Example usage for javax.el ValueExpression isReadOnly

Introduction

In this page you can find the example usage for javax.el ValueExpression isReadOnly.

Prototype

public abstract boolean isReadOnly(ELContext context);

Source Link

Usage

From source file:org.ajax4jsf.component.UIDataAdaptor.java

/**
 * @return current state of this component.
 *//*  ww  w .  j a v  a 2 s. co m*/
public DataComponentState getComponentState() {
    DataComponentState state = null;
    if (this._currentState == null) {
        // Check for binding state to user bean.
        ValueExpression valueBinding = getValueExpression(UIDataAdaptor.COMPONENT_STATE_ATTRIBUTE);
        FacesContext facesContext = getFacesContext();
        ELContext elContext = facesContext.getELContext();
        if (null != valueBinding) {
            state = (DataComponentState) valueBinding.getValue(elContext);
            if (null == state) {
                // Create default state
                state = createComponentState();
                if (!valueBinding.isReadOnly(elContext)) {
                    // Store created state in user bean.
                    valueBinding.setValue(elContext, state);
                }
            }
        } else {
            // Check for stored state in map for parent iterations
            String baseClientId = getBaseClientId(facesContext);
            state = (DataComponentState) this._statesMap.get(baseClientId);
            if (null == state) {
                // Create default component state
                state = createComponentState();
                this._statesMap.put(baseClientId, state);
            }
            this._currentState = state;
        }
    } else {
        state = this._currentState;
    }
    return state;
}

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From source file:org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.java

private void updateModelFromPreservedDataModel(FacesContext context) {
    ValueExpression vb = getValueExpression("value");
    if (vb != null && !vb.isReadOnly(context.getELContext())) {
        DataModel qdm = getDataModel();//w  w  w  . ja v a 2s  . c  om
        if (qdm instanceof _SerializableDataModel) {
            _SerializableDataModel dm = (_SerializableDataModel) qdm;
            Class type = (getValueType() == null) ? vb.getType(context.getELContext())
                    : ClassUtils.simpleClassForName(getValueType());
            Class dmType = dm.getClass();
            if (DataModel.class.isAssignableFrom(type)) {
                vb.setValue(context.getELContext(), dm);
            } else if (List.class.isAssignableFrom(type)
                    || _SerializableListDataModel.class.isAssignableFrom(dmType)) {
                vb.setValue(context.getELContext(), dm.getWrappedData());
            } else if (OBJECT_ARRAY_CLASS.isAssignableFrom(type)) {
                List lst = (List) dm.getWrappedData();
                vb.setValue(context.getELContext(), lst.toArray(new Object[lst.size()]));
            } else if (ResultSet.class.isAssignableFrom(type)) {
                throw new UnsupportedOperationException(
                        this.getClass().getName() + " UnsupportedOperationException");
            } else {
                //Assume scalar data model
                List lst = (List) dm.getWrappedData();
                if (lst != null && lst.size() > 0) {
                    vb.setValue(context.getELContext(), lst.get(0));
                } else {
                    vb.setValue(context.getELContext(), null);
                }
            }
        }
    }
    _preservedDataModel = null;
}

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From source file:org.apache.myfaces.component.html.ext.AbstractHtmlDataTable.java

public void restoreState(FacesContext context, Object state) {
    if (state == null) {
        return;/*  w  ww  .  ja  va 2 s  .  c o  m*/
    }

    Object[] values = (Object[]) state;
    super.restoreState(context, values[0]);
    if (isPreserveDataModel()) {
        _preservedDataModel = (_SerializableDataModel) restoreAttachedState(context, values[1]);
    } else {
        _preservedDataModel = null;
    }

    if (isPreserveSort()) {
        String sortColumn = (String) values[2];
        Boolean sortAscending = (Boolean) values[3];
        if (sortColumn != null && sortAscending != null) {
            ValueExpression vb = getValueExpression("sortColumn");
            if (vb != null && !vb.isReadOnly(context.getELContext())) {
                vb.setValue(context.getELContext(), sortColumn);
            }

            vb = getValueExpression("sortAscending");
            if (vb != null && !vb.isReadOnly(context.getELContext())) {
                vb.setValue(context.getELContext(), sortAscending);
            }
        }
    }

    //_expandedNodes = (Map) values[4];
}

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