/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.filter.types;
import java.util.Locale;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.filter.FormatSpecification;
import org.pentaho.reporting.engine.classic.core.filter.RawDataSource;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementType;
import org.pentaho.reporting.engine.classic.core.metadata.ElementTypeRegistry;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.formatting.FastDecimalFormat;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class NumberFieldType implements ElementType, RawDataSource
{
private static final String DECIMALFORMAT_DEFAULT_PATTERN =
"#,###.###################################################" +
"#########################################################" +
"#########################################################" +
"#########################################################";
private transient ElementMetaData elementType;
private transient FastDecimalFormat decimalFormat;
private transient Locale locale;
private transient String formatString;
public NumberFieldType()
{
}
public ElementMetaData getMetaData()
{
if (elementType == null)
{
elementType = ElementTypeRegistry.getInstance().getElementType("number-field");
}
return elementType;
}
public Object getDesignValue(final ExpressionRuntime runtime, final Element element)
{
final Object staticValue = ElementTypeUtils.queryStaticValue(element);
if (staticValue instanceof Number)
{
Object formatStringRaw =
element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.FORMAT_STRING);
if (formatStringRaw == null || "".equals(formatStringRaw))
{
// return the default behavior of BigDecimal.toString() but localized.
formatStringRaw = NumberFieldType.DECIMALFORMAT_DEFAULT_PATTERN;
}
try
{
final Locale locale = runtime.getResourceBundleFactory().getLocale();
final FastDecimalFormat decimalFormat = new FastDecimalFormat
(String.valueOf(formatStringRaw), locale);
return decimalFormat.format(staticValue);
}
catch (Exception e)
{
// ignore .. fallback to show the fieldname
}
}
return ElementTypeUtils.queryFieldName(element);
}
/**
* Returns the unformated raw value. Whether that raw value is useable for the export is beyond the scope of this API
* definition, but providing access to {@link Number} or {@link java.util.Date} objects is a good idea.
*
* @param runtime the expression runtime that is used to evaluate formulas and expressions when computing the value of
* this filter.
* @param element
* @return the raw data.
*/
public Object getRawValue(final ExpressionRuntime runtime, final Element element)
{
if (runtime == null)
{
throw new NullPointerException("Runtime must never be null.");
}
if (element == null)
{
throw new NullPointerException("Element must never be null.");
}
final Object retval = ElementTypeUtils.queryFieldOrValue(runtime, element);
if (retval instanceof Number == false)
{
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
return retval;
}
/**
* Returns information about the formatstring that was used to transform a raw-value into a formatted text. Not all
* elements will make use of a format-string. These elements will return {@link org.pentaho.reporting.engine.classic.core.filter.FormatSpecification#TYPE_UNDEFINED}
* in that case.
*
* @param runtime the Expression runtime used to possibly compute the raw-value.
* @param element the element to which this datasource is added.
* @param formatSpecification the format specification (can be null). @return a filled format specififcation. If the
* <code>formatSpecification</code> parameter was not null, this given instance is reused.
*/
public FormatSpecification getFormatString(final ExpressionRuntime runtime,
final Element element,
FormatSpecification formatSpecification)
{
if (formatSpecification == null)
{
formatSpecification = new FormatSpecification();
}
final Object formatStringRaw =
element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.FORMAT_STRING);
if (formatStringRaw == null)
{
// return the default to-string behavior of java.util.Date
// formatStringRaw = NumberFieldType.DECIMALFORMAT_DEFAULT_PATTERN;
}
else
{
formatSpecification.redefine(FormatSpecification.TYPE_DECIMAL_FORMAT, String.valueOf(formatStringRaw));
}
return formatSpecification;
}
public void configureDesignTimeDefaults(final Element element, final Locale locale)
{
}
/**
* Returns the current value for the data source.
*
* @param runtime the expression runtime that is used to evaluate formulas and expressions when computing the value of
* this filter.
* @param element the element from which to read attribute.
* @return the value.
*/
public Object getValue(final ExpressionRuntime runtime, final Element element)
{
if (runtime == null)
{
throw new NullPointerException("Runtime must never be null.");
}
if (element == null)
{
throw new NullPointerException("Element must never be null.");
}
final Object retval = ElementTypeUtils.queryFieldOrValue(runtime, element);
if (retval instanceof Number == false)
{
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
Object formatStringRaw =
element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.FORMAT_STRING);
if (formatStringRaw == null || "".equals(formatStringRaw))
{
// return the default behavior of BigDecimal.toString() but localized.
formatStringRaw = NumberFieldType.DECIMALFORMAT_DEFAULT_PATTERN;
}
try
{
final Locale locale = runtime.getResourceBundleFactory().getLocale();
if (decimalFormat == null)
{
this.formatString = String.valueOf(formatStringRaw);
this.locale = locale;
this.decimalFormat = new FastDecimalFormat(formatString, locale);
}
else
{
if (ObjectUtilities.equal(formatString, formatStringRaw) == false)
{
this.formatString = String.valueOf(formatStringRaw);
this.decimalFormat.applyPattern(formatString);
}
if (ObjectUtilities.equal(this.locale, locale) == false)
{
this.locale = locale;
this.decimalFormat.setLocale(locale);
}
}
return decimalFormat.format(retval);
}
catch (Exception e)
{
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
}
/**
* Clones this <code>DataSource</code>.
*
* @return the clone.
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone() throws CloneNotSupportedException
{
final NumberFieldType o = (NumberFieldType) super.clone();
if (o.decimalFormat != null)
{
o.decimalFormat = (FastDecimalFormat) decimalFormat.clone();
}
return o;
}
}