/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.user.client.rpc.impl;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.UnsafeNativeLong;
import com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException;
import com.google.gwt.user.client.rpc.SerializationException;
/**
* For internal use only. Used for server call serialization.
*/
public final class ClientSerializationStreamReader extends
AbstractSerializationStreamReader {
private static native JavaScriptObject eval(String encoded) /*-{
return eval(encoded);
}-*/;
private static native int getLength(JavaScriptObject array) /*-{
return array.length;
}-*/;
int index;
JavaScriptObject results;
JavaScriptObject stringTable;
private Serializer serializer;
public ClientSerializationStreamReader(Serializer serializer) {
this.serializer = serializer;
}
@Override
public void prepareToRead(String encoded) throws SerializationException {
results = eval(encoded);
index = getLength(results);
super.prepareToRead(encoded);
if (getVersion() != SERIALIZATION_STREAM_VERSION) {
throw new IncompatibleRemoteServiceException("Expecting version "
+ SERIALIZATION_STREAM_VERSION + " from server, got " + getVersion()
+ ".");
}
stringTable = readJavaScriptObject();
}
public native boolean readBoolean() /*-{
return !!this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public native byte readByte() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public native char readChar() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public native double readDouble() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public native float readFloat() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public native int readInt() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
@UnsafeNativeLong
public native long readLong() /*-{
var s = this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
return @com.google.gwt.lang.LongLib::longFromBase64(Ljava/lang/String;)(s);
}-*/;
public native short readShort() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
public String readString() {
return getString(readInt());
}
@Override
protected Object deserialize(String typeSignature)
throws SerializationException {
int id = reserveDecodedObjectIndex();
Object instance = serializer.instantiate(this, typeSignature);
rememberDecodedObject(id, instance);
serializer.deserialize(this, instance, typeSignature);
return instance;
}
@Override
protected native String getString(int index) /*-{
// index is 1-based
return index > 0 ? this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::stringTable[index - 1] : null;
}-*/;
private native JavaScriptObject readJavaScriptObject() /*-{
return this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::results[--this.@com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader::index];
}-*/;
}