/*
    * Copyright 2004-2006 the Seasar Foundation and the Others.
    *
    * 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.seasar.tuigwaa.database.function;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.seasar.tuigwaa.database.DataTable;
  import org.seasar.tuigwaa.database.DataTableImpl;
  import org.seasar.tuigwaa.database.ExtraRowDataTable;
  import org.seasar.tuigwaa.database.SelectedColumnDataTableImpl;
  import org.seasar.tuigwaa.database.function.criteria.CriteriaFunction;
  import org.seasar.tuigwaa.database.function.criteria.CriteriaListFunction;
  import org.seasar.tuigwaa.database.function.criteria.DataTableCriteria;
  import org.seasar.tuigwaa.database.function.criteria.ICriteria;
  import org.seasar.tuigwaa.database.function.criteria.UnaryCriteriaFunction;
  import org.seasar.tuigwaa.util.functor.Op;
  
  import com.isenshi.util.functor.Function;
  import com.isenshi.util.functor.UnaryFunction;
  
  public class CriteriaExeFunction extends AbstractCriteriaExeFunction implements
  		Function, UnaryFunction {
  
  	private boolean valueFlag = false;
  
  	private boolean spreadSheetFlag = false;
  
  	private UnaryCriteriaFunction unaryFunction_;
  
  	private UnaryCriteriaFunction dataTableFilter_;
  
  	private List selectedHeaders;
  
  	private boolean extraRowFlag;
  
  	private Map extraProjectionMap = new HashMap();
  
  	public void setDataTableFilter(UnaryCriteriaFunction function) {
  		this.dataTableFilter_ = function;
  	}
  
  	// [Start] ----- Setter Getter Method ------
  
  	public UnaryCriteriaFunction getDataTableFilter() {
  		return dataTableFilter_;
  	}
  
  	public UnaryCriteriaFunction getUnaryCriteriaFunction() {
  		return unaryFunction_;
  	}
  
  	public void setUnaryCriteriaFunction(UnaryCriteriaFunction unaryFunction) {
  		this.unaryFunction_ = unaryFunction;
  	}
  
  	public List getSelectedHeaders() {
  		if (selectedHeaders != null && selectedHeaders.size() > 0) {
  			List list = new ArrayList();
  			Iterator itr = selectedHeaders.iterator();
  			while (itr.hasNext()) {
  				String str = (String) itr.next();
  				if (str != null && !"".equals(str)) {
  					list.add(str);
  				}
  			}
  			if (list.size() > 0) {
  				return list;
  			}
  		}
  		return null;
  	}
  
  	public void addSelectedHeader(String header) {
  		if (selectedHeaders == null) {
  			selectedHeaders = new ArrayList();
  		}
  		if (StringUtils.isNotEmpty(header)) {
  			selectedHeaders.add(header);
  		}
  
  	}
 
 	public boolean isValueFlag() {
 		return valueFlag;
 	}
 
 	public void setValueFlag(boolean valueFlag) {
 		this.valueFlag = valueFlag;
 	}
 
 	public boolean isSpreadSheetFlag() {
 		return spreadSheetFlag;
 	}
 
 	public void setSpreadSheetFlag(boolean spreadSheetFlag) {
 		this.spreadSheetFlag = spreadSheetFlag;
 	}
 
 	public void setExtraRowFlag(boolean extraRowFlag) {
 		this.extraRowFlag = extraRowFlag;
 	}
 
 	// [End] ----- Setter Getter Method ------
 
 	public Object evaluate() {
 		return evaluate(null);
 	}
 
 	public Object evaluate(Object injectFunction) {
 		ICriteria criteria = createHibernateCriteria();
 		criteria = (ICriteria) createCriteriaFunction(injectFunction).evaluate(
 				criteria);
 
 		DataTable dataTable = criteria.list();
 		if (getDataTableFilter() != null) {
 			ICriteria dataCriteria = new DataTableCriteria(dataTable);
 			dataCriteria = (ICriteria) getDataTableFilter().evaluate(
 					dataCriteria);
 			dataTable = dataCriteria.list();
 		}
 		if (extraRowFlag) {
 			dataTable = new ExtraRowDataTable(dataTable, Op.SUM);
 		}
 		return convert(dataTable);
 	}
 
 	// [Start] ------ Private Method -------
 
 	private UnaryCriteriaFunction createCriteriaFunction(Object injectFunction) {
 		if (injectFunction == null) {
 			return getUnaryCriteriaFunction();
 		}
 		CriteriaListFunction listFunction = new CriteriaListFunction();
 		listFunction.addFunction((CriteriaFunction) injectFunction);   //後から付け加えたCriteria を先に実行
 		listFunction.addFunction((CriteriaFunction) getUnaryCriteriaFunction());
 		return listFunction;
 	}
 
 	private Object convert(DataTable dataTable) {
 		if (getSelectedHeaders() != null) {
 			return new SelectedColumnDataTableImpl(dataTable,
 					getSelectedHeaders());
 		} else if (isSpreadSheetFlag()) {
 			return ((DataTableImpl) dataTable).createSpreadSheet();
 		} else if (isValueFlag()) {
 			return dataTable.getData(0, 0);
 		} else {
 			return dataTable;
 		}
 	}
 }