| /* |
| * 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.GwtScriptOnly; |
| import com.google.gwt.core.client.JavaScriptObject; |
| import com.google.gwt.core.client.JsonUtils; |
| import com.google.gwt.core.client.UnsafeNativeLong; |
| import com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException; |
| import com.google.gwt.user.client.rpc.SerializationException; |
| |
| /** |
| * The web-mode only version of ClientSerializationStreamReader. Any changes to this class to deal |
| * with protocol changes must also be applied to the devmode version of |
| * ClientSerializationStreamReader. |
| */ |
| @GwtScriptOnly |
| 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 { |
| |
| /* |
| * Need to read the version from the string since version is later set in |
| * super.prepareToRead() from the evaluated payload but that is too late. |
| */ |
| if (readVersion(encoded) < SERIALIZATION_STREAM_JSON_VERSION) { |
| // Versions prior to 8 uses almost JSON with Javascript is special cases; e.g., using ].concat([, |
| // non-stringified NaN/Infinity or ''+'' concatenated strings. |
| results = eval(encoded); |
| } else { |
| results = JsonUtils.safeEval(encoded); |
| } |
| |
| index = getLength(results); |
| super.prepareToRead(encoded); |
| |
| if (getVersion() < SERIALIZATION_STREAM_MIN_VERSION |
| || getVersion() > SERIALIZATION_STREAM_MAX_VERSION) { |
| throw new IncompatibleRemoteServiceException("Got version " + getVersion() |
| + ", expected version between " + SERIALIZATION_STREAM_MIN_VERSION + " and " |
| + SERIALIZATION_STREAM_MAX_VERSION); |
| } |
| |
| if (!areFlagsValid()) { |
| throw new IncompatibleRemoteServiceException("Got an unknown flag from " |
| + "server: " + getFlags()); |
| } |
| |
| 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 Number(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 Number(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 @ClientSerializationStreamReader::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]; |
| }-*/; |
| |
| private static int readVersion(String encodedString) { |
| String versionStr = |
| encodedString.substring(encodedString.lastIndexOf(",") + 1, encodedString.lastIndexOf("]")); |
| int pos = versionStr.lastIndexOf("["); |
| if (pos >= 0) { |
| versionStr = versionStr.substring(pos + 1); |
| } |
| return Integer.parseInt(versionStr.trim()); |
| } |
| |
| } |