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OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, ...) and the REST/RESTFul API you will be able to integrate quickly and easily advanced full-text search capabilities in your application. OpenSearchServer runs on Windows and Linux/Unix/BSD.
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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2012 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see .
 **/

package com.jaeksoft.searchlib.render;

import java.io.IOException;
import java.util.List;
import java.util.Map;

import org.apache.commons.collections.CollectionUtils;

import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.function.expression.SyntaxError;
import com.jaeksoft.searchlib.query.ParseException;
import com.jaeksoft.searchlib.request.AbstractRequest;
import com.jaeksoft.searchlib.request.AbstractSearchRequest;
import com.jaeksoft.searchlib.request.RequestInterfaces;
import com.jaeksoft.searchlib.request.ReturnField;
import com.jaeksoft.searchlib.request.ReturnFieldList;
import com.jaeksoft.searchlib.result.AbstractResult;
import com.jaeksoft.searchlib.result.ResultDocument;
import com.jaeksoft.searchlib.result.ResultDocumentsInterface;
import com.jaeksoft.searchlib.schema.FieldValue;
import com.jaeksoft.searchlib.schema.FieldValueItem;
import com.jaeksoft.searchlib.snippet.SnippetField;
import com.jaeksoft.searchlib.snippet.SnippetFieldList;
import com.jaeksoft.searchlib.snippet.SnippetFieldValue;

public abstract class AbstractRenderDocumentsXml>
		extends AbstractRenderXml {

	private final ResultDocumentsInterface resultDocs;

	protected AbstractRenderDocumentsXml(T2 result) {
		super(result);
		resultDocs = result instanceof ResultDocumentsInterface ? (ResultDocumentsInterface) result
				: null;
	}

	final protected void renderDocuments() throws IOException, ParseException,
			SyntaxError, SearchLibException {
		int start = resultDocs.getRequestStart();
		int end = resultDocs.getDocumentCount() + start;
		writer.print("");
		for (int i = start; i < end; i++) {
			ResultDocument doc = resultDocs.getDocument(i, renderingTimer);
			this.renderDocument(i, doc);
		}
		writer.println("");
	}

	final protected void renderDocument(AbstractRequest abstractRequest,
			ResultDocument doc) throws IOException {
		if (doc == null)
			return;
		ReturnFieldList returnFieldList = null;
		SnippetFieldList snippetFieldList = null;
		if (abstractRequest instanceof AbstractSearchRequest) {
			returnFieldList = ((AbstractSearchRequest) abstractRequest)
					.getReturnFieldList();
			snippetFieldList = ((AbstractSearchRequest) abstractRequest)
					.getSnippetFieldList();
		} else if (abstractRequest instanceof RequestInterfaces.ReturnedFieldInterface) {
			returnFieldList = ((RequestInterfaces.ReturnedFieldInterface) abstractRequest)
					.getReturnFieldList();
		}
		if (returnFieldList != null)
			for (ReturnField field : returnFieldList)
				renderField(doc, field.getName());
		if (snippetFieldList != null)
			for (SnippetField field : snippetFieldList)
				renderSnippetValue(doc, field.getName());
	}

	final protected void renderDocument(ResultDocument doc) throws IOException {
		Map returnFields = doc.getReturnFields();
		if (returnFields != null)
			for (String fieldName : returnFields.keySet())
				renderField(doc, fieldName);
		Map snippetFields = doc.getSnippetFields();
		if (snippetFields != null)
			for (String fieldName : snippetFields.keySet())
				renderSnippetValue(doc, fieldName);
	}

	final protected void renderDocumentPrefix(int pos, ResultDocument doc) {
		writer.print("\t");
	}

	final protected void renderDocumentSuffix() {
		writer.println("\t");
	}

	final protected void renderDocumentContent(int pos, ResultDocument doc)
			throws SearchLibException, IOException {
		renderDocument(request, doc);
		int cc = resultDocs.getCollapseCount(pos);
		if (cc > 0) {
			writer.print("\t\t");
			writer.print(cc);
			writer.println("");
		}
	}

	protected void renderDocument(int pos, ResultDocument doc)
			throws IOException, ParseException, SyntaxError, SearchLibException {
		renderDocumentPrefix(pos, doc);
		renderDocumentContent(pos, doc);
		renderDocumentSuffix();
	}

	private void renderField(ResultDocument doc, String fieldName)
			throws IOException {
		List values = doc.getValues(fieldName);
		if (CollectionUtils.isEmpty(values)) {
			writer.print("\t\t");
			return;
		}
		for (FieldValueItem v : values) {
			writer.print("\t\t');
			writer.print(xmlTextRender(v.getValue()));
			writer.println("");
		}
	}

	private void renderSnippetValue(ResultDocument doc, String fieldName)
			throws IOException {
		List snippets = doc.getSnippetValues(fieldName);
		if (CollectionUtils.isEmpty(snippets)) {
			writer.print("\t\t");
			return;
		}
		boolean highlighted = doc.isHighlighted(fieldName);
		for (FieldValueItem snippet : snippets) {
			writer.print("\t\t');
			writer.print(xmlTextRender(snippet.getValue()));
			writer.println("\t\t");
		}
	}
}