sysstatemgmt/systemstatemgr/ssm/src/ssmswppolicymap.cpp
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     1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 //
       
    15 
       
    16 #include "ssmdebug.h"
       
    17 #include "ssmswppolicymap.h"
       
    18 
       
    19 
       
    20 //
       
    21 // The CSsmSwpPolicyMapping implementation
       
    22 //
       
    23 
       
    24 // Construction/destruction
       
    25 	
       
    26 /**
       
    27 Create a mapping from an swp and a file name
       
    28 
       
    29 @param aSwpKey The swp key to set 
       
    30 @param aFilename The file name associated with this swp key
       
    31 @return A new CSsmSwpPolicyMapping containing the swp and file name
       
    32 */
       
    33 CSsmSwpPolicyMapping* CSsmSwpPolicyMapping::NewLC(TUint aSwpKey, const TDesC& aFilename)
       
    34 	{
       
    35 	CSsmSwpPolicyMapping* self = new (ELeave) CSsmSwpPolicyMapping(aSwpKey);
       
    36 	CleanupStack::PushL(self);
       
    37 	self->ConstructL(aFilename);
       
    38 	return self;
       
    39 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
    40 
       
    41 /**
       
    42 Construct a mapping onbject
       
    43 
       
    44 @param aSwpKey swp key to set 
       
    45 
       
    46 */
       
    47 CSsmSwpPolicyMapping::CSsmSwpPolicyMapping(TUint aSwpKey) :
       
    48 	iSwpKey(aSwpKey)
       
    49 	{
       
    50 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
    51 
       
    52 /**
       
    53 Set file on a constructed object
       
    54 
       
    55 @param aFile File name to set 
       
    56 */
       
    57 void CSsmSwpPolicyMapping::ConstructL(const TDesC& aFilename)
       
    58 	{
       
    59 	iFilename = aFilename.AllocL();
       
    60 	}
       
    61 
       
    62 /**
       
    63 Trivial destructor
       
    64 */
       
    65 CSsmSwpPolicyMapping::~CSsmSwpPolicyMapping()
       
    66 	{
       
    67 	delete iFilename;
       
    68 	}
       
    69 
       
    70 // Accessors
       
    71 
       
    72 /**
       
    73 Retrieve this mapping's swp key
       
    74 
       
    75 @return An swp key
       
    76 */
       
    77 TUint CSsmSwpPolicyMapping::SwpKey() const
       
    78 	{
       
    79 	return iSwpKey;
       
    80 	}
       
    81 
       
    82 /**
       
    83 Retrieve this mapping's file name
       
    84 
       
    85 @return A reference to a descriptor containing the file name
       
    86 */
       
    87 const TDesC& CSsmSwpPolicyMapping::Filename() const
       
    88 	{
       
    89 	return *iFilename;
       
    90 	}
       
    91  
       
    92 /**
       
    93 Method for comparing two mappings.
       
    94 Used by the map's sort and search functions
       
    95 */
       
    96 TInt CSsmSwpPolicyMapping::CompareBySwp(const CSsmSwpPolicyMapping& aFirst, const CSsmSwpPolicyMapping& aSecond)
       
    97 	{
       
    98 	return aFirst.SwpKey() - aSecond.SwpKey();
       
    99 	}
       
   100 
       
   101 /**
       
   102 This linear order encapsulates the function used for sorting mappings by their swp as
       
   103 well as determining equivalence when searching
       
   104 
       
   105 @see TLinearOrder
       
   106 */
       
   107 	
       
   108 static TLinearOrder<CSsmSwpPolicyMapping> bySwp( CSsmSwpPolicyMapping::CompareBySwp );
       
   109 
       
   110 
       
   111 //
       
   112 // The CSsmSwpPolicyMap implementation
       
   113 //
       
   114 
       
   115 // Construction/destruction
       
   116 
       
   117 /**
       
   118 Trivial factory methods
       
   119 */
       
   120 CSsmSwpPolicyMap* CSsmSwpPolicyMap::NewLC()
       
   121 	{
       
   122 	CSsmSwpPolicyMap* self = new (ELeave) CSsmSwpPolicyMap();
       
   123 	CleanupStack::PushL(self);
       
   124 	return self;
       
