ADF工具類：TaskFlowUtils.java 源代碼

package view;

import java.util.Collection;

import java.util.HashMap;

import java.util.Map;

import javax.faces.application.Application;

import javax.faces.context.FacesContext;

import oracle.adf.controller.ControllerContext;

import oracle.adf.controller.TaskFlowContext;

import oracle.adf.controller.TaskFlowId;

import oracle.adf.controller.ViewPortContext;

import oracle.adf.controller.metadata.MetadataService;

import oracle.adf.controller.metadata.model.DataControlScopeType;

import oracle.adf.controller.metadata.model.NamedParameter;

import oracle.adf.controller.metadata.model.TaskFlowDefinition;

import oracle.adf.controller.metadata.model.TaskFlowInputParameter;

import oracle.adf.controller.metadata.model.TransactionType;

import oracle.adf.model.BindingContext;

import oracle.adf.model.DataControlFrame;

import oracle.adf.model.binding.DCDataControl;

import oracle.adf.view.rich.context.AdfFacesContext;

public class TaskFlowUtils {

    public String getTaskFlowName() {

        MetadataService metadataService = MetadataService.getInstance();

        TaskFlowDefinition taskFlowDefinition = metadataService.getTaskFlowDefinition(getCurrentTaskFlowId());

        String taskFlowName = null;

        if (taskFlowDefinition != null) {

            TaskFlowId taskFlowId = taskFlowDefinition.getTaskFlowId();

            if (taskFlowId != null)

                taskFlowName = taskFlowDefinition.getTaskFlowId().getFullyQualifiedName();

            else

                taskFlowName = "Null";

        } else

            taskFlowName = "Null";

        return taskFlowName;

    }

    public String getTaskFlowControlScopeName() {

        MetadataService metadataService = MetadataService.getInstance();

        String controlScopeTypeString;

        TaskFlowDefinition taskFlowDefinition = metadataService.getTaskFlowDefinition(getCurrentTaskFlowId());

        if (taskFlowDefinition != null) {

            String taskFlowName = taskFlowDefinition.getTaskFlowId().getFullyQualifiedName();

            DataControlScopeType controlScopeType = taskFlowDefinition.getDataControlScopeType();

            if (controlScopeType == null || controlScopeType == DataControlScopeType.SHARED)

                controlScopeTypeString = "Shared Data Control Scope";

            else if (controlScopeType == DataControlScopeType.ISOLATED)

                controlScopeTypeString = "Isolated Data Control Scope";

            else

                controlScopeTypeString = "UNKNOWN Data Control Scope";

        } else

            controlScopeTypeString = "Null";

        return controlScopeTypeString;

    }

    public String getTaskFlowControlTransactionTypeName() {

        MetadataService metadataService = MetadataService.getInstance();

        String transactionTypeString;

        TaskFlowDefinition taskFlowDefinition = metadataService.getTaskFlowDefinition(getCurrentTaskFlowId());

        if (taskFlowDefinition != null) {

            String taskFlowName = taskFlowDefinition.getTaskFlowId().getFullyQualifiedName();

            TransactionType transactionType = taskFlowDefinition.getTransactionType();

            if (transactionType == null)

                transactionTypeString = "-No Controller Transaction-";

            else if (transactionType == TransactionType.NEW_TRANSACTION)

                transactionTypeString = "Always Begin New Transaction";

            else if (transactionType == TransactionType.REQUIRES_TRANSACTION)

                transactionTypeString = "Use Existing Transaction if Possible";

            else if (transactionType == TransactionType.REQUIRES_EXISTING_TRANSACTION)

                transactionTypeString = "Always Use Existing Transaction";

            else

                transactionTypeString = "UNKNOWN Transaction Type";

        } else

            transactionTypeString = "Null";

        return transactionTypeString;

    }

    public HashMap formatTaskFlowParameters(Map btfParameters) {

        HashMap taskFlowParameterValues = new HashMap();

        FacesContext facesContext = FacesContext.getCurrentInstance();

        Application application = facesContext.getApplication();

