Examples of org.apache.derby.catalog.DependableFinder

org.apache.derby.catalog.DependableFinder
A DependableFinder is an object that can find an in-memory Dependable, given the Dependable's ID.
The DependableFinder is able to write itself to disk and, once read back into memory, locate the in-memory Dependable that it represents.
DependableFinder objects are stored in SYS.SYSDEPENDS to record dependencies between database objects.

    }


    DataValueDescriptor  col;
    String        dependentIDstring;
    UUID        dependentUUID;
    DependableFinder  dependentBloodhound;
    String        providerIDstring;
    UUID        providerUUID;
    DependableFinder  providerBloodhound;


    /* 1st column is DEPENDENTID (UUID - char(36)) */
    col = row.getColumn(SYSDEPENDS_DEPENDENTID);
    dependentIDstring = col.getString();
    dependentUUID = getUUIDFactory().recreateUUID(dependentIDstring);

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      for (ListIterator depsIterator = storedList.listIterator();
         depsIterator.hasNext(); ) 
      {
        Dependent       tempD;
        Provider        tempP;
        DependableFinder  finder = null;


        DependencyDescriptor depDesc = (DependencyDescriptor) depsIterator.next();


          finder = depDesc.getDependentFinder();
          tempD = (Dependent) finder.getDependable(dd, depDesc.getUUID() );


          if (providerForList != null)
          {
            // Use the provider being passed in.
            tempP = providerForList;
            
            // Sanity check the object identifiers match.
            if (SanityManager.DEBUG) {
              if (!tempP.getObjectID().equals(depDesc.getProviderID()))
              {
                SanityManager.THROWASSERT("mismatch providers");
              }
            }
          }
          else
          {
            finder = depDesc.getProviderFinder();
            tempP = (Provider) finder.getDependable(dd, depDesc.getProviderID() );
            
          }


        depsIterator.set(new BasicDependency(tempD, tempP));
      }

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  private String getDependsData(ResultSet rs,
    Connection conn, HashMap idToNameMap)
    throws Exception
  {


    DependableFinder dep =
      (DependableFinder)rs.getObject(3);


    DependableFinder prov =
      (DependableFinder)rs.getObject(5);


    String depType = dep.getSQLObjectType();
    String provType = prov.getSQLObjectType();


    Statement dependsStmt = conn.createStatement();
    StringBuffer dependsData = new StringBuffer();
    dependsData.append(getHiddenDependsData(depType,
      rs.getString(2), dependsStmt, idToNameMap));

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             depsIterator.hasNext();)
    {
      DependencyDescriptor depDesc = 
                (DependencyDescriptor) depsIterator.next();


      DependableFinder finder = depDesc.getProviderFinder();
      if (finder instanceof DDColumnDependableFinder)
      {
        DDColumnDependableFinder colFinder = 
                    (DDColumnDependableFinder) finder;
        FormatableBitSet oldColumnBitMap =

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            DefaultDescriptor   defDesc = cd.getDefaultDescriptor( dd );


            for ( int px = 0; px < providerCount; px++ )
            {
                ProviderInfo            pi = providers[ px ];
                DependableFinder    finder = pi.getDependableFinder();
                UUID                        providerID = pi.getObjectId();
                Provider                    provider = (Provider) finder.getDependable( dd, providerID );


                dm.addDependency( defDesc, provider, cm );
            }   // end loop through providers
        }
    }

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  private String getDependsData(ResultSet rs,
    Connection conn, HashMap idToNameMap)
    throws Exception
  {


    DependableFinder dep =
      (DependableFinder)rs.getObject(3);


    DependableFinder prov =
      (DependableFinder)rs.getObject(5);


    String depType = dep.getSQLObjectType();
    String provType = prov.getSQLObjectType();


    Statement dependsStmt = conn.createStatement();
    StringBuffer dependsData = new StringBuffer();
    dependsData.append(getHiddenDependsData(depType,
      rs.getString(2), dependsStmt, idToNameMap));

