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Modified field marshalling code to work on any object rather than being

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DObject specific (because it didn't need to be).


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@911 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2002-02-01 23:26:49 +00:00
parent d925c5d1b4
commit ef9e0bc53f
15 changed files with 131 additions and 124 deletions
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src/java/com/threerings/presents/dobj/io/DObjectFactory.java
+8 -25
View File
@@ -1,12 +1,11 @@
//
// $Id: DObjectFactory.java,v 1.9 2001/10/16 16:44:20 mdb Exp $
// $Id: DObjectFactory.java,v 1.10 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
import java.io.IOException;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.util.HashMap;
import com.threerings.presents.Log;
import com.threerings.presents.dobj.DObject;
@@ -27,15 +26,13 @@ public class DObjectFactory
throws IOException
{
// Log.info("Marshalling object: " + dobj);
// look up the marshaller for this object
Class clazz = dobj.getClass();
Marshaller marsh = getMarshaller(clazz);
// then write the class of the object to the stream
out.writeUTF(clazz.getName());
// write the class of the object to the stream
out.writeUTF(dobj.getClass().getName());
// write out the oid
out.writeInt(dobj.getOid());
// then use the marshaller to write the object itself
marsh.writeTo(out, dobj);
Marshaller.writeObject(out, dobj);
}
/**
@@ -49,12 +46,11 @@ public class DObjectFactory
Class clazz = Class.forName(in.readUTF());
DObject dobj = (DObject)clazz.newInstance();
dobj.setOid(in.readInt()); // read and set the oid
// Log.info("Unmarshalling object: " + dobj);
// look up the marshaller for that class
Marshaller marsh = getMarshaller(clazz);
// use it to reconstitute the object from the stream
marsh.readFrom(in, dobj);
// use a marshaller to reconstitute the object from the stream
Marshaller.readObject(in, dobj);
return dobj;
@@ -63,17 +59,4 @@ public class DObjectFactory
throw new ObjectStreamException(errmsg, e);
}
}
protected static Marshaller getMarshaller (Class clazz)
throws IOException
{
Marshaller marsh = (Marshaller)_marshallers.get(clazz);
// create a new marshaller if we don't already have one
if (marsh == null) {
_marshallers.put(clazz, marsh = new Marshaller(clazz));
}
return marsh;
}
protected static HashMap _marshallers = new HashMap();
}
src/java/com/threerings/presents/io/BooleanFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: BooleanFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: BooleanFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class BooleanFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public boolean prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeBoolean(field.getBoolean(dobj));
out.writeBoolean(field.getBoolean(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setBoolean(dobj, in.readBoolean());
field.setBoolean(obj, in.readBoolean());
}
}
src/java/com/threerings/presents/io/DSetFieldMarshaller.java
+5 -6
View File
@@ -1,5 +1,5 @@
//
// $Id: DSetFieldMarshaller.java,v 1.2 2001/10/11 04:07:52 mdb Exp $
// $Id: DSetFieldMarshaller.java,v 1.3 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,7 +8,6 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
import com.threerings.presents.dobj.DSet;
public class DSetFieldMarshaller implements FieldMarshaller
@@ -16,10 +15,10 @@ public class DSetFieldMarshaller implements FieldMarshaller
/** This is the sort of field that we marshall. */
public DSet prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
DSet value = (DSet)field.get(dobj);
DSet value = (DSet)field.get(obj);
// we freak out if our set is null
if (value == null) {
throw new IllegalAccessException("No set instance to marshall!");
@@ -27,11 +26,11 @@ public class DSetFieldMarshaller implements FieldMarshaller
value.writeTo(out);
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
DSet value = new DSet();
value.readFrom(in);
field.set(dobj, value);
field.set(obj, value);
}
}
src/java/com/threerings/presents/io/DoubleFieldMarshaller.java
+5 -7
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@@ -1,5 +1,5 @@
//
// $Id: DoubleFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: DoubleFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class DoubleFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public double prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeDouble(field.getDouble(dobj));
out.writeDouble(field.getDouble(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setDouble(dobj, in.readDouble());
field.setDouble(obj, in.readDouble());
}
}
src/java/com/threerings/presents/io/FieldMarshaller.java
+3 -5
View File
@@ -1,5 +1,5 @@
//
// $Id: FieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: FieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,8 +8,6 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
/**
* A field marshaller knows how to marshall and unmarshall a particular
* data type. It is called upon to do the actual on the wire
@@ -17,9 +15,9 @@ import com.threerings.presents.dobj.DObject;
*/
public interface FieldMarshaller
{
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException;
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException;
}
src/java/com/threerings/presents/io/FloatFieldMarshaller.java
+5 -7
