001    /**
002     * =========================================
003     * LibFormula : a free Java formula library
004     * =========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/libformula/
007     *
008     * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     *
026     * ------------
027     * $Id: DefaultFormulaContext.java 3521 2007-10-16 10:55:14Z tmorgner $
028     * ------------
029     * (C) Copyright 2006-2007, by Pentaho Corporation.
030     */
031    package org.jfree.formula;
032    
033    import java.util.HashMap;
034    
035    import org.jfree.formula.function.DefaultFunctionRegistry;
036    import org.jfree.formula.function.FunctionRegistry;
037    import org.jfree.formula.operators.DefaultOperatorFactory;
038    import org.jfree.formula.operators.OperatorFactory;
039    import org.jfree.formula.typing.DefaultTypeRegistry;
040    import org.jfree.formula.typing.Type;
041    import org.jfree.formula.typing.TypeRegistry;
042    import org.jfree.formula.typing.coretypes.AnyType;
043    import org.jfree.util.Configuration;
044    
045    /**
046     * Creation-Date: 31.10.2006, 16:32:32
047     *
048     * @author Thomas Morgner
049     */
050    public class DefaultFormulaContext implements FormulaContext
051    {
052      private DefaultTypeRegistry typeRegistry;
053      private DefaultFunctionRegistry functionRegistry;
054      private OperatorFactory operatorFactory;
055      private DefaultLocalizationContext localizationContext;
056      private Configuration config;
057      private HashMap references;
058    
059      public DefaultFormulaContext()
060      {
061        this(LibFormulaBoot.getInstance().getGlobalConfig());
062      }
063    
064      public DefaultFormulaContext(final Configuration config)
065      {
066        this.config = config;
067        localizationContext = new DefaultLocalizationContext();
068        localizationContext.initialize(config);
069        typeRegistry = new DefaultTypeRegistry();
070        typeRegistry.initialize(config, this);
071        functionRegistry = new DefaultFunctionRegistry();
072        functionRegistry.initialize(config);
073        operatorFactory = new DefaultOperatorFactory();
074        operatorFactory.initalize(config);
075      }
076    
077      public OperatorFactory getOperatorFactory()
078      {
079        return operatorFactory;
080      }
081    
082      public void defineReference(final Object name, final Object value)
083      {
084        if (references == null)
085        {
086          references = new HashMap();
087        }
088        references.put(name, value);
089      }
090    
091      public Object resolveReference(final Object name)
092      {
093        if (references == null)
094        {
095          return null;
096        }
097        return references.get(name);
098      }
099    
100      public Configuration getConfiguration()
101      {
102        return config;
103      }
104    
105      public FunctionRegistry getFunctionRegistry()
106      {
107        return functionRegistry;
108      }
109    
110      public Type resolveReferenceType(final Object name)
111      {
112        return AnyType.TYPE;
113      }
114    
115      public TypeRegistry getTypeRegistry()
116      {
117        return typeRegistry;
118      }
119    
120      public LocalizationContext getLocalizationContext()
121      {
122        return localizationContext;
123      }
124    
125      public boolean isReferenceDirty(final Object name)
126      {
127        return true;
128      }
129    }