reportbuilder/java/org/libreoffice/report/pentaho/SOFunctionManager.java

   1 /*
   2  * This file is part of the LibreOffice project.
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7  *
   8  * This file incorporates work covered by the following license notice:
   9  *
  10  *   Licensed to the Apache Software Foundation (ASF) under one or more
  11  *   contributor license agreements. See the NOTICE file distributed
  12  *   with this work for additional information regarding copyright
  13  *   ownership. The ASF licenses this file to you under the Apache
  14  *   License, Version 2.0 (the "License"); you may not use this file
  15  *   except in compliance with the License. You may obtain a copy of
  16  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  17  */
  18 package org.libreoffice.report.pentaho;
  19
  20 import com.sun.star.container.NoSuchElementException;
  21 import com.sun.star.lang.XServiceInfo;
  22 import com.sun.star.lib.uno.helper.ComponentBase;
  23 import com.sun.star.report.meta.XFunctionCategory;
  24 import com.sun.star.report.meta.XFunctionDescription;
  25 import com.sun.star.report.meta.XFunctionManager;
  26 import com.sun.star.uno.XComponentContext;
  27
  28 import org.pentaho.reporting.libraries.formula.DefaultFormulaContext;
  29 import org.pentaho.reporting.libraries.formula.function.FunctionCategory;
  30 import org.pentaho.reporting.libraries.formula.function.FunctionDescription;
  31 import org.pentaho.reporting.libraries.formula.function.FunctionRegistry;
  32
  33 public final class SOFunctionManager extends ComponentBase implements XFunctionManager, XServiceInfo
  34 {
  35
  36     private final XComponentContext m_xContext;
  37     /**
  38      * The service name, that must be used to get an instance of this service.
  39      */
  40     private static final String __serviceName =
  41             "com.sun.star.report.meta.FunctionManager";
  42     final private FunctionCategory[] categories;
  43     final private FunctionRegistry functionRegistry;
  44     final private DefaultFormulaContext defaultContext;
  45
  46     public SOFunctionManager(XComponentContext context)
  47     {
  48         m_xContext = context;
  49         final ClassLoader cl = java.lang.Thread.currentThread().getContextClassLoader();
  50         Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
  51         defaultContext = new DefaultFormulaContext();
  52         functionRegistry = defaultContext.getFunctionRegistry();
  53         categories = functionRegistry.getCategories();
  54         Thread.currentThread().setContextClassLoader(cl);
  55
  56     }
  57
  58     /**
  59      * This method returns an array of all supported service names.
  60      *
  61      * @return Array of supported service names.
  62      */
  63     public String[] getSupportedServiceNames()
  64     {
  65         return getServiceNames();
  66     }
  67
  68     /**
  69      * This method is a simple helper function to used in the static component initialisation functions as well as
  70      * in getSupportedServiceNames.
  71      */
  72     public static String[] getServiceNames()
  73     {
  74         return new String[]
  75                 {
  76                     __serviceName
  77                 };
  78     }
  79
  80     /**
  81      * This method returns true, if the given service will be supported by the component.
  82      *
  83      * @param sServiceName Service name.
  84      * @return True, if the given service name will be supported.
  85      */
  86     public boolean supportsService(final String sServiceName)
  87     {
  88         return sServiceName.equals(__serviceName);
  89     }
  90
  91     /**
  92      * Return the class name of the component.
  93      *
  94      * @return Class name of the component.
  95      */
  96     public String getImplementationName()
  97     {
  98         return SOFunctionManager.class.getName();
  99     }
 100
 101     // com.sun.star.container.XElementAccess:
 102     public com.sun.star.uno.Type getElementType()
 103     {
 104         return new com.sun.star.uno.Type(XFunctionCategory.class);
 105     }
 106
 107     public boolean hasElements()
 108     {
 109         return categories.length != 0;
 110     }
 111
 112     // com.sun.star.container.XIndexAccess:
 113     public int getCount()
 114     {
 115         return categories.length;
 116     }
 117
 118     public Object getByIndex(int Index) throws com.sun.star.lang.IndexOutOfBoundsException, com.sun.star.lang.WrappedTargetException
 119     {
 120         return getCategory(Index);
 121     }
 122
 123     // com.sun.star.report.meta.XFunctionManager:
 124     public com.sun.star.report.meta.XFunctionCategory getCategory(int position) throws com.sun.star.lang.IndexOutOfBoundsException, com.sun.star.lang.WrappedTargetException
 125     {
 126         if (position >= categories.length)
 127         {
 128             throw new com.sun.star.lang.IndexOutOfBoundsException();
 129         }
 130         return new StarFunctionCategory(defaultContext, m_xContext, functionRegistry, position, categories[position]);
 131     }
 132
 133     public XFunctionDescription getFunctionByName(String arg0) throws NoSuchElementException
 134     {
 135         final FunctionDescription func = functionRegistry.getMetaData(arg0);
 136         if (func == null)
 137         {
 138             throw new NoSuchElementException();
 139         }
 140         int i = 0;
 141         for (; i < categories.length; i++)
 142         {
 143             if (categories[i] == func.getCategory())
 144             {
 145                 break;
 146             }
 147         }
 148         try
 149         {
 150             return new StarFunctionDescription(defaultContext, m_xContext, getCategory(i), func);
 151         }
 152         catch (Exception ex)
 153         {
 154         }
 155         return null;
 156     }
 157 }