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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "modifiers.h"
#include "grouping.h"
#include <vespa/searchlib/expression/multiargfunctionnode.h>
#include <vespa/searchlib/expression/attributenode.h>
#include <vespa/searchlib/expression/attribute_map_lookup_node.h>
#include <vespa/searchlib/expression/documentfieldnode.h>
using namespace search::expression;
namespace search::aggregation {
bool
AttributeNodeReplacer::check(const vespalib::Identifiable &obj) const
{
return obj.getClass().inherits(GroupingLevel::classId) || obj.getClass().inherits(AggregationResult::classId) || obj.getClass().inherits(MultiArgFunctionNode::classId);
}
void
AttributeNodeReplacer::execute(vespalib::Identifiable &obj)
{
if (obj.getClass().inherits(GroupingLevel::classId)) {
GroupingLevel & g(static_cast<GroupingLevel &>(obj));
if (g.getExpression().getRoot()->inherits(AttributeNode::classId)) {
auto replacementNode = getReplacementNode(static_cast<const AttributeNode &>(*g.getExpression().getRoot()));
if (replacementNode) {
g.setExpression(std::move(replacementNode));
}
} else {
g.getExpression().getRoot()->select(*this, *this);
}
g.groupPrototype().select(*this, *this);
} else if(obj.getClass().inherits(AggregationResult::classId)) {
AggregationResult & a(static_cast<AggregationResult &>(obj));
ExpressionNode * e(a.getExpression());
if (e) {
if (e->inherits(AttributeNode::classId)) {
auto replacementNode = getReplacementNode(static_cast<const AttributeNode &>(*e));
if (replacementNode) {
a.setExpression(std::move(replacementNode));
}
} else {
e->select(*this, *this);
}
}
} else if(obj.getClass().inherits(MultiArgFunctionNode::classId)) {
MultiArgFunctionNode::ExpressionNodeVector & v(static_cast<MultiArgFunctionNode &>(obj).expressionNodeVector());
for(size_t i(0), m(v.size()); i < m; i++) {
ExpressionNode::CP & e(v[i]);
if (e->inherits(AttributeNode::classId)) {
auto replacementNode = getReplacementNode(static_cast<const AttributeNode &>(*e));
if (replacementNode) {
e = std::move(replacementNode);
}
} else {
e->select(*this, *this);
}
}
}
}
std::unique_ptr<ExpressionNode>
Attribute2DocumentAccessor::getReplacementNode(const AttributeNode &attributeNode)
{
return std::make_unique<DocumentFieldNode>(attributeNode.getAttributeName());
}
}
// this function was added by ../../forcelink.sh
void forcelink_file_searchlib_aggregation_modifiers() {}
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