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@@ -1,5 +1,5 @@
//
// $Id: FloatFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: FloatFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class FloatFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public float prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeFloat(field.getFloat(dobj));
out.writeFloat(field.getFloat(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setFloat(dobj, in.readFloat());
field.setFloat(obj, in.readFloat());
}
}
src/java/com/threerings/presents/io/IntArrayFieldMarshaller.java
+5 -7
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@@ -1,5 +1,5 @@
//
// $Id: IntArrayFieldMarshaller.java,v 1.1 2001/10/17 02:56:51 mdb Exp $
// $Id: IntArrayFieldMarshaller.java,v 1.2 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,17 +8,15 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class IntArrayFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public int[] prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
int[] value = (int[])field.get(dobj);
int[] value = (int[])field.get(obj);
// we convert null arrays to zero length arrays
if (value == null) {
out.writeInt(0);
@@ -31,13 +29,13 @@ public class IntArrayFieldMarshaller implements FieldMarshaller
}
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
int[] value = new int[in.readInt()];
for (int i = 0; i < value.length; i++) {
value[i] = in.readInt();
}
field.set(dobj, value);
field.set(obj, value);
}
}
src/java/com/threerings/presents/io/IntFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: IntFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: IntFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class IntFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public int prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeInt(field.getInt(dobj));
out.writeInt(field.getInt(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setInt(dobj, in.readInt());
field.setInt(obj, in.readInt());
}
}
src/java/com/threerings/presents/io/LongFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: LongFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: LongFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class LongFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public long prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeLong(field.getLong(dobj));
out.writeLong(field.getLong(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setLong(dobj, in.readLong());
field.setLong(obj, in.readLong());
}
}
src/java/com/threerings/presents/io/Marshaller.java
+59 -12
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@@ -1,5 +1,5 @@
//
// $Id: Marshaller.java,v 1.6 2002/02/01 22:35:06 mdb Exp $
// $Id: Marshaller.java,v 1.7 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -9,12 +9,12 @@ import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import com.threerings.presents.Log;
import com.threerings.presents.dobj.DObject;
import com.threerings.presents.io.ObjectStreamException;
/**
@@ -24,7 +24,47 @@ import com.threerings.presents.io.ObjectStreamException;
*/
public class Marshaller
{
public Marshaller (Class clazz)
/**
* Writes the supplied object instance out to the supplied data output
* stream, using a {@link Marshaller} for field marshalling.
*/
public static void writeObject (DataOutputStream out, Object object)
throws IOException
{
getMarshaller(object).writeTo(out, object);
}
/**
* Populates the fields of the supplied object from the supplied data
* input stream, using a {@link Marshaller} for field unmarshalling.
*/
public static void readObject (DataInputStream in, Object object)
throws IOException
{
getMarshaller(object).readFrom(in, object);
}
/**
* Returns the marshaller for objects of this object's class, creating
* one if necessary.
*/
protected static synchronized Marshaller getMarshaller (Object object)
{
Class clazz = object.getClass();
Marshaller marsh = (Marshaller)_marshcache.get(clazz);
if (marsh == null) {
marsh = new Marshaller(clazz);
_marshcache.put(clazz, marsh);
}
return marsh;
}
/**
* Instantiate a marshaller for the specified class. Introspection is
* done during construct time to speed up subsequent marshalling and
* unmarshalling.
*/
protected Marshaller (Class clazz)
{
// we introspect on the class and cache the public data members
Field[] fields = clazz.getFields();
@@ -65,21 +105,21 @@ public class Marshaller
* Writes out all of the fields of the specified distributed object to
* the supplied data output stream.
*/
public void writeTo (DataOutputStream out, DObject dobj)
public void writeTo (DataOutputStream out, Object obj)
throws IOException
{
// we simply iterate over our marshallers, writing each field
// out in succession
for (int i = 0; i < _fields.length; i++) {
try {
_marshallers[i].writeTo(out, _fields[i], dobj);
_marshallers[i].writeTo(out, _fields[i], obj);
} catch (IllegalAccessException iae) {
// this shouldn't happen because we only attempt to marshall
// public fields, but we'll pass it on none the less
String errmsg = "Unable to marshall dobj field " +
String errmsg = "Unable to marshall obj field " +
"[field=" + _fields[i].getName() +
", dobj=" + dobj + "].";
", obj=" + obj + "].";
throw new ObjectStreamException(errmsg);
}
}
@@ -89,21 +129,21 @@ public class Marshaller
* Reads in all of the fields of the specified distributed object from
* the supplied data input stream.
