Program: 123435
Project: 123435
Buggy source:
public void execute(){
  canExecute();
  if (connectionName == null) {
    final INodeConnector mainConnector;
    EConnectionType connecType;
    if (source.isELTComponent()) {
      connecType=EConnectionType.TABLE;
    }
 else {
      connecType=EConnectionType.FLOW_MAIN;
    }
    mainConnector=source.getConnectorFromType(connecType);
    if (source.getConnectorFromName(connectorName).isMultiSchema()) {
      boolean connectionOk=false;
      while (!connectionOk) {
        connectionName=askForConnectionName(source.getLabel(),connectionName);
        if (connectionName.equals("String_Node_Str")) {
          creatingConnection=false;
          dispose();
          return;
        }
        metaName=connectionName;
        newMetadata=new MetadataTable();
        newMetadata.setTableName(connectionName);
        newMetadata.setLabel(connectionName);
        newMetadata.setAttachedConnector(connectorName);
        if ((connecType.equals(EConnectionType.TABLE) || source.getProcess().checkValidConnectionName(connectionName)) && (ConnectionManager.canConnectToTarget(source,null,target,source.getConnectorFromName(connectorName).getDefaultConnectionType(),connectorName,connectionName))) {
          connectionOk=true;
        }
 else {
          String message=Messages.getString("String_Node_Str",connectionName);
          MessageDialog.openError(null,Messages.getString("String_Node_Str"),message);
        }
      }
      IElementParameter elementParameter=source.getElementParameter("String_Node_Str");
      if (elementParameter != null) {
        Map<String,Object> map=new HashMap<String,Object>();
        Object[] itemsValue=elementParameter.getListItemsValue();
        String[] items=elementParameter.getListItemsDisplayCodeName();
        map.put(IEbcdicConstant.FIELD_CODE,newMetadata.getTableName());
        map.put(IEbcdicConstant.FIELD_SCHEMA,newMetadata.getTableName());
        for (int i=1; i < items.length; i++) {
          map.put(items[i],((IElementParameter)itemsValue[i]).getValue());
        }
        Object value=elementParameter.getValue();
        if (value instanceof List) {
          List list=(List)value;
          list.add(map);
        }
        ComponentSettings.switchToCurComponentSettingsView();
      }
    }
 else {
      newMetadata=null;
      if (source.isELTComponent()) {
        if (source.getComponent().getName().equals("String_Node_Str")) {
          connectionName=askForConnectionSchemaAndTableName(source.getLabel(),connectionName);
        }
 else {
          connectionName=askForConnectionName(source.getLabel(),connectionName);
        }
      }
 else {
        metaName=source.getMetadataFromConnector(mainConnector.getName()).getTableName();
        String baseName=source.getConnectionName();
        if (source.getProcess().checkValidConnectionName(baseName)) {
          connectionName=source.getProcess().generateUniqueConnectionName(baseName);
        }
      }
    }
  }
  if (insertTMap) {
    metaName=connectionName;
    newMetadata=new MetadataTable();
    newMetadata.setTableName(connectionName);
    newMetadata.setLabel(connectionName);
    newMetadata.setAttachedConnector(connectorName);
  }
  boolean monitorConnection=false;
  if (newLineStyle == null) {
    newLineStyle=source.getConnectorFromName(connectorName).getDefaultConnectionType();
  }
  if (newMetadata != null) {
    source.getMetadataList().add(newMetadata);
    this.connection=new Connection(source,target,newLineStyle,connectorName,metaName,connectionName,monitorConnection);
  }
 else {
    this.connection=new Connection(source,target,newLineStyle,connectorName,metaName,connectionName,metaName,monitorConnection);
  }
  INodeConnector nodeConnectorSource, nodeConnectorTarget;
  nodeConnectorSource=connection.getSourceNodeConnector();
  nodeConnectorSource.setCurLinkNbOutput(nodeConnectorSource.getCurLinkNbOutput() + 1);
  nodeConnectorTarget=connection.getTargetNodeConnector();
  nodeConnectorTarget.setCurLinkNbInput(nodeConnectorTarget.getCurLinkNbInput() + 1);
  creatingConnection=false;
  ((Process)source.getProcess()).checkStartNodes();
  source.checkAndRefreshNode();
  boolean isJoblet=false;
  if (PluginChecker.isJobLetPluginLoaded()) {
    IJobletProviderService jobletService=(IJobletProviderService)GlobalServiceRegister.getDefault().getService(IJobletProviderService.class);
    if (jobletService != null && jobletService.isJobletComponent(target)) {
      jobletService.upateJobletComonentList(target);
      isJoblet=true;
    }
  }
  if (!isJoblet) {
    target.checkAndRefreshNode();
  }
}

Fixed version (ground truth):
public void execute(){
