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/*
 * 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.resolve.calls.model;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.psi.KtExpression;
import org.jetbrains.kotlin.psi.ValueArgument;

import java.util.Collections;
import java.util.List;

public class ExpressionValueArgument implements ResolvedValueArgument {
    private final ValueArgument valueArgument;

    public ExpressionValueArgument(@Nullable ValueArgument valueArgument) {
        this.valueArgument = valueArgument;
    }

    // Nullable when something like f(a, , b) was in the source code
    @Nullable
    public ValueArgument getValueArgument() {
        return valueArgument;
    }

    @NotNull
    @Override
    public List getArguments() {
        if (valueArgument == null) return Collections.emptyList();
        return Collections.singletonList(valueArgument);
    }

    @Override
    public String toString() {
        KtExpression expression = valueArgument.getArgumentExpression();
        return expression == null ? "no expression" : expression.getText();
    }
}