Program: 123071
Project: 123071
Buggy source:
public void init(TreeViewer viewer,IStructuredSelection selection){
  boolean canWork=!selection.isEmpty() && selection.size() == 1;
  if (canWork) {
    IProxyRepositoryFactory factory=ProxyRepositoryFactory.getInstance();
    if (factory.isUserReadOnlyOnCurrentProject()) {
      canWork=false;
    }
 else {
      Object o=selection.getFirstElement();
      RepositoryNode node=(RepositoryNode)o;
      ENodeType nodeType=node.getType();
switch (nodeType) {
case REPOSITORY_ELEMENT:
        ERepositoryObjectType objectType=node.getObjectType();
      if (objectType == ERepositoryObjectType.METADATA_CON_TABLE) {
        IRepositoryViewObject repositoryObject=node.getObject();
        if (repositoryObject != null) {
          Item item2=repositoryObject.getProperty().getItem();
          if (item2 instanceof DatabaseConnectionItem) {
            DatabaseConnectionItem item=(DatabaseConnectionItem)repositoryObject.getProperty().getItem();
            DatabaseConnection connection=(DatabaseConnection)item.getConnection();
            CDCConnection cdcConns=connection.getCdcConns();
            if (cdcConns != null) {
              if (repositoryObject instanceof MetadataTableRepositoryObject) {
                MetadataTable table=((MetadataTableRepositoryObject)repositoryObject).getTable();
                String tableType=table.getTableType();
                canWork=RepositoryConstants.TABLE.equals(tableType);
                break;
              }
            }
          }
        }
        canWork=true;
      }
 else       if (objectType == ERepositoryObjectType.METADATA_CON_QUERY || objectType == ERepositoryObjectType.METADATA_CONNECTIONS || objectType == ERepositoryObjectType.METADATA_FILE_DELIMITED || objectType == ERepositoryObjectType.METADATA_FILE_POSITIONAL || objectType == ERepositoryObjectType.METADATA_FILE_REGEXP || objectType == ERepositoryObjectType.METADATA_FILE_XML || objectType == ERepositoryObjectType.METADATA_FILE_LDIF || objectType == ERepositoryObjectType.METADATA_FILE_EXCEL || objectType == ERepositoryObjectType.METADATA_SAPCONNECTIONS || objectType == ERepositoryObjectType.METADATA_FILE_EBCDIC || objectType == ERepositoryObjectType.METADATA_FILE_HL7 || objectType == ERepositoryObjectType.METADATA_VALIDATION_RULES || objectType == ERepositoryObjectType.METADATA_FILE_FTP || objectType == ERepositoryObjectType.METADATA_FILE_BRMS || objectType == ERepositoryObjectType.METADATA_MDMCONNECTION || objectType == ERepositoryObjectType.CONTEXT || objectType == ERepositoryObjectType.JOBLET) {
        canWork=true;
      }
 else {
        Object obj=selection.getFirstElement();
        RepositoryNode nodeObj=(RepositoryNode)obj;
        Item item=nodeObj.getObject().getProperty().getItem();
        for (        IRepositoryContentHandler handler : RepositoryContentManager.getHandlers()) {
          ERepositoryObjectType stype=handler.getRepositoryObjectType(item);
          if (stype == objectType) {
            canWork=true;
            break;
          }
        }
        if (RepositoryContentManager.getHandlers().size() < 0) {
          canWork=false;
        }
      }
    break;
default :
  canWork=false;
}
RepositoryNode parent=node.getParent();
if (canWork && parent != null && parent instanceof BinRepositoryNode) {
canWork=false;
}
if (canWork && !ProjectManager.getInstance().isInCurrentMainProject(node)) {
canWork=false;
}
}
}
setEnabled(canWork);
}

Fixed version (ground truth):
public void init(TreeViewer viewer,IStructuredSelection selection){
  boolean canWork=!selection.isEmpty() && selection.size() == 1;
  if (canWork) {
    IProxyRepositoryFactory factory=ProxyRepositoryFactory.getInstance();
    if (factory.isUserReadOnlyOnCurrentProject()) {
