net.sf.jasperreports.engine.query.JRClauseTokens Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.query;
import net.sf.jasperreports.engine.JRQueryChunk;
/**
* Query clause chunk wrapper.
*
* @author Lucian Chirita ([email protected])
* @see JRQueryChunk#getTokens()
* @see JRQueryChunk#TYPE_CLAUSE_TOKENS
*/
public class JRClauseTokens
{
/**
* The position of the clause Id token.
*
* @see #getClauseId()
*/
public static final int CLAUSE_ID_POSITION = 0;
private final String[] tokens;
/**
* Wraps an array of tokens.
*
* @param tokens the tokens
*/
public JRClauseTokens(final String[] tokens)
{
this.tokens = tokens;
}
/**
* Returns the clause Id, which is the first token in the clause.
*
* @return the clause Id
*/
public String getClauseId()
{
return getToken(CLAUSE_ID_POSITION);
}
/**
* Returns a token at a specified position.
*
* If the specified position is greater than the number of tokens or
* the token is empty, the method returns null
.
*
*
* @param position the position
* @return the token at the specified position
*/
public String getToken(int position)
{
String token;
if (tokens == null || tokens.length <= position)
{
token = null;
}
else
{
token = tokens[position];
}
if (token != null)
{
token = token.trim();
if (token.length() == 0)
{
token = null;
}
}
return token;
}
}