   125 	}
       
   126 
       
   127 CSsmSwpPolicyMap* CSsmSwpPolicyMap::NewL()
       
   128 	{
       
   129 	CSsmSwpPolicyMap* self = NewLC();
       
   130 	CleanupStack::Pop(self);
       
   131 	return self;
       
   132 	}
       
   133 
       
   134 CSsmSwpPolicyMap::CSsmSwpPolicyMap()
       
   135 	{
       
   136 	}
       
   137 
       
   138 /**
       
   139 Destroy item list
       
   140 */
       
   141 CSsmSwpPolicyMap::~CSsmSwpPolicyMap()
       
   142 	{
       
   143 	iItems.ResetAndDestroy();
       
   144 	}
       
   145 
       
   146 /**
       
   147 Add a mapping to the mapping list
       
   148 After this call, the map owns the mapping and the API user must pop the mapping 
       
   149 from the cleanup stack
       
   150 
       
   151 @param aSwpKey The swp key to set 
       
   152 @param aFilename The file name to be associated with this swp key
       
   153 @leave KErrAlreadyExists if this swp key is already in the list
       
   154 
       
   155 */
       
   156 void CSsmSwpPolicyMap::AddL(TUint aSwpKey, const TDesC& aFilename)
       
   157 	{
       
   158 	CSsmSwpPolicyMapping* mapping = CSsmSwpPolicyMapping::NewLC(aSwpKey, aFilename);
       
   159 	iItems.InsertInOrderL(mapping, bySwp);
       
   160 	CleanupStack::Pop(mapping);
       
   161 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
   162 
       
   163 /**
       
   164  * Delete a mapping from the mapping list
       
   165  * After this call the mapping corresponding to the key is deleted 
       
   166  * @param aSwpKey The swp key to be deleted
       
   167  * @leave KErrNotFound if this swp key is not present in the list
       
   168 */
       
   169 #ifdef _DEBUG
       
   170 void CSsmSwpPolicyMap::DeleteSwpMapL(TUint aSwpKey)
       
   171 	{
       
   172 	CSsmSwpPolicyMapping* mapping = CSsmSwpPolicyMapping::NewLC(aSwpKey, KNullDesC);
       
   173 	TInt mappingarrayindex = iItems.FindInOrderL(mapping, bySwp);
       
   174 	CleanupStack::PopAndDestroy(mapping);
       
   175 	CSsmSwpPolicyMapping* found = iItems[mappingarrayindex];
       
   176 	delete found;
       
   177 	iItems.Remove(mappingarrayindex);
       
   178 	iItems.Compress();
       
   179 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
   180 #endif
       
   181 
       
   182 /**
       
   183 Find a file name for the supplied swp
       
   184 @param aSwpKey The swp key to search for in the mapping
       
   185 @return A descriptor containing the file name associated with the swp
       
   186 @leave KErrNotFound if there is no item matching this swp
       
   187 
       
   188 */
       
   189 const TDesC& CSsmSwpPolicyMap::FilenameL(TUint aSwpKey) const
       
   190 	{
       
   191 	const CSsmSwpPolicyMapping* found = MappingL(aSwpKey);
       
   192 	return found->Filename();
       
   193 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
   194 
       
   195 
       
   196 /**
       
   197 Find a mapping object for the supplied swp
       
   198 @param aSwp The swp key to search for
       
   199 @return The mapping object corresponding to the swp
       
   200 @leave KErrNotFound if there is no item matching this swp
       
   201 
       
   202 */
       
   203 const CSsmSwpPolicyMapping* CSsmSwpPolicyMap::MappingL(TUint aSwpKey) const
       
   204 	{
       
   205 	CSsmSwpPolicyMapping* search = CSsmSwpPolicyMapping::NewLC(aSwpKey, KNullDesC);
       
   206 	TInt pos = iItems.FindInOrderL(search, bySwp);
       
   207 	CleanupStack::PopAndDestroy(search);
       
   208 	const CSsmSwpPolicyMapping* const& found = iItems[pos];
       
   209 	return found;
       
   210 	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
       
   211 
       
   212