/*
* 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.user.rebind.SourceWriter;
/**
* Encapsulates accessors for boxed primitive values.
*/
class BoxedTypeFragmentGenerator extends FragmentGenerator {
@Override
boolean accepts(TypeOracle typeOracle, JType type) {
JClassType asClass = type.isClass();
if (asClass == null) {
return false;
}
return isAssignable(typeOracle, asClass, Boolean.class)
|| isAssignable(typeOracle, asClass, Character.class)
|| isAssignable(typeOracle, asClass, Number.class);
}
@Override
String defaultValue(TypeOracle typeOracle, JType type)
throws UnableToCompleteException {
JClassType returnType = type.isClassOrInterface();
if (isAssignable(typeOracle, returnType, Boolean.class)) {
return "false";
} else if (isAssignable(typeOracle, returnType, Character.class)) {
return "32";
} else if (isAssignable(typeOracle, returnType, Number.class)) {
return "0";
}
throw new UnableToCompleteException();
}
@Override
void fromJS(FragmentGeneratorContext context)
throws UnableToCompleteException {
TreeLogger logger = context.parentLogger.branch(TreeLogger.DEBUG,
"Building value getter statement", null);
SourceWriter sw = context.sw;
TypeOracle typeOracle = context.typeOracle;
JClassType returnType = context.returnType.isClassOrInterface();
// Don't use "x || null" expression because the value may be boolean false
sw.print("(");
sw.print(context.parameterName);
sw.print(" == null || ");
sw.print(context.parameterName);
sw.print(" == undefined) ? null : ");
sw.print("@com.google.gwt.jsio.client.impl.JSONWrapperUtil::createWrapper");
// Just plow through the Boxed types
if (isAssignable(typeOracle, returnType, Boolean.class)) {
sw.print("(Z)(");
} else if (isAssignable(typeOracle, returnType, Byte.class)) {
sw.print("(B)(");
} else if (isAssignable(typeOracle, returnType, Character.class)) {
sw.print("(C)(");
} else if (isAssignable(typeOracle, returnType, Double.class)) {
sw.print("(D)(");
} else if (isAssignable(typeOracle, returnType, Float.class)) {
sw.print("(F)(");
} else if (isAssignable(typeOracle, returnType, Integer.class)) {
sw.print("(I)(");
} else if (isAssignable(typeOracle, returnType, Long.class)) {
sw.print("(J)(");
} else if (isAssignable(typeOracle, returnType, Short.class)) {
sw.print("(S)(");
} else {
logger.log(TreeLogger.ERROR, "Unknown boxed type "
+ returnType.getQualifiedSourceName(), null);
throw new UnableToCompleteException();
}
sw.print(context.parameterName);
sw.print(")");
}
@Override
void toJS(FragmentGeneratorContext context) throws UnableToCompleteException {
context.parentLogger.branch(TreeLogger.DEBUG,
"Building boxed value setter statement", null);
SourceWriter sw = context.sw;
JClassType returnType = context.returnType.isClassOrInterface();
sw.print(context.parameterName);
if (isAssignable(context.typeOracle, returnType, Boolean.class)) {
sw.print(".@java.lang.Boolean::booleanValue()()");
} else if (isAssignable(context.typeOracle, returnType, Character.class)) {
sw.print(".@java.lang.Character::charValue()()");
} else {
sw.print(".@java.lang.Number::doubleValue()()");
}
}
@Override
void writeExtractorJSNIReference(FragmentGeneratorContext context) {
SourceWriter sw = context.sw;
sw.print("@com.google.gwt.jsio.client.impl.JSONWrapperUtil::");
sw.print(context.returnType.getSimpleSourceName().toUpperCase());
sw.print("_EXTRACTOR");
}
}