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// Copyright 2016 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.packages;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.syntax.BaseFunction;
import com.google.devtools.build.lib.syntax.Environment;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.FuncallExpression;
import com.google.devtools.build.lib.syntax.FunctionSignature;
import com.google.devtools.build.lib.syntax.FunctionSignature.WithValues;
import com.google.devtools.build.lib.syntax.SkylarkType;
import com.google.devtools.build.lib.syntax.Type.ConversionException;
import java.util.Map;
import javax.annotation.Nullable;
/**
* A constructor for {@link SkylarkClassObject}.
*/
public final class SkylarkClassObjectConstructor extends BaseFunction {
/**
* "struct" function.
*/
public static final SkylarkClassObjectConstructor STRUCT =
new SkylarkClassObjectConstructor("struct");
private static final FunctionSignature.WithValues<Object, SkylarkType> SIGNATURE =
WithValues.create(FunctionSignature.KWARGS);
public SkylarkClassObjectConstructor(String name, Location location) {
super(name, SIGNATURE, location);
}
public SkylarkClassObjectConstructor(String name) {
this(name, Location.BUILTIN);
}
@Override
protected Object call(Object[] args, @Nullable FuncallExpression ast, @Nullable Environment env)
throws EvalException, ConversionException, InterruptedException {
@SuppressWarnings("unchecked")
Map<String, Object> kwargs = (Map<String, Object>) args[0];
return new SkylarkClassObject(this, kwargs, ast != null ? ast.getLocation() : Location.BUILTIN);
}
/**
* Creates a built-in class object (i.e. without creation loc). The errorMessage has to have
* exactly one '%s' parameter to substitute the field name.
*/
public SkylarkClassObject create(Map<String, Object> values, String message) {
return new SkylarkClassObject(this, values, message);
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
@Override
public boolean equals(@Nullable Object other) {
return other == this;
}
}
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