001    package org.apache.myfaces.tobago.component;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    import org.apache.commons.fileupload.FileItem;
021    import static org.apache.myfaces.tobago.TobagoConstants.ATTR_ENCTYPE;
022    import static org.apache.myfaces.tobago.TobagoConstants.ATTR_TAB_INDEX;
023    import org.apache.myfaces.tobago.util.MessageFactory;
024    
025    import javax.faces.application.FacesMessage;
026    import javax.faces.component.UIComponent;
027    import javax.faces.context.FacesContext;
028    import javax.faces.el.ValueBinding;
029    
030    /*
031     * Date: 10.02.2006
032     * Time: 19:02:13
033     */
034    public class UIFileInput extends javax.faces.component.UIInput {
035      public static final String COMPONENT_TYPE = "org.apache.myfaces.tobago.FileInput";
036    
037      private Integer tabIndex;
038    
039      public void setParent(UIComponent uiComponent) {
040        super.setParent(uiComponent);
041        UIPage form = ComponentUtil.findPage(getFacesContext(), uiComponent);
042        if (form != null) {
043          form.getAttributes().put(ATTR_ENCTYPE, "multipart/form-data");
044        } else {
045          FacesContext.getCurrentInstance().getExternalContext().getRequestMap().put(UIPage.ENCTYPE_KEY,
046              "multipart/form-data");
047        }
048      }
049    
050      public void validate(FacesContext facesContext) {
051        if (isRequired()) {
052          if (getSubmittedValue() instanceof FileItem) {
053            FileItem file = (FileItem) getSubmittedValue();
054            if (file == null || file.getName().length() == 0) {
055              addErrorMessage(facesContext);
056              setValid(false);
057            }
058          } else {
059            addErrorMessage(facesContext);
060            setValid(false);
061          }
062        }
063        super.validate(facesContext);
064      }
065    
066      private void addErrorMessage(FacesContext facesContext) {
067        FacesMessage facesMessage = MessageFactory.createFacesMessage(
068            facesContext, REQUIRED_MESSAGE_ID, FacesMessage.SEVERITY_ERROR);
069        facesContext.addMessage(getClientId(facesContext), facesMessage);
070      }
071    
072      public void restoreState(FacesContext context, Object state) {
073        Object[] values = (Object[]) state;
074        super.restoreState(context, values[0]);
075        tabIndex = (Integer) values[1];
076      }
077    
078      public Object saveState(FacesContext context) {
079        Object[] values = new Object[2];
080        values[0] = super.saveState(context);
081        values[1] = tabIndex;
082        return values;
083      }
084    
085      public Integer getTabIndex() {
086        if (tabIndex != null) {
087          return tabIndex;
088        }
089        ValueBinding vb = getValueBinding(ATTR_TAB_INDEX);
090        if (vb != null) {
091          Number number = (Number) vb.getValue(getFacesContext());
092          if (number != null) {
093            return Integer.valueOf(number.intValue());
094          }
095        }
096        return null;
097      }
098    
099      public void setTabIndex(Integer tabIndex) {
100        this.tabIndex = tabIndex;
101      }
102    }