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            DefaultDescriptor   defDesc = cd.getDefaultDescriptor( dd );


            for ( int px = 0; px < providerCount; px++ )
            {
                ProviderInfo            pi = providers[ px ];
                DependableFinder    finder = pi.getDependableFinder();
                UUID                        providerID = pi.getObjectId();
                Provider                    provider = (Provider) finder.getDependable( dd, providerID );


                dm.addDependency( defDesc, provider, cm );
            }   // end loop through providers
        }
    }

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      depsOnAlterTableIterator.hasNext();)
    {
      //Go through all the dependent objects on the table being altered 
      DependencyDescriptor depOnAlterTableDesc = 
        (DependencyDescriptor) depsOnAlterTableIterator.next();
      DependableFinder dependent = depOnAlterTableDesc.getDependentFinder();
      //For the given dependent, we are only interested in it if it is a
      // stored prepared statement.
      if (dependent.getSQLObjectType().equals(Dependable.STORED_PREPARED_STATEMENT))
      {
        //Look for all the dependent objects that are using this 
        // stored prepared statement as provider. We are only 
        // interested in dependents that are triggers.
        List depsTrigger = dd.getProvidersDescriptorList(depOnAlterTableDesc.getUUID().toString());
        for (Iterator depsTriggerIterator = depsTrigger.listIterator();
          depsTriggerIterator.hasNext();)
        {
          DependencyDescriptor depsTriggerDesc = 
            (DependencyDescriptor) depsTriggerIterator.next();
          DependableFinder providerIsTrigger = depsTriggerDesc.getDependentFinder();
          //For the given dependent, we are only interested in it if
          // it is a trigger
          if (providerIsTrigger.getSQLObjectType().equals(Dependable.TRIGGER)) {
            //Drop and recreate the trigger after regenerating 
            // it's trigger action plan. If the trigger action
            // depends on the column being dropped, it will be
            // caught here.
            TriggerDescriptor trdToBeDropped  = dd.getTriggerDescriptor(depsTriggerDesc.getUUID());

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      for (ListIterator depsIterator = storedList.listIterator();
         depsIterator.hasNext(); ) 
      {
        Dependent       tempD;
        Provider        tempP;
        DependableFinder  finder = null;


        DependencyDescriptor depDesc = (DependencyDescriptor) depsIterator.next();


        try {
          finder = depDesc.getDependentFinder();
          tempD = (Dependent) finder.getDependable( depDesc.getUUID() );


          finder = depDesc.getProviderFinder();
          tempP = (Provider) finder.getDependable( depDesc.getProviderID() );
/*          if (finder instanceof DDColumnDependableFinder)
            ((TableDescriptor)tempP).setReferencedColumnMap(
              new FormatableBitSet(((DDColumnDependableFinder) finder).
                    getColumnBitMap()));
*/
        } catch (java.sql.SQLException te) {
          throw StandardException.newException(SQLState.DEP_UNABLE_TO_RESTORE, finder.getClass().getName(), te.getMessage());


        }


        depsIterator.set(new BasicDependency(tempD, tempP));
      }

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          throws StandardException 
  {
    DataValueDescriptor    col;
    ExecRow            row;
    String          dependentID = null;
    DependableFinder    dependentBloodhound = null;
    String          providerID = null;
    DependableFinder    providerBloodhound = null;


    if (td != null)
    {
      DependencyDescriptor dd = (DependencyDescriptor)td;
      dependentID  = dd.getUUID().toString();

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Related Classes of org.apache.derby.catalog.DependableFinder

org.apache.derby.iapi.sql.depend.DependableList

org.apache.derby.impl.sql.catalog.SYSDEPENDSRowFactory

org.apache.derby.impl.sql.depend.BasicDependencyManager

org.apache.derby.impl.sql.execute.AlterTableConstantAction

org.apache.derby.impl.sql.execute.DDLConstantAction

org.apache.derbyTesting.functionTests.tests.tools.dblook_test

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