes(), body );
+    }
+
+    /* extended information */
+    private OJClass[] getMixins()
+        throws MOPException
+    {
+        ObjectList suffix = (ObjectList) getSuffix( KEY_MIXES );
+        OJClass[] result = new OJClass[suffix.size()];
+        for (int i = 0; i < result.length; ++i) {
+            result[i] = OJClass.forName( suffix.get( i ).toString() );
+        }
+        return result;
+    }
+
+    /* override to extend syntax */
+    public static boolean isRegisteredKeyword( String keyword )
+    {
+        return keyword.equals( KEY_MIXES );
+    }
+
+    /* override to extend syntax */
+    public static SyntaxRule getDeclSuffixRule( String keyword )
+    {
+        if (keyword.equals( KEY_MIXES )) {
+            return new DefaultListRule( new TypeNameRule(), TokenID.COMMA );
+        }
+        return null;
+    }
+
+    public MixinedClass( openjava.mop.Environment oj_param0, openjava.mop.OJClass oj_param1, openjava.ptree.ClassDeclaration oj_param2 )
+    {
+        super( oj_param0, oj_param1, oj_param2 );
+    }
+
+    public MixinedClass( java.lang.Class oj_param0, openjava.mop.MetaInfo oj_param1 )
+    {
+        super( oj_param0, oj_param1 );
+    }
+
+}
diff --git a/tutorial/examples/mixin/MixinedClass.oj b/tutorial/examples/mixin/MixinedClass.oj
new file mode 100644
index 0000000..8883948
--- /dev/null
+++ b/tutorial/examples/mixin/MixinedClass.oj
@@ -0,0 +1,115 @@
+/*

+ * MixinedClass.oj

+ *

+ * An OpenJava example for incorporating mixin mechanism.

+ *

+ * @author   Michiaki Tatsubori

+ * @version  %VERSION% %DATE%

+ * @see      java.lang.Object

+ *

+ * COPYRIGHT 1999 by Michiaki Tatsubori, ALL RIGHTS RESERVED.

+ */

+package examples.mixin;

+

+

+import java.lang.Object;

+import openjava.mop.*;

+import openjava.ptree.*;

+import openjava.syntax.*;

+

+

+/**

+ * The metaclass <code>MixinedClass</code> supports classes

+ * using mixin.

+ * <p>

+ * For example, the class <code>MixinedClass</code>:

+ * <pre>

+ * public class TextboxWithUndo instantiates MixinedClass

+ *    extends Textbox mixs Undo

+ * {

+ * }

+ * </pre>

+ * would be automatically implemented.

+ * <p>

+ *

+ * @author   Michiaki Tatsubori

+ * @version  1.0

+ * @since    %SOFTWARE% 1.0

+ * @see java.lang.Object

+ */

+public class MixinedClass instantiates Metaclass extends OJClass

+{

+

+    public static final String KEY_MIXES = "mixes";

+

+    /* overrides for translation */

+    public void translateDefinition() throws MOPException {

+    OJClass[] mixinClasses = getMixins();

+

+    for (int i = 0; i < mixinClasses.length; ++i) {

+        incorporateMixin(mixinClasses[i]);

+    }

+    }

+

+    public void incorporateMixin(OJClass mixinClazz) throws MOPException {

+        /* implicit forwarding to the same signature's */

+    addInterface(mixinClazz);

+        OJMethod[] mixeds = mixinClazz.getMethods();

+        for (int i = 0; i < mixeds.length; ++i) {

+            /* generate a forwarding method with forwarded's name */

+            addMethod(makeEmptyMethod(mixeds[i]));

+        }

+    }

+

+    /**

+     * Generates a empty method with specified name.

+     *

+     * @param  name  generating method's name.

+     * @param forwarded  method to which the generated method forwards.

+     * @return  a generated empty method.

