org.jetbrains.kotlin.load.java.structure.impl.JavaPropertyInitializerEvaluatorImpl.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 org.jetbrains.kotlin.load.java.structure.impl
import com.intellij.psi.impl.JavaConstantExpressionEvaluator
import com.intellij.psi.util.PsiUtil
import org.jetbrains.kotlin.descriptors.PropertyDescriptor
import org.jetbrains.kotlin.load.java.structure.JavaField
import org.jetbrains.kotlin.load.java.structure.JavaPropertyInitializerEvaluator
import org.jetbrains.kotlin.resolve.constants.ConstantValue
import org.jetbrains.kotlin.resolve.constants.ConstantValueFactory
import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
public class JavaPropertyInitializerEvaluatorImpl : JavaPropertyInitializerEvaluator {
override fun getInitializerConstant(field: JavaField, descriptor: PropertyDescriptor): ConstantValue<*>? {
val initializer = (field as JavaFieldImpl).getInitializer()
val evaluated = JavaConstantExpressionEvaluator.computeConstantExpression(initializer, false) ?: return null
val factory = ConstantValueFactory(descriptor.builtIns)
when (evaluated) {
//Note: evaluated expression may be of class that does not match field type in some cases
// tested for Int, left other checks just in case
is Byte, is Short, is Int, is Long -> {
return factory.createIntegerConstantValue((evaluated as Number).toLong(), descriptor.getType())
}
else -> {
return factory.createConstantValue(evaluated)
}
}
}
override fun isNotNullCompileTimeConstant(field: JavaField): Boolean {
// PsiUtil.isCompileTimeConstant returns false for null-initialized fields,
// see com.intellij.psi.util.IsConstantExpressionVisitor.visitLiteralExpression()
return PsiUtil.isCompileTimeConstant((field as JavaFieldImpl).getPsi())
}
}