/libformula-1.1.3/source/org/pentaho/reporting/libraries/formula/function/information/IsNumberFunction.java
Java | 67 lines | 36 code | 9 blank | 22 comment | 2 complexity | 56aeff6f2d1946e6c9088d2ca9a82a55 MD5 | raw file
Possible License(s): LGPL-2.1
- /*
- * 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) 2006 - 2009 Pentaho Corporation and Contributors. All rights reserved.
- */
- package org.pentaho.reporting.libraries.formula.function.information;
- import org.pentaho.reporting.libraries.formula.EvaluationException;
- import org.pentaho.reporting.libraries.formula.FormulaContext;
- import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
- import org.pentaho.reporting.libraries.formula.function.Function;
- import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
- import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
- import org.pentaho.reporting.libraries.formula.typing.Type;
- import org.pentaho.reporting.libraries.formula.typing.coretypes.LogicalType;
- /**
- * This function retruns true if the given value is of type Number.
- *
- * @author Cedric Pronzato
- *
- */
- public class IsNumberFunction implements Function
- {
- private static final TypeValuePair RETURN_TRUE = new TypeValuePair(LogicalType.TYPE, Boolean.TRUE);
- private static final TypeValuePair RETURN_FALSE = new TypeValuePair(LogicalType.TYPE, Boolean.FALSE);
- private static final long serialVersionUID = 3298090211745552284L;
- public IsNumberFunction()
- {
- }
- public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters) throws EvaluationException
- {
- final int parameterCount = parameters.getParameterCount();
- if (parameterCount < 1)
- {
- throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
- }
- final Type type1 = parameters.getType(0);
- if(type1.isFlagSet(Type.NUMERIC_TYPE))
- {
- return RETURN_TRUE;
- }
- return RETURN_FALSE;
- }
- public String getCanonicalName()
- {
- return "ISNUMBER";
- }
- }