Examples of org.datanucleus.ClassLoaderResolver

org.datanucleus.ClassLoaderResolver
Class to allow resolution and loading of classes in a persistence framework. Implementations are to define the rules for resolving the classes. For example JDO (used outside a J2EE container) would likely differ from EJB3 (used within a J2EE container). The search class path order is:
- the primary classloader argument
- the primary classloader (set using setPrimary and kept in ThreadLocal variable).
- the current thread context classloader.
- the pm classloader.
- the registered classloader.
- the user registered classloader.
@version $Revision: 1.10 $

     * @param parameterValues The parameter values (if any)
     * @param candidateCmd Meta-data for the candidate class
     */
    protected void compileQueryDelete(Map parameterValues, AbstractClassMetaData candidateCmd)
    {
        ClassLoaderResolver clr = ec.getClassLoaderResolver();
        HashSet<String> subclassNames = 
            ec.getStoreManager().getSubClassesForClass(candidateCmd.getFullClassName(), true, clr);
        if (subclassNames != null && !subclassNames.isEmpty())
        {
            // Check for subclasses having their own tables and hence needing multiple DELETEs

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     */
    protected SQLStatement getSQLStatementForGet(ObjectProvider ownerSM)
    {
        SQLStatement sqlStmt = null;


        final ClassLoaderResolver clr = ownerSM.getExecutionContext().getClassLoaderResolver();
        final Class valueCls = clr.classForName(this.valueType);
        RDBMSStoreManager storeMgr = (RDBMSStoreManager)this.storeMgr;
        if (ownerMemberMetaData.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE)
        {
            getMappingDef = new StatementClassMapping();
            if (valueTable.getDiscriminatorMetaData() != null &&
                valueTable.getDiscriminatorMetaData().getStrategy() != DiscriminatorStrategy.NONE)
            {
                // Value class has discriminator
                if (ClassUtils.isReferenceType(valueCls))
                {
                    String[] clsNames =
                        storeMgr.getNucleusContext().getMetaDataManager().getClassesImplementingInterface(valueType, clr);
                    Class[] cls = new Class[clsNames.length];
                    for (int i=0; i<clsNames.length; i++)
                    {
                        cls[i] = clr.classForName(clsNames[i]);
                    }
                    sqlStmt = new DiscriminatorStatementGenerator(storeMgr, clr, cls, true, null, null).getStatement();
                }
                else
                {

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     */
    protected SQLStatement getSQLStatementForGet(ObjectProvider ownerSM)
    {
        SQLStatement sqlStmt = null;


        final ClassLoaderResolver clr = ownerSM.getExecutionContext().getClassLoaderResolver();
        final Class valueCls = clr.classForName(this.valueType);
        RDBMSStoreManager storeMgr = (RDBMSStoreManager)this.storeMgr;
        if (valuesAreEmbedded || valuesAreSerialised)
        {
            // Value is stored in join table
            sqlStmt = new SQLStatement(storeMgr, mapTable, null, null);

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        }


        SQLStatement sqlStmt = null;


        RDBMSStoreManager storeMgr = (RDBMSStoreManager)this.storeMgr;
        final ClassLoaderResolver clr = ownerSM.getExecutionContext().getClassLoaderResolver();
        if (elementInfo.length == 1 &&
            elementInfo[0].getDatastoreClass().getDiscriminatorMetaData() != null &&
            elementInfo[0].getDatastoreClass().getDiscriminatorMetaData().getStrategy() != DiscriminatorStrategy.NONE)
        {
            String elementType = ownerMemberMetaData.getCollection().getElementType();
            if (ClassUtils.isReferenceType(clr.classForName(elementType)))
            {
                String[] clsNames =
                    storeMgr.getNucleusContext().getMetaDataManager().getClassesImplementingInterface(elementType, clr);
                Class[] cls = new Class[clsNames.length];
                for (int i=0; i<clsNames.length; i++)
                {
                    cls[i] = clr.classForName(clsNames[i]);
                }
                sqlStmt = new DiscriminatorStatementGenerator(storeMgr, clr, cls, true, null, null).getStatement();
            }
            else
            {
                sqlStmt = new DiscriminatorStatementGenerator(storeMgr, clr,
                    clr.classForName(elementInfo[0].getClassName()), true, null, null).getStatement();
            }
            iterateUsingDiscriminator = true;