      canWork=false;
    }
 else {
      Object o=selection.getFirstElement();
      RepositoryNode node=(RepositoryNode)o;
      ENodeType nodeType=node.getType();
switch (nodeType) {
case REPOSITORY_ELEMENT:
        ERepositoryObjectType objectType=node.getObjectType();
      if (objectType != null) {
        String[] products=objectType.getProducts();
        if (products != null && products.length == 1 && "String_Node_Str".equals(products[0])) {
          setEnabled(false);
          return;
        }
      }
    if (objectType == ERepositoryObjectType.METADATA_CON_TABLE) {
      IRepositoryViewObject repositoryObject=node.getObject();
      if (repositoryObject != null) {
        Item item2=repositoryObject.getProperty().getItem();
        if (item2 instanceof DatabaseConnectionItem) {
          DatabaseConnectionItem item=(DatabaseConnectionItem)repositoryObject.getProperty().getItem();
          DatabaseConnection connection=(DatabaseConnection)item.getConnection();
          CDCConnection cdcConns=connection.getCdcConns();
          if (cdcConns != null) {
            if (repositoryObject instanceof MetadataTableRepositoryObject) {
              MetadataTable table=((MetadataTableRepositoryObject)repositoryObject).getTable();
              String tableType=table.getTableType();
              canWork=RepositoryConstants.TABLE.equals(tableType);
              break;
            }
          }
        }
      }
      canWork=true;
    }
 else     if (objectType == ERepositoryObjectType.METADATA_CON_QUERY || objectType == ERepositoryObjectType.METADATA_CONNECTIONS || objectType == ERepositoryObjectType.METADATA_FILE_DELIMITED || objectType == ERepositoryObjectType.METADATA_FILE_POSITIONAL || objectType == ERepositoryObjectType.METADATA_FILE_REGEXP || objectType == ERepositoryObjectType.METADATA_FILE_XML || objectType == ERepositoryObjectType.METADATA_FILE_LDIF || objectType == ERepositoryObjectType.METADATA_FILE_EXCEL || objectType == ERepositoryObjectType.METADATA_SAPCONNECTIONS || objectType == ERepositoryObjectType.METADATA_FILE_EBCDIC || objectType == ERepositoryObjectType.METADATA_FILE_HL7 || objectType == ERepositoryObjectType.METADATA_VALIDATION_RULES || objectType == ERepositoryObjectType.METADATA_FILE_FTP || objectType == ERepositoryObjectType.METADATA_FILE_BRMS || objectType == ERepositoryObjectType.METADATA_MDMCONNECTION || objectType == ERepositoryObjectType.CONTEXT || objectType == ERepositoryObjectType.JOBLET) {
      canWork=true;
    }
 else     if (objectType == ERepositoryObjectType.BUSINESS_PROCESS || objectType == ERepositoryObjectType.PROCESS || objectType == ERepositoryObjectType.ROUTINES || objectType == ERepositoryObjectType.JOB_SCRIPT || objectType == ERepositoryObjectType.SQLPATTERNS || objectType == ERepositoryObjectType.JOB_DOC || objectType == ERepositoryObjectType.JOBLET_DOC || objectType == ERepositoryObjectType.DOCUMENTATION) {
      canWork=false;
    }
 else {
      Object obj=selection.getFirstElement();
      RepositoryNode nodeObj=(RepositoryNode)obj;
      Item item=nodeObj.getObject().getProperty().getItem();
      for (      IRepositoryContentHandler handler : RepositoryContentManager.getHandlers()) {
        ERepositoryObjectType stype=handler.getRepositoryObjectType(item);
        if (stype == objectType) {
          canWork=true;
          break;
        }
      }
      if (RepositoryContentManager.getHandlers().size() < 0) {
        canWork=false;
      }
    }
  break;
default :
canWork=false;
}
RepositoryNode parent=node.getParent();
if (canWork && parent != null && parent instanceof BinRepositoryNode) {
canWork=false;
}
if (canWork && !ProjectManager.getInstance().isInCurrentMainProject(node)) {
canWork=false;
}
}
}
setEnabled(canWork);
}