        AdfFacesContext adfFacesContext = AdfFacesContext.getCurrentInstance();

        Map pageFlowScope = adfFacesContext.getPageFlowScope();

        for (Object parameter : btfParameters.values()) {

            NamedParameter namedParameter = (NamedParameter)parameter;

            String parameterName = namedParameter.getName();

            String parameterExpression = namedParameter.getValueExpression();

            Object parameterValue;

            String stringValue;

            if (parameterExpression == null) {

                parameterValue = pageFlowScope.get(parameterName);

            } else {

                parameterValue = application.evaluateExpressionGet(facesContext, parameterExpression, Object.class);

            }

            if (parameterValue != null) {

                try {

                    stringValue = parameterValue.toString();

                } catch (Exception e) {

                    stringValue = "";

                }

            } else {

                stringValue = "";

            }

            taskFlowParameterValues.put(parameterName, stringValue);

        }

        return taskFlowParameterValues;

    }

    public TaskFlowId getCurrentTaskFlowId() {

        ControllerContext controllerContext = ControllerContext.getInstance();

        ViewPortContext currentViewPort = controllerContext.getCurrentViewPort();

        TaskFlowContext taskFlowContext = currentViewPort.getTaskFlowContext();

        TaskFlowId taskFlowId = taskFlowContext.getTaskFlowId();

        return taskFlowId;

    }

    public TaskFlowDefinition getTaskFlowDefinition(TaskFlowId taskFlowId) {

        MetadataService metadataService = MetadataService.getInstance();

        TaskFlowDefinition taskFlowDefinition = metadataService.getTaskFlowDefinition(taskFlowId);

        return taskFlowDefinition;

    }

    public Map getCurrentTaskFlowInputParameters() {

        return getInputParameters(getCurrentTaskFlowId());

    }

    public Map getInputParameters(TaskFlowId taskFlowId) {

        TaskFlowDefinition taskFlowDefinition = getTaskFlowDefinition(taskFlowId);

        Map taskFlowInputParameters = taskFlowDefinition.getInputParameters();

        return taskFlowInputParameters;

    }

    public Map getCurrentTaskFlowReturnParameters() {

        return getReturnParameters(getCurrentTaskFlowId());

    }

    public Map getReturnParameters(TaskFlowId taskFlowId) {

        TaskFlowDefinition taskFlowDefinition = getTaskFlowDefinition(taskFlowId);

        Map namedParameters = taskFlowDefinition.getReturnValues();

        return namedParameters;

    }

    public String getDataControlFrameName() {

        BindingContext bindingContext = oracle.adf.controller.binding.BindingUtils.getBindingContext();

        String dataControlFrameName = bindingContext.getCurrentDataControlFrame();

        return dataControlFrameName;

    }

    public DataControlFrame getDataControlFrame() {

        BindingContext bindingContext = oracle.adf.controller.binding.BindingUtils.getBindingContext();

        String dataControlFrameName = bindingContext.getCurrentDataControlFrame();

        DataControlFrame dataControlFrame = bindingContext.findDataControlFrame(dataControlFrameName);

        return dataControlFrame;

    }

    public void commitTaskFlow() {

        getDataControlFrame().commit();

    }

    public void rollbackTaskFlow() {

        getDataControlFrame().rollback();

    }

    public boolean isTaskFlowTransactionDirty() {

        return getDataControlFrame().isTransactionDirty();

    }

    public String getOpenTransactionName() {

        return getDataControlFrame().getOpenTransactionName();

    }

    public String getDataControlNames() {

        BindingContext bindingContext = oracle.adf.controller.binding.BindingUtils.getBindingContext();

        String dataControlFrameName = bindingContext.getCurrentDataControlFrame();

        DataControlFrame dataControlFrame = bindingContext.findDataControlFrame(dataControlFrameName);

        Collection dataControls = dataControlFrame.datacontrols();

        String names = "";

        for (DCDataControl dc : dataControls) {

            names = names + "," + dc.getName() + dc.hashCode();

        }

        return names;

    }

}