/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2006-2008 Sun Microsystems, Inc.
*/
package org.opends.server.tools.makeldif;
import org.opends.messages.Message;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Random;
import org.opends.server.types.InitializationException;
import static org.opends.messages.ToolMessages.*;
/**
* This class defines a tag that is used provide values from a text file. The
* file should have one value per line. Access to the values may be either at
* random or in sequential order.
*/
public class FileTag
extends Tag
{
// Indicates whether the values should be selected sequentially or at random.
private boolean sequential;
// The file containing the data.
private File dataFile;
// The index used for sequential access.
private int nextIndex;
// The random number generator for this tag.
private Random random;
// The array of lines read from the file.
private String[] fileLines;
/**
* Creates a new instance of this file tag.
*/
public FileTag()
{
sequential = false;
dataFile = null;
nextIndex = 0;
random = null;
fileLines = null;
}
/**
* Retrieves the name for this tag.
*
* @return The name for this tag.
*/
public String getName()
{
return "File";
}
/**
* Indicates whether this tag is allowed for use in the extra lines for
* branches.
*
* @return <CODE>true</CODE> if this tag may be used in branch definitions,
* or <CODE>false</CODE> if not.
*/
public boolean allowedInBranch()
{
return true;
}
/**
* Performs any initialization for this tag that may be needed while parsing
* a branch definition.
*
* @param templateFile The template file in which this tag is used.
* @param branch The branch in which this tag is used.
* @param arguments The set of arguments provided for this tag.
* @param lineNumber The line number on which this tag appears in the
* template file.
* @param warnings A list into which any appropriate warning messages
* may be placed.
*
* @throws InitializationException If a problem occurs while initializing
* this tag.
*/
public void initializeForBranch(TemplateFile templateFile, Branch branch,
String[] arguments, int lineNumber,
List<Message> warnings)
throws InitializationException
{
initializeInternal(templateFile, arguments, lineNumber, warnings);
}
/**
* Performs any initialization for this tag that may be needed while parsing
* a template definition.
*
* @param templateFile The template file in which this tag is used.
* @param template The template in which this tag is used.
* @param arguments The set of arguments provided for this tag.
* @param lineNumber The line number on which this tag appears in the
* template file.
* @param warnings A list into which any appropriate warning messages
* may be placed.
*
* @throws InitializationException If a problem occurs while initializing
* this tag.
*/
public void initializeForTemplate(TemplateFile templateFile,
Template template, String[] arguments,
int lineNumber, List<Message> warnings)
throws InitializationException
{
initializeInternal(templateFile, arguments, lineNumber, warnings);
}
/**
* Performs any initialization for this tag that may be needed.
*
* @param templateFile The template file in which this tag is used.
* @param arguments The set of arguments provided for this tag.
* @param lineNumber The line number on which this tag appears in the
* template file.
* @param warnings A list into which any appropriate warning messages
* may be placed.
*
* @throws InitializationException If a problem occurs while initializing
* this tag.
*/
private void initializeInternal(TemplateFile templateFile, String[] arguments,
int lineNumber, List<Message> warnings)
throws InitializationException
{
random = templateFile.getRandom();
// There must be at least one argument, and possibly two.
if ((arguments.length < 1) || (arguments.length > 2))
{
Message message = ERR_MAKELDIF_TAG_INVALID_ARGUMENT_RANGE_COUNT.get(
getName(), lineNumber, 1, 2, arguments.length);
throw new InitializationException(message);
}
// The first argument should be the path to the file.
dataFile = templateFile.getFile(arguments[0]);
if ((dataFile == null) || (! dataFile.exists()))
{
Message message = ERR_MAKELDIF_TAG_CANNOT_FIND_FILE.get(
arguments[0], getName(), lineNumber);
throw new InitializationException(message);
}
// If there is a second argument, then it should be either "sequential" or
// "random". If there isn't one, then we should assume "random".
if (arguments.length == 2)
{
if (arguments[1].equalsIgnoreCase("sequential"))
{
sequential = true;
nextIndex = 0;
}
else if (arguments[1].equalsIgnoreCase("random"))
{
sequential = false;
}
else
{
Message message = ERR_MAKELDIF_TAG_INVALID_FILE_ACCESS_MODE.get(
arguments[1], getName(), lineNumber);
throw new InitializationException(message);
}
}
else
{
sequential = false;
}
// See if the file has already been read into memory. If not, then read it.
try
{
fileLines = templateFile.getFileLines(dataFile);
}
catch (IOException ioe)
{
Message message = ERR_MAKELDIF_TAG_CANNOT_READ_FILE.get(
arguments[0], getName(), lineNumber, String.valueOf(ioe));
throw new InitializationException(message, ioe);
}
}
/**
* Generates the content for this tag by appending it to the provided tag.
*
* @param templateEntry The entry for which this tag is being generated.
* @param templateValue The template value to which the generated content
* should be appended.
*
* @return The result of generating content for this tag.
*/
public TagResult generateValue(TemplateEntry templateEntry,
TemplateValue templateValue)
{
if (sequential)
{
templateValue.append(fileLines[nextIndex++]);
if (nextIndex >= fileLines.length)
{
nextIndex = 0;
}
}
else
{
templateValue.append(fileLines[random.nextInt(fileLines.length)]);
}
return TagResult.SUCCESS_RESULT;
}
}