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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.yql;
import com.google.common.base.Preconditions;
import java.util.List;
class JavaListTypeChecker extends OperatorTypeChecker {
private final Class<?> elementType;
public JavaListTypeChecker(Operator parent, int idx, Class<?> elementType) {
super(parent, idx);
this.elementType = elementType;
}
@Override
public void check(Object argument) {
Preconditions.checkNotNull(argument, "Argument %s of %s must not be null", idx, parent);
Preconditions.checkArgument(argument instanceof List, "Argument %s of %s must be a List<%s>", idx, parent, elementType.getName(), argument.getClass().getName());
List<?> lst = (List<?>) argument;
for (Object elt : lst) {
Preconditions.checkNotNull(elt, "Argument %s of %s List elements may not be null", idx, parent);
Preconditions.checkArgument(elementType.isInstance(elt), "Argument %s of %s List elements must be %s (is %s)", idx, parent, elementType.getName(), elt.getClass().getName());
}
}
}
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