/*
* 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.jsio.rebind;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.JType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.jsio.client.JSOpaque;
import com.google.gwt.user.rebind.SourceWriter;
/**
* This doesn't include support for arrays, but merely provides an error
* message.
*/
class JSOpaqueFragmentGenerator extends FragmentGenerator {
@Override
boolean accepts(TypeOracle oracle, JType type) {
JClassType asClass = type.isClassOrInterface();
if (asClass == null) {
return false;
}
return isAssignable(oracle, asClass, JSOpaque.class);
}
@Override
void fromJS(FragmentGeneratorContext context)
throws UnableToCompleteException {
logError(context.parentLogger);
}
@Override
void toJS(FragmentGeneratorContext context) throws UnableToCompleteException {
context.parentLogger.branch(TreeLogger.DEBUG,
"Building string value setter statement", null);
SourceWriter sw = context.sw;
sw.print("eval(");
sw.print(context.parameterName);
sw.print(".@com.google.gwt.jsio.client.JSOpaque::reference)");
}
@Override
void writeExtractorJSNIReference(FragmentGeneratorContext context)
throws UnableToCompleteException {
SourceWriter sw = context.sw;
sw.print("@com.google.gwt.jsio.client.impl.JSONWrapperUtil::JSOPAQUE_EXTRACTOR");
}
private void logError(TreeLogger logger) throws UnableToCompleteException {
logger.branch(TreeLogger.ERROR, "JSOpaque objects may only be passed into"
+ " a JS API.", null);
throw new UnableToCompleteException();
}
}