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#ifndef _QmfQuery_
#define _QmfQuery_
/*
* 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/ObjectId.h>
#include <qmf/Value.h>
namespace qmf {
struct Object;
struct QueryElementImpl;
struct QueryImpl;
struct QueryExpressionImpl;
struct SchemaClassKey;
enum ValueOper {
O_EQ = 1,
O_NE = 2,
O_LT = 3,
O_LE = 4,
O_GT = 5,
O_GE = 6,
O_RE_MATCH = 7,
O_RE_NOMATCH = 8
};
struct QueryOperand {
virtual ~QueryOperand() {}
virtual bool evaluate(const Object* object) const = 0;
};
struct QueryElement : public QueryOperand {
QueryElement(const char* attrName, const Value* value, ValueOper oper);
QueryElement(QueryElementImpl* impl);
virtual ~QueryElement();
bool evaluate(const Object* object) const;
QueryElementImpl* impl;
};
enum ExprOper {
E_NOT = 1,
E_AND = 2,
E_OR = 3,
E_XOR = 4
};
struct QueryExpression : public QueryOperand {
QueryExpression(ExprOper oper, const QueryOperand* operand1, const QueryOperand* operand2);
QueryExpression(QueryExpressionImpl* impl);
virtual ~QueryExpression();
bool evaluate(const Object* object) const;
QueryExpressionImpl* impl;
};
class Query {
public:
Query(const char* className, const char* packageName);
Query(const SchemaClassKey* key);
Query(const ObjectId* oid);
Query(QueryImpl* impl);
~Query();
void setSelect(const QueryOperand* criterion);
void setLimit(uint32_t maxResults);
void setOrderBy(const char* attrName, bool decreasing);
const char* getPackage() const;
const char* getClass() const;
const ObjectId* getObjectId() const;
bool haveSelect() const;
bool haveLimit() const;
bool haveOrderBy() const;
const QueryOperand* getSelect() const;
uint32_t getLimit() const;
const char* getOrderBy() const;
bool getDecreasing() const;
QueryImpl* impl;
};
}
#endif
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