gt: 		clone.fields = JRCloneUtils.cloneArray(fields);
context: /*
   * JasperReports - Free Java Reporting Library.
   * Copyright (C) 2001 - 2016 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 <http://www.gnu.org/licenses/>.
   */
  package net.sf.jasperreports.engine.base;
  
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.Serializable;
  import java.util.UUID;
  
  import net.sf.jasperreports.engine.JRConstants;
  import net.sf.jasperreports.engine.JRDataset;
  import net.sf.jasperreports.engine.JRExpression;
  import net.sf.jasperreports.engine.JRField;
  import net.sf.jasperreports.engine.JRGroup;
  import net.sf.jasperreports.engine.JRParameter;
  import net.sf.jasperreports.engine.JRPropertiesHolder;
  import net.sf.jasperreports.engine.JRPropertiesMap;
  import net.sf.jasperreports.engine.JRQuery;
  import net.sf.jasperreports.engine.JRRuntimeException;
  import net.sf.jasperreports.engine.JRScriptlet;
  import net.sf.jasperreports.engine.JRSortField;
  import net.sf.jasperreports.engine.JRVariable;
  import net.sf.jasperreports.engine.design.events.JRChangeEventsSupport;
  import net.sf.jasperreports.engine.design.events.JRPropertyChangeSupport;
  import net.sf.jasperreports.engine.type.WhenResourceMissingTypeEnum;
  import net.sf.jasperreports.engine.util.JRCloneUtils;
  
  /**
   * The base implementation of {@link net.sf.jasperreports.engine.JRDataset JRDataset}.
   * 
   * @author Lucian Chirita (lucianc@users.sourceforge.net)
   */
  public class JRBaseDataset implements JRDataset, Serializable, JRChangeEventsSupport
  {
  	private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
  	
  	public static final String PROPERTY_WHEN_RESOURCE_MISSING_TYPE = "whenResourceMissingType";
  
  	protected final boolean isMain;
  	protected UUID uuid;
  	protected String name;
  	protected String scriptletClass;
  	protected JRScriptlet[] scriptlets;
  	protected JRParameter[] parameters;
  	protected JRQuery query;
  	protected JRField[] fields;
  	protected JRSortField[] sortFields;
  	protected JRVariable[] variables;
  	protected JRGroup[] groups;
  	protected String resourceBundle;
  	protected WhenResourceMissingTypeEnum whenResourceMissingTypeValue = WhenResourceMissingTypeEnum.NULL;
  	protected JRPropertiesMap propertiesMap;
  	protected JRExpression filterExpression;
  	
  	protected JRBaseDataset(boolean isMain)
  	{
  		this.isMain = isMain;
  		
  		propertiesMap = new JRPropertiesMap();
  	}
  	
  	protected JRBaseDataset(JRDataset dataset, JRBaseObjectFactory factory)
  	{
  		factory.put(dataset, this);
  		
  		uuid = dataset.getUUID();
  		name = dataset.getName();
  		scriptletClass = dataset.getScriptletClass();
  		resourceBundle = dataset.getResourceBundle();
  		whenResourceMissingTypeValue = dataset.getWhenResourceMissingTypeValue();
  
  		/*   */
  		this.propertiesMap = dataset.getPropertiesMap().cloneProperties();
  
  		query = factory.getQuery(dataset.getQuery());
  
  		isMain = dataset.isMainDataset();
  		
  		/*   */
  		JRScriptlet[] jrScriptlets = dataset.getScriptlets();
  		if (jrScriptlets != null && jrScriptlets.length > 0)
  		{
  			scriptlets = new JRScriptlet[jrScriptlets.length];
  			for(int i = 0; i < scriptlets.length; i++)
  			{
  				scriptlets[i] = factory.getScriptlet(jrScriptlets[i]);
  			}
  		}
  		
  		/*   */
  		JRParameter[] jrParameters = dataset.getParameters();
  		if (jrParameters != null && jrParameters.length > 0)
  		{
  			parameters = new JRParameter[jrParameters.length];
  			for(int i = 0; i < parameters.length; i++)
  			{
  				parameters[i] = factory.getParameter(jrParameters[i]);
  			}
  		}
  		
  		/*   */
  		JRField[] jrFields = dataset.getFields();
  		if (jrFields != null && jrFields.length > 0)
  		{
  			fields = new JRField[jrFields.length];
  			for(int i = 0; i < fields.length; i++)
  			{
  				fields[i] = factory.getField(jrFields[i]);
  			}
  		}
  
