org.jetbrains.kotlin.codegen.when.EnumSwitchCodegen 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.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);
this.mapping = mapping;
}
@Override
protected void generateSubject() {
codegen.getState().getMappingsClassesForWhenByEnum().generateMappingsClassForExpression(expression);
super.generateSubject();
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);
}
}