/*
 * Copyright 2004-2008 IDCA. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
* 
*    1. Redistributions of source code must retain the above copyright notice, this list of conditions and
*        the following disclaimer.
*    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
*        and the following disclaimer in the documentation and/or other materials provided with the
*        distribution.
* 
* THIS SOFTWARE IS PROVIDED BY IDCA AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IDCA OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* 
* The views and conclusions contained in the software and documentation are those of the authors and
* should not be interpreted as representing official policies, either expressed or implied, of IDCA.
*/

package com.idcanet.vasc.impl;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.idcanet.vasc.core.AbstractVascBackendProxy;
import com.idcanet.vasc.core.VascBackend;
import com.idcanet.vasc.core.VascBackendPageNumber;
import com.idcanet.vasc.core.VascEntry;


/**
* Simple text search 
* 
* @author Willem Cazander
* @version 1.0 Oct 27, 2007
*/
public class VascBackendProxySearch extends AbstractVascBackendProxy {
	
	private long records = 0;
	
	public VascBackendProxySearch(VascBackend backend,VascEntry entry) {
		super(backend);
	}

	/**
	 * @see com.idcanet.vasc.core.VascBackend#isSearchable()
	 */
	@Override
	public boolean isSearchable() {
		return true;
	}
	
	/**
	 * @see com.idcanet.vasc.core.VascBackend#execute()
	 */
	@Override
	public List<Object> execute() throws Exception {
		List<Object> result =  backend.execute();
		if (getSearchString()==null) {
			records = backend.getPagesTotalRecords();
			return result;
		}
		String searchString = getSearchString().toLowerCase();
		List<Object> search = new ArrayList<Object>(result.size()/4);
		for (Object o:result) {
	        for (Method method:o.getClass().getMethods()) {
	            if (method.getName().startsWith("get")==false) {  //a bit durty  
	                continue;
	            }
	            if (method.getName().equals("getClass")) {  
	                continue;
	            }
	            if (method.getReturnType().isAssignableFrom(Collection.class)) {
	            	continue;
	            }
	            if (method.getReturnType().isAssignableFrom(List.class)) {
	            	continue;
	            }
	            if (method.getReturnType().isAssignableFrom(Set.class)) {
	            	continue;
	            }
	            if (method.getReturnType().isAssignableFrom(Map.class)) {
	            	continue;
	            }
	            Object res = method.invoke(o,null);
	            if (res==null) {
	            	continue;
	            }
	            String r = res.toString().toLowerCase();
	            if (r.contains(searchString)) {
	            	search.add(o);
	            	break;
	            }
	        }
		}
		records = search.size();
		return search;
	}
	
	@Override
	public long getPagesTotalRecords() {
		return records;
	}
	@Override
	public List<VascBackendPageNumber> getVascBackendPageNumbers() {
		if (getSearchString()==null) {
			return backend.getVascBackendPageNumbers();
		}
		// limit the pages to the number of search results.
		List<VascBackendPageNumber> r = backend.getVascBackendPageNumbers();
		int pages = new Long(getPagesTotalRecords()/getPageSize()).intValue();
		return r.subList(0, pages);
	}
}