Package org.primefaces.component.export

Source Code of org.primefaces.component.export.DataExporterTagHandler

/*
* Copyright 2009 Prime Technology.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.primefaces.component.export;

import java.io.IOException;

import javax.el.ELException;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.component.ActionSource;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;

public class DataExporterTagHandler extends TagHandler {

  private final TagAttribute target;
  private final TagAttribute type;
  private final TagAttribute fileName;
  private final TagAttribute pageOnly;
  private final TagAttribute excludeColumns;
  private final TagAttribute preProcessor;
  private final TagAttribute postProcessor;
  private final TagAttribute encoding;

  public DataExporterTagHandler(TagConfig tagConfig) {
    super(tagConfig);
    this.target = getRequiredAttribute("target");
    this.type = getRequiredAttribute("type");
    this.fileName = getRequiredAttribute("fileName");
    this.pageOnly = getAttribute("pageOnly");
    this.excludeColumns = getAttribute("excludeColumns");
    this.encoding = getAttribute("encoding");
    this.preProcessor = getAttribute("preProcessor");
    this.postProcessor = getAttribute("postProcessor");
  }

  public void apply(FaceletContext faceletContext, UIComponent parent) throws IOException, FacesException, FaceletException, ELException {
    if (ComponentHandler.isNew(parent)) {
      ValueExpression targetVE = target.getValueExpression(faceletContext, Object.class);
      ValueExpression typeVE = type.getValueExpression(faceletContext, Object.class);
      ValueExpression fileNameVE = fileName.getValueExpression(faceletContext, Object.class);
      ValueExpression pageOnlyVE = null;
      ValueExpression excludeColumnsVE = null;
      ValueExpression encodingVE = null;
      MethodExpression preProcessorME = null;
      MethodExpression postProcessorME = null;
     
      if(excludeColumns != null) {
        excludeColumnsVE = excludeColumns.getValueExpression(faceletContext, Object.class);
      }
      if(encoding != null) {
        encodingVE = encoding.getValueExpression(faceletContext, Object.class);
      }
      if(pageOnly != null) {
        pageOnlyVE = pageOnly.getValueExpression(faceletContext, Object.class);
      }
      if(preProcessor != null) {
        preProcessorME = preProcessor.getMethodExpression(faceletContext, null, new Class[]{Object.class});
      }
      if(postProcessor != null) {
        postProcessorME = postProcessor.getMethodExpression(faceletContext, null, new Class[]{Object.class});
      }
     
      ActionSource actionSource = (ActionSource) parent;
      actionSource.addActionListener(new DataExporter(targetVE, typeVE, fileNameVE, pageOnlyVE,excludeColumnsVE,encodingVE, preProcessorME, postProcessorME));
    }
  }

}
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