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#ifndef _QmfEngineQueryImpl_
#define _QmfEngineQueryImpl_
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
#include "qmf/engine/Query.h"
#include "qmf/engine/Schema.h"
#include <string>
#include <boost/shared_ptr.hpp>
namespace qpid {
namespace framing {
class Buffer;
}
}
namespace qmf {
namespace engine {
struct QueryElementImpl {
QueryElementImpl(const std::string& a, const Value* v, ValueOper o) : attrName(a), value(v), oper(o) {}
~QueryElementImpl() {}
bool evaluate(const Object* object) const;
std::string attrName;
const Value* value;
ValueOper oper;
};
struct QueryExpressionImpl {
QueryExpressionImpl(ExprOper o, const QueryOperand* operand1, const QueryOperand* operand2) : oper(o), left(operand1), right(operand2) {}
~QueryExpressionImpl() {}
bool evaluate(const Object* object) const;
ExprOper oper;
const QueryOperand* left;
const QueryOperand* right;
};
struct QueryImpl {
// Constructors mapped to public
QueryImpl(const std::string& c, const std::string& p) : packageName(p), className(c), select(0), resultLimit(0) {}
QueryImpl(const SchemaClassKey* key) : packageName(key->getPackageName()), className(key->getClassName()), select(0), resultLimit(0) {}
QueryImpl(const ObjectId* oid) : oid(new ObjectId(*oid)), select(0), resultLimit(0) {}
// Factory constructors
QueryImpl(qpid::framing::Buffer& buffer);
~QueryImpl() {};
static Query* factory(qpid::framing::Buffer& buffer);
void setSelect(const QueryOperand* criterion) { select = criterion; }
void setLimit(uint32_t maxResults) { resultLimit = maxResults; }
void setOrderBy(const std::string& attrName, bool decreasing) {
orderBy = attrName; orderDecreasing = decreasing;
}
const std::string& getPackage() const { return packageName; }
const std::string& getClass() const { return className; }
const ObjectId* getObjectId() const { return oid.get(); }
bool haveSelect() const { return select != 0; }
bool haveLimit() const { return resultLimit > 0; }
bool haveOrderBy() const { return !orderBy.empty(); }
const QueryOperand* getSelect() const { return select; }
uint32_t getLimit() const { return resultLimit; }
const std::string& getOrderBy() const { return orderBy; }
bool getDecreasing() const { return orderDecreasing; }
void encode(qpid::framing::Buffer& buffer) const;
bool singleAgent() const { return oid.get() != 0; }
uint32_t agentBank() const { return singleAgent() ? oid->getAgentBank() : 0; }
std::string packageName;
std::string className;
boost::shared_ptr<ObjectId> oid;
const QueryOperand* select;
uint32_t resultLimit;
std::string orderBy;
bool orderDecreasing;
};
}
}
#endif
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