+     */

+    private OJMethod makeEmptyMethod(OJMethod implementee)

+        throws MOPException

+    {

+    /* generates a return statement */

+        StatementList body = new StatementList();

+        if (implementee.getReturnType() == OJSystem.VOID) {

+            body.add(new ReturnStatement());

+        } else {

+            body.add(new ReturnStatement(Literal.constantNull()));

+        }

+

+        /* generates a new method without body */

+    return new OJMethod( this,

+        implementee.getModifiers().remove(OJModifier.ABSTRACT),

+        implementee.getReturnType(), implementee.getName(),

+        implementee.getParameterTypes(), implementee.getExceptionTypes(),

+        body );

+    }

+

+    /* extended information */

+

+    private OJClass[] getMixins() throws MOPException {

+        ObjectList suffix = (ObjectList) getSuffix(KEY_MIXES);

+    OJClass[] result = new OJClass[suffix.size()];

+    for (int i = 0; i < result.length; ++i) {

+        result[i] = OJClass.forName(suffix.get(i).toString());

+    }

+    return result;

+    }

+

+    /* override to extend syntax */

+    public static boolean isRegisteredKeyword( String keyword ) {

+        return keyword.equals( KEY_MIXES );

+    }

+

+    /* override to extend syntax */

+    public static SyntaxRule getDeclSuffixRule( String keyword ) {

+    if (keyword.equals( KEY_MIXES )) {

+        return new DefaultListRule(new TypeNameRule(), TokenID.COMMA);

+    }

+    return null;

+    }

+

+}

+

diff --git a/tutorial/examples/mixin/Textbox.java b/tutorial/examples/mixin/Textbox.java
new file mode 100644
index 0000000..5b0e06b
--- /dev/null
+++ b/tutorial/examples/mixin/Textbox.java
@@ -0,0 +1,23 @@
+/*
+ * This code was generated by ojc.
+ */
+package examples.mixin;
+
+
+public class Textbox extends java.awt.Component
+{
+
+    String text = null;
+
+    /* ..... */
+    public String getText()
+    {
+        return text;
+    }
+
+    public void setText( String s )
+    {
+        text = s;
+    }
+
+}
diff --git a/tutorial/examples/mixin/Textbox.oj b/tutorial/examples/mixin/Textbox.oj
new file mode 100644
index 0000000..a3313d0
--- /dev/null
+++ b/tutorial/examples/mixin/Textbox.oj
@@ -0,0 +1,17 @@
+package examples.mixin;

+

+

+public class Textbox extends java.awt.Component

+{

+    String text = null;

+

+    /* ..... */

+

+    public String getText() {

+    return text;

+    }

+

+    public void setText(String s) {

+    text = s;

+    }

+}

diff --git a/tutorial/examples/mixin/TextboxWithUndo.java b/tutorial/examples/mixin/TextboxWithUndo.java
new file mode 100644
index 0000000..9772e62
--- /dev/null
+++ b/tutorial/examples/mixin/TextboxWithUndo.java
@@ -0,0 +1,22 @@
+/*
+ * This code was generated by ojc.
+ */
+package examples.mixin;
+
+
+public class TextboxWithUndo extends Textbox implements examples.mixin.Undo
+{
+
+    
+    public void setText( java.lang.String oj_param0 )
+    {
+        return;
+    }
+
+    
+    public void undo()
+    {
+        return;
+    }
+
+}
diff --git a/tutorial/examples/mixin/TextboxWithUndo.oj b/tutorial/examples/mixin/TextboxWithUndo.oj
new file mode 100644
index 0000000..cc04f88
--- /dev/null
+++ b/tutorial/examples/mixin/TextboxWithUndo.oj
@@ -0,0 +1,8 @@
+package examples.mixin;

+

+

+public class TextboxWithUndo instantiates MixinedClass

+    extends Textbox

+    mixes Undo

+{

+}

diff --git a/tutorial/examples/mixin/Undo.java b/tutorial/examples/mixin/Undo.java
new file mode 100644
index 0000000..a7f6bfb
--- /dev/null
+++ b/tutorial/examples/mixin/Undo.java
@@ -0,0 +1,8 @@
+package examples.mixin;
+
+
+public interface Undo
+{
+    public void setText(String s);
+    public void undo();
+}
diff --git a/tutorial/examples/mixin/Undo.oj b/tutorial/examples/mixin/Undo.oj
new file mode 100644
index 0000000..66ad9a9
--- /dev/null
+++ b/tutorial/examples/mixin/Undo.oj
@@ -0,0 +1,19 @@
+package examples.mixin;

+

+

+public class Undo

+{

+    inherited String getText();

+    inherited void setText(String s);

+

+    String lastText;

+

+    public void setText(String s) {

+    lastText = getText();

+    super.setText(s);

+    }

+

+    public void undo() {

+    super.setText(lastText);

+    }

+}