/*
* 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.codegen.when;
import org.jetbrains.annotations.
NotNull;
import org.jetbrains.kotlin.codegen.
ExpressionCodegen;
import org.jetbrains.kotlin.psi.
KtWhenExpression;
import org.jetbrains.kotlin.resolve.constants.
ConstantValue;
import org.jetbrains.kotlin.resolve.constants.
EnumValue;
import org.jetbrains.org.objectweb.asm.
Label;
import org.jetbrains.org.objectweb.asm.
Type;
public class
EnumSwitchCodegen extends
SwitchCodegen {
private final
WhenByEnumsMapping mapping;
public
EnumSwitchCodegen(
@
NotNull KtWhenExpression expression,
boolean
isStatement,
boolean
isExhaustive,
@
NotNull ExpressionCodegen codegen,
@
NotNull WhenByEnumsMapping mapping
) {
super(
expression,
isStatement,
isExhaustive,
codegen,
codegen.
getState().
getTypeMapper().
mapType(
mapping.
getEnumClassDescriptor()));
this.
mapping =
mapping;
}
@
Override
protected void
generateSubjectValueToIndex() {
codegen.
getState().
getMappingsClassesForWhenByEnum().
generateMappingsClassForExpression(
expression);
generateNullCheckIfNeeded();
v.
getstatic(
mapping.
getMappingsClassInternalName(),
mapping.
getFieldName(),
MappingClassesForWhenByEnumCodegen.
MAPPINGS_FIELD_DESCRIPTOR
);
v.
swap();
Type enumType =
codegen.
getState().
getTypeMapper().
mapClass(
mapping.
getEnumClassDescriptor());
v.
invokevirtual(
enumType.
getInternalName(), "ordinal",
Type.
getMethodDescriptor(
Type.
INT_TYPE), false);
v.
aload(
Type.
INT_TYPE);
}
@
Override
protected void
processConstant(@
NotNull ConstantValue<?>
constant, @
NotNull Label entryLabel) {
assert
constant instanceof
EnumValue : "guaranteed by usage contract";
putTransitionOnce(
mapping.
getIndexByEntry((
EnumValue)
constant),
entryLabel);
}
}