  canExecute();
  if (connectionName == null) {
    final INodeConnector mainConnector;
    EConnectionType connecType;
    if (source.isELTComponent()) {
      connecType=EConnectionType.TABLE;
    }
 else {
      connecType=EConnectionType.FLOW_MAIN;
    }
    mainConnector=source.getConnectorFromType(connecType);
    if (source.getConnectorFromName(connectorName).isMultiSchema()) {
      boolean connectionOk=false;
      while (!connectionOk) {
        connectionName=askForConnectionName(source.getLabel(),connectionName);
        if (connectionName.equals("String_Node_Str")) {
          creatingConnection=false;
          dispose();
          return;
        }
        metaName=connectionName;
        newMetadata=new MetadataTable();
        newMetadata.setTableName(connectionName);
        newMetadata.setLabel(connectionName);
        newMetadata.setAttachedConnector(connectorName);
        if ((connecType.equals(EConnectionType.TABLE) || source.getProcess().checkValidConnectionName(connectionName)) && (ConnectionManager.canConnectToTarget(source,null,target,source.getConnectorFromName(connectorName).getDefaultConnectionType(),connectorName,connectionName))) {
          connectionOk=true;
        }
 else {
          String message=Messages.getString("String_Node_Str",connectionName);
          MessageDialog.openError(null,Messages.getString("String_Node_Str"),message);
        }
      }
      IElementParameter elementParameter=source.getElementParameter("String_Node_Str");
      if (elementParameter != null) {
        Map<String,Object> map=new HashMap<String,Object>();
        Object[] itemsValue=elementParameter.getListItemsValue();
        String[] items=elementParameter.getListItemsDisplayCodeName();
        map.put(IEbcdicConstant.FIELD_CODE,newMetadata.getTableName());
        map.put(IEbcdicConstant.FIELD_SCHEMA,newMetadata.getTableName());
        for (int i=1; i < items.length; i++) {
          map.put(items[i],((IElementParameter)itemsValue[i]).getValue());
        }
        Object value=elementParameter.getValue();
        if (value instanceof List) {
          List list=(List)value;
          list.add(map);
        }
        ComponentSettings.switchToCurComponentSettingsView();
      }
    }
 else {
      newMetadata=null;
      if (source.isELTComponent()) {
        if (source.getComponent().getName().equals("String_Node_Str")) {
          connectionName=askForConnectionSchemaAndTableName(source.getLabel(),connectionName);
        }
 else {
          connectionName=askForConnectionName(source.getLabel(),connectionName);
        }
      }
 else {
        metaName=source.getMetadataFromConnector(mainConnector.getName()).getTableName();
        String baseName=source.getConnectionName();
        if (source.getProcess().checkValidConnectionName(baseName)) {
          connectionName=source.getProcess().generateUniqueConnectionName(baseName);
        }
      }
    }
  }
  if (insertTMap) {
    metaName=connectionName;
    newMetadata=new MetadataTable();
    newMetadata.setTableName(connectionName);
    newMetadata.setLabel(connectionName);
    newMetadata.setAttachedConnector(connectorName);
  }
  boolean monitorConnection=false;
  if (newLineStyle == null) {
    newLineStyle=source.getConnectorFromName(connectorName).getDefaultConnectionType();
  }
  if (connection == null) {
    if (newMetadata != null) {
      source.getMetadataList().add(newMetadata);
      this.connection=new Connection(source,target,newLineStyle,connectorName,metaName,connectionName,monitorConnection);
    }
 else {
      this.connection=new Connection(source,target,newLineStyle,connectorName,metaName,connectionName,metaName,monitorConnection);
    }
  }
 else {
    connection.reconnect(source,target,newLineStyle);
  }
  INodeConnector nodeConnectorSource, nodeConnectorTarget;
  nodeConnectorSource=connection.getSourceNodeConnector();
  nodeConnectorSource.setCurLinkNbOutput(nodeConnectorSource.getCurLinkNbOutput() + 1);
  nodeConnectorTarget=connection.getTargetNodeConnector();
  nodeConnectorTarget.setCurLinkNbInput(nodeConnectorTarget.getCurLinkNbInput() + 1);
  creatingConnection=false;
  ((Process)source.getProcess()).checkStartNodes();
  source.checkAndRefreshNode();
  boolean isJoblet=false;
  if (PluginChecker.isJobLetPluginLoaded()) {
    IJobletProviderService jobletService=(IJobletProviderService)GlobalServiceRegister.getDefault().getService(IJobletProviderService.class);
    if (jobletService != null && jobletService.isJobletComponent(target)) {
      jobletService.upateJobletComonentList(target);
      isJoblet=true;
    }
  }
  if (!isJoblet) {
    target.checkAndRefreshNode();
  }
}