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Diffstat (limited to 'qpid/cpp/src/qmf/engine/QueryImpl.h')
-rw-r--r-- | qpid/cpp/src/qmf/engine/QueryImpl.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/qpid/cpp/src/qmf/engine/QueryImpl.h b/qpid/cpp/src/qmf/engine/QueryImpl.h new file mode 100644 index 0000000000..8ebe0d932f --- /dev/null +++ b/qpid/cpp/src/qmf/engine/QueryImpl.h @@ -0,0 +1,102 @@ +#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 |