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git-svn-id: http://svn.opennebula.org/one/trunk@230 3034c82b-c49b-4eb3-8279-a7acafdc01c0
238 lines
6.0 KiB
C++
238 lines
6.0 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2008, Distributed Systems Architecture Group, Universidad */
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/* Complutense de Madrid (dsa-research.org) */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef ATTRIBUTE_H_
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#define ATTRIBUTE_H_
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#include <string>
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#include <map>
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#include <sstream>
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#include <algorithm>
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using namespace std;
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/**
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* Attribute base class for name-value pairs. This class provides a generic
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* interface to implement
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*/
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class Attribute
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{
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public:
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Attribute(const string& aname):attribute_name(aname)
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{
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transform (
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attribute_name.begin(),
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attribute_name.end(),
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attribute_name.begin(),
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(int(*)(int))toupper);
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};
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Attribute(const char * aname)
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{
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ostringstream name;
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name << uppercase << aname;
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attribute_name = name.str();
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};
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virtual ~Attribute(){};
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enum AttributeType
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{
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SIMPLE = 0,
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VECTOR = 1
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};
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/**
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* Gets the name of the attribute.
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* @return the attribute name
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*/
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const string& name() const
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{
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return attribute_name;
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};
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/**
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* Marshall the attribute in a single string. The string MUST be freed
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* by the calling function.
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* @return a string (allocated in the heap) holding the attribute value.
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*/
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virtual string * marshall() = 0;
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/**
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* Builds a new attribute from a string.
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*/
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virtual void unmarshall(const string& sattr) = 0;
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/**
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* Returns the attribute type
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*/
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virtual AttributeType type() = 0;
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private:
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/**
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* The attribute name.
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*/
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string attribute_name;
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};
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/**
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* The SingleAttribute class represents a simple attribute in the form
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* NAME = VALUE.
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*/
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class SingleAttribute : public Attribute
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{
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public:
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SingleAttribute(const string& name):Attribute(name){};
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SingleAttribute(const string& name, const string& value):
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Attribute(name),attribute_value(value){};
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SingleAttribute(const char * name, const string& value):
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Attribute(name),attribute_value(value){};
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~SingleAttribute(){};
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/**
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* Returns the attribute value, a string.
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*/
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const string& value() const
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{
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return attribute_value;
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};
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/**
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* Marshall the attribute in a single string. The string MUST be freed
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* by the calling function.
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* @return a string (allocated in the heap) holding the attribute value.
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*/
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string * marshall()
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{
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string * rs = new string;
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*rs = attribute_value;
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return rs;
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};
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/**
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* Builds a new attribute from a string.
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*/
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void unmarshall(const string& sattr)
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{
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attribute_value = sattr;
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};
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/**
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* Replaces the attribute value from a string.
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*/
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void replace(const string& sattr)
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{
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attribute_value = sattr;
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};
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/**
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* Returns the attribute type
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*/
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AttributeType type()
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{
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return SIMPLE;
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};
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private:
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string attribute_value;
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};
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/**
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* The VectorAttribute class represents an array attribute in the form
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* NAME = [ VAL_NAME_1=VAL_VALUE_1,...,VAL_NAME_N=VAL_VALUE_N].
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*/
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class VectorAttribute : public Attribute
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{
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public:
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VectorAttribute(const string& name):Attribute(name){};
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VectorAttribute(const string& name,const map<string,string>& value):
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Attribute(name),attribute_value(value){};
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~VectorAttribute(){};
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/**
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* Returns the attribute value, a string.
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*/
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const map<string,string>& value() const
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{
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return attribute_value;
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};
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/**
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*
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*/
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string vector_value(const char *name) const;
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/**
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* Marshall the attribute in a single string. The string MUST be freed
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* by the calling function. The string is in the form:
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* "VAL_NAME_1=VAL_VALUE_1,...,VAL_NAME_N=VAL_VALUE_N".
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* @return a string (allocated in the heap) holding the attribute value.
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*/
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string * marshall();
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/**
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* Builds a new attribute from a string of the form:
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* "VAL_NAME_1=VAL_VALUE_1,...,VAL_NAME_N=VAL_VALUE_N".
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*/
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void unmarshall(const string& sattr);
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/**
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* Replace the value of the given attribute with the provided map
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*/
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void replace(const map<string,string>& attr);
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/**
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* Returns the attribute type
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*/
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AttributeType type()
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{
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return VECTOR;
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};
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private:
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static const char * magic_sep;
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static const int magic_sep_size;
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map<string,string> attribute_value;
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};
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#endif /*ATTRIBUTE_H_*/
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