            // Select the required fields
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, resultMapping,
                ownerSM.getExecutionContext().getFetchPlan(), sqlStmt.getPrimaryTable(), emd, 0);
        }
        else
        {
            for (int i=0;i<elementInfo.length;i++)
            {
                final Class elementCls = clr.classForName(this.elementInfo[i].getClassName());
                UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, elementCls, true, null, null);
                stmtGen.setOption(StatementGenerator.OPTION_SELECT_NUCLEUS_TYPE);
                resultMapping.setNucleusTypeColumnName(UnionStatementGenerator.NUC_TYPE_COLUMN);
                SQLStatement subStmt = stmtGen.getStatement();

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        {
            return poolingType;
        }


        poolingType = requiredPoolingType;
        ClassLoaderResolver clr = storeMgr.getNucleusContext().getClassLoaderResolver(null);


        if (poolingType != null)
        {
            // User-specified, so check availability
            if (poolingType.equals("DBCP") && !dbcpPresent(clr))

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        storeMgr.assertReadOnlyForUpdateOfObject(sm);


        // Check if we need to do any updates to the schema before inserting this object
        checkForSchemaUpdatesForFieldsOfObject(sm, sm.getLoadedFieldNumbers());


        ClassLoaderResolver clr = sm.getExecutionContext().getClassLoaderResolver();
        String className = sm.getClassMetaData().getFullClassName();
        DatastoreClass dc = storeMgr.getDatastoreClass(className, clr);
        if (dc == null)
        {
            if (sm.getClassMetaData().getInheritanceMetaData().getStrategy() == InheritanceStrategy.SUBCLASS_TABLE)

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        AbstractMemberMetaData[] mmds = null;
        if (memberNumbers != null && memberNumbers.length > 0)
        {
            int[] memberNumbersToProcess = memberNumbers;
            AbstractClassMetaData cmd = op.getClassMetaData();
            ClassLoaderResolver clr = op.getExecutionContext().getClassLoaderResolver();


            if (storeMgr.getBooleanProperty("datanucleus.rdbms.fetchUnloadedAutomatically"))
            {
                // Option to automatically load up any non-loaded fields as deemed appropriate
                // Here we simply load up any unloaded non-relation or 1-1/N-1 members

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            if (storeMgr.getRuntimeManager() != null)
            {
                storeMgr.getRuntimeManager().incrementUpdateCount();
            }


            ClassLoaderResolver clr = sm.getExecutionContext().getClassLoaderResolver();
            DatastoreClass dc = storeMgr.getDatastoreClass(sm.getObject().getClass().getName(), clr);
            updateTable(dc, sm, clr, fmds);
        }
    }

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        if (storeMgr.getRuntimeManager() != null)
        {
            storeMgr.getRuntimeManager().incrementDeleteCount();
        }


        ClassLoaderResolver clr = sm.getExecutionContext().getClassLoaderResolver();
        DatastoreClass dc = storeMgr.getDatastoreClass(sm.getClassMetaData().getFullClassName(), clr);
        deleteTable(dc, sm, clr);
    }

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     * @throws NucleusObjectNotFoundException if the object doesnt exist
     * @throws NucleusDataStoreException when an error occurs in the datastore communication
     */
    public void locateObject(ObjectProvider sm)
    {
        ClassLoaderResolver clr = sm.getExecutionContext().getClassLoaderResolver();
        DatastoreClass table = storeMgr.getDatastoreClass(sm.getObject().getClass().getName(), clr);
        getLocateRequest(table, sm.getObject().getClass().getName()).execute(sm);
    }

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