  		/*   */
  		JRSortField[] jrSortFields = dataset.getSortFields();
  		if (jrSortFields != null && jrSortFields.length > 0)
  		{
  			sortFields = new JRSortField[jrSortFields.length];
  			for(int i = 0; i < sortFields.length; i++)
  			{
  				sortFields[i] = factory.getSortField(jrSortFields[i]);
  			}
  		}
  
  		/*   */
  		JRVariable[] jrVariables = dataset.getVariables();
  		if (jrVariables != null && jrVariables.length > 0)
  		{
  			variables = new JRVariable[jrVariables.length];
  			for(int i = 0; i < variables.length; i++)
  			{
  				variables[i] = factory.getVariable(jrVariables[i]);
  			}
  		}
  
  		/*   */
  		JRGroup[] jrGroups = dataset.getGroups();
  		if (jrGroups != null && jrGroups.length > 0)
  		{
  			groups = new JRGroup[jrGroups.length];
  			for(int i = 0; i < groups.length; i++)
  			{
  				groups[i] = factory.getGroup(jrGroups[i]);
  			}
  		}
  		
  		filterExpression = factory.getExpression(dataset.getFilterExpression());
  	}
  
  	
  	@Override
  	public UUID getUUID()
  	{
  		if (uuid == null)
  		{
  			uuid = UUID.randomUUID();
  		}
  		return uuid;
  	}
  	
  	@Override
  	public String getName()
  	{
  		return name;
  	}
  	
  	@Override
  	public String getScriptletClass()
  	{
  		return scriptletClass;
  	}
  
  	@Override
  	public JRQuery getQuery()
  	{
  		return query;
  	}
  
  	@Override
  	public JRScriptlet[] getScriptlets()
  	{
  		return scriptlets;
  	}
  
  	@Override
  	public JRParameter[] getParameters()
  	{
  		return parameters;
  	}
  
  	@Override
  	public JRField[] getFields()
  	{
  		return fields;
  	}
  
  	@Override
  	public JRSortField[] getSortFields()
  	{
  		return sortFields;
  	}
  
  	@Override
  	public JRVariable[] getVariables()
  	{
  		return variables;
  	}
  
  	@Override
  	public JRGroup[] getGroups()
  	{
  		return groups;
  	}
  
  	@Override
  	public boolean isMainDataset()
  	{
  		return isMain;
  	}
  
  	@Override
  	public String getResourceBundle()
  	{
  		return resourceBundle;
  	}
  
  	@Override
  	public WhenResourceMissingTypeEnum getWhenResourceMissingTypeValue()
  	{
  		return whenResourceMissingTypeValue;
  	}
  
  	@Override
  	public void setWhenResourceMissingType(WhenResourceMissingTypeEnum whenResourceMissingTypeValue)
  	{
  		Object old = this.whenResourceMissingTypeValue;
  		this.whenResourceMissingTypeValue = whenResourceMissingTypeValue;
  		getEventSupport().firePropertyChange(PROPERTY_WHEN_RESOURCE_MISSING_TYPE, old, this.whenResourceMissingTypeValue);
  	}
  
  	@Override
  	public boolean hasProperties()
  	{
  		return propertiesMap != null && propertiesMap.hasProperties();
  	}
  
  	@Override
  	public JRPropertiesMap getPropertiesMap()
  	{
  		return propertiesMap;
  	}
  
  	@Override
  	public JRPropertiesHolder getParentProperties()
  	{
  		return null;
  	}
  
  	@Override
  	public JRExpression getFilterExpression()
  	{
  		return filterExpression;
  	}
  	
  	@Override
  	public Object clone() 
  	{
  		JRBaseDataset clone = null;
  
  		try
  		{
  			clone = (JRBaseDataset)super.clone();
  		}
  		catch (CloneNotSupportedException e)
  		{
  			throw new JRRuntimeException(e);
  		}
  		
  		clone.query = JRCloneUtils.nullSafeClone(query);
  		clone.filterExpression = JRCloneUtils.nullSafeClone(filterExpression);
  		if (propertiesMap != null)
  		{
  			clone.propertiesMap = (JRPropertiesMap)propertiesMap.clone();
  		}
  
  		clone.parameters = JRCloneUtils.cloneArray(parameters);
  