*/
public void readFrom (DataInputStream in, DObject dobj)
public void readFrom (DataInputStream in, Object obj)
throws IOException
{
// we simply iterate over our marshallers, reading each field in
// in succession
for (int i = 0; i < _fields.length; i++) {
try {
_marshallers[i].readFrom(in, _fields[i], dobj);
_marshallers[i].readFrom(in, _fields[i], obj);
} catch (IllegalAccessException iae) {
// this shouldn't happen because we only attempt to
// unmarshall public fields, but we'll pass it on anyway
String errmsg = "Unable to unmarshall dobj field " +
String errmsg = "Unable to unmarshall obj field " +
"[field=" + _fields[i].getName() +
", dobj=" + dobj + "].";
", obj=" + obj + "].";
Log.logStackTrace(iae);
throw new ObjectStreamException(errmsg);
}
@@ -127,9 +167,16 @@ public class Marshaller
}
}
/** The fields that are marshalled by this marshaller. */
protected Field[] _fields;
/** The field marshallers that are used to marshall the fields. */
protected FieldMarshaller[] _marshallers;
/** A table of instantiated marshallers for our various marshalled
* classes. */
protected static HashMap _marshcache;
/** We use this to sort the fields into a predictable order. */
protected static final FieldComparator FIELD_COMP = new FieldComparator();
}
src/java/com/threerings/presents/io/OidListFieldMarshaller.java
+5 -6
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@@ -1,5 +1,5 @@
//
// $Id: OidListFieldMarshaller.java,v 1.2 2001/10/11 04:07:52 mdb Exp $
// $Id: OidListFieldMarshaller.java,v 1.3 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,7 +8,6 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
import com.threerings.presents.dobj.OidList;
public class OidListFieldMarshaller implements FieldMarshaller
@@ -16,10 +15,10 @@ public class OidListFieldMarshaller implements FieldMarshaller
/** This is the sort of field that we marshall. */
public OidList prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
OidList value = (OidList)field.get(dobj);
OidList value = (OidList)field.get(obj);
// we convert null oid lists to empty oid lists
if (value == null) {
value = new OidList();
@@ -27,11 +26,11 @@ public class OidListFieldMarshaller implements FieldMarshaller
value.writeTo(out);
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
OidList value = new OidList();
value.readFrom(in);
field.set(dobj, value);
field.set(obj, value);
}
}
src/java/com/threerings/presents/io/ShortFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: ShortFieldMarshaller.java,v 1.4 2001/10/11 04:07:52 mdb Exp $
// $Id: ShortFieldMarshaller.java,v 1.5 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,22 +8,20 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class ShortFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public short prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
out.writeShort(field.getShort(dobj));
out.writeShort(field.getShort(obj));
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.setShort(dobj, in.readShort());
field.setShort(obj, in.readShort());
}
}
src/java/com/threerings/presents/io/StreamableFieldMarshaller.java
+6 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: StreamableFieldMarshaller.java,v 1.1 2001/10/12 19:28:43 mdb Exp $
// $Id: StreamableFieldMarshaller.java,v 1.2 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,15 +8,14 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
import com.threerings.presents.io.Streamable;
public class StreamableFieldMarshaller implements FieldMarshaller
{
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
Streamable value = (Streamable)field.get(dobj);
Streamable value = (Streamable)field.get(obj);
// we freak out if our streamable is null
if (value == null) {
throw new IllegalAccessException(
@@ -25,7 +24,7 @@ public class StreamableFieldMarshaller implements FieldMarshaller
value.writeTo(out);
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
try {
@@ -34,11 +33,11 @@ public class StreamableFieldMarshaller implements FieldMarshaller
// unserialize it
value.readFrom(in);
// and set the value in the object
field.set(dobj, value);
field.set(obj, value);
} catch (InstantiationException ie) {
throw new IOException("Unable to instantiate streamable " +
"[field=" + field + ", object=" + dobj +
"[field=" + field + ", object=" + obj +
", error=" + ie + "]");
}
}
src/java/com/threerings/presents/io/StringArrayFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: StringArrayFieldMarshaller.java,v 1.2 2001/10/19 18:03:28 mdb Exp $
// $Id: StringArrayFieldMarshaller.java,v 1.3 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,17 +8,15 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class StringArrayFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public String[] prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
String[] value = (String[])field.get(dobj);
String[] value = (String[])field.get(obj);
// we convert null string arrays to zero length arrays
if (value == null) {
out.writeInt(0);
@@ -31,13 +29,13 @@ public class StringArrayFieldMarshaller implements FieldMarshaller
}
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
String[] value = new String[in.readInt()];
for (int i = 0; i < value.length; i++) {
value[i] = in.readUTF();
}
field.set(dobj, value);
field.set(obj, value);
}
}
src/java/com/threerings/presents/io/StringFieldMarshaller.java
+5 -7
View File
@@ -1,5 +1,5 @@
//
// $Id: StringFieldMarshaller.java,v 1.5 2001/10/11 04:07:52 mdb Exp $
// $Id: StringFieldMarshaller.java,v 1.6 2002/02/01 23:26:49 mdb Exp $
package com.threerings.presents.dobj.io;
@@ -8,17 +8,15 @@ import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import com.threerings.presents.dobj.DObject;
public class StringFieldMarshaller implements FieldMarshaller
{
/** This is the sort of field that we marshall. */
public String prototype;
public void writeTo (DataOutputStream out, Field field, DObject dobj)
public void writeTo (DataOutputStream out, Field field, Object obj)
throws IOException, IllegalAccessException
{
String value = (String)field.get(dobj);
String value = (String)field.get(obj);
// we convert null strings to empty strings
if (value == null) {
value = "";
@@ -26,9 +24,9 @@ public class StringFieldMarshaller implements FieldMarshaller
out.writeUTF(value);
}
public void readFrom (DataInputStream in, Field field, DObject dobj)
public void readFrom (DataInputStream in, Field field, Object obj)
throws IOException, IllegalAccessException
{
field.set(dobj, in.readUTF());
field.set(obj, in.readUTF());
}
}