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ReferenceConstructorExpr.java
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ReferenceConstructorExpr.java
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// Copyright 2020 Google LLC
//
// 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.api.generator.engine.ast;
import com.google.auto.value.AutoValue;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
@AutoValue
public abstract class ReferenceConstructorExpr implements Expr {
public enum KeywordKind {
THIS,
SUPER
}
@Override
public abstract TypeNode type();
public abstract KeywordKind keywordKind();
public abstract ImmutableList<Expr> arguments();
@Override
public void accept(AstNodeVisitor visitor) {
visitor.visit(this);
}
public static Builder thisBuilder() {
return new AutoValue_ReferenceConstructorExpr.Builder()
.setArguments(Collections.emptyList())
.setKeywordKind(KeywordKind.THIS);
}
public static Builder superBuilder() {
return new AutoValue_ReferenceConstructorExpr.Builder()
.setArguments(Collections.emptyList())
.setKeywordKind(KeywordKind.SUPER);
}
@AutoValue.Builder
public abstract static class Builder {
public abstract Builder setType(TypeNode node);
public Builder setArguments(Expr... arguments) {
return setArguments(Arrays.asList(arguments));
}
public abstract Builder setArguments(List<Expr> arguments);
// private.
abstract Builder setKeywordKind(KeywordKind keywordKind);
abstract TypeNode type();
abstract ImmutableList<Expr> arguments();
abstract ReferenceConstructorExpr autoBuild();
public ReferenceConstructorExpr build() {
ReferenceConstructorExpr referenceConstructorExpr = autoBuild();
Preconditions.checkState(
TypeNode.isReferenceType(referenceConstructorExpr.type()),
"A this/super constructor must have a reference type.");
NodeValidator.checkNoNullElements(
arguments(), "the \"this\" or \"super\" initialization", type().reference().name());
return referenceConstructorExpr;
}
}
}