1 | /*
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2 | * The Apache Software License, Version 1.1
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3 | *
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4 | * Copyright (c) 2001-2002 The Apache Software Foundation. All rights
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5 | * reserved.
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6 | *
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7 | * Redistribution and use in source and binary forms, with or without
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8 | * modification, are permitted provided that the following conditions
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9 | * are met:
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10 | *
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11 | * 1. Redistributions of source code must retain the above copyright
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12 | * notice, this list of conditions and the following disclaimer.
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13 | *
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14 | * 2. Redistributions in binary form must reproduce the above copyright
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15 | * notice, this list of conditions and the following disclaimer in
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16 | * the documentation and/or other materials provided with the
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17 | * distribution.
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18 | *
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19 | * 3. The end-user documentation included with the redistribution, if
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20 | * any, must include the following acknowlegement:
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21 | * "This product includes software developed by the
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22 | * Apache Software Foundation (http://www.apache.org/)."
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23 | * Alternately, this acknowlegement may appear in the software itself,
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24 | * if and wherever such third-party acknowlegements normally appear.
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25 | *
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26 | * 4. The names "The Jakarta Project", "Ant", and "Apache Software
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27 | * Foundation" must not be used to endorse or promote products derived
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28 | * from this software without prior written permission. For written
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29 | * permission, please contact [email protected].
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30 | *
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31 | * 5. Products derived from this software may not be called "Apache"
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32 | * nor may "Apache" appear in their names without prior written
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33 | * permission of the Apache Group.
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34 | *
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35 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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36 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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37 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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38 | * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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41 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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42 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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43 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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44 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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45 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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46 | * SUCH DAMAGE.
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47 | * ====================================================================
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48 | *
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49 | * This software consists of voluntary contributions made by many
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50 | * individuals on behalf of the Apache Software Foundation. For more
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51 | * information on the Apache Software Foundation, please see
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52 | * <http://www.apache.org/>.
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53 | */
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54 | package ise.antelope.tasks;
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55 |
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56 | import org.apache.tools.ant.Task;
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57 | import org.apache.tools.ant.BuildException;
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58 | import java.util.Vector;
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59 | import java.util.Enumeration;
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60 |
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61 | import ise.antelope.tasks.util.math.*;
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62 |
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63 | /**
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64 | * Provides basic math functions. Simple calculations can be done via attributes
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65 | * only, more complex formulas can be set up via nested Ops.
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66 | * @author Dale Anson, [email protected]
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67 | */
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68 | public class MathTask extends Task {
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69 |
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70 | // storage for result
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71 | private String result = null;
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72 |
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73 | // storage for operation -- only one allowed
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74 | private Op op = null;
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75 |
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76 | // storage for operation passed as attribute
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77 | private String operation = null;
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78 |
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79 | // storage for an operand passed as an attribute
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80 | private String operand1 = null;
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81 |
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82 | // storage for an operand passed as an attribute
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83 | private String operand2 = null;
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84 |
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85 | // datatype for the result
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86 | private String datatype = null;
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87 |
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88 | // should the StrictMath library be used?
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89 | private boolean strict = false;
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90 |
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91 | /**
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92 | * Sets the name of the property to store the result in. This is stored
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93 | * in a user property, so is reusable.
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94 | * @param name the name of a property to set for a result.
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95 | */
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96 | public void setResult( String name ) {
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97 | result = name;
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98 | }
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99 |
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100 | /**
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101 | * Sets the datatype of this calculation. Allowed values are
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102 | * "int", "long", "float", or "double". Optional, if
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103 | * used, will be applied to all numbers in this math operation.
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104 | */
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105 | public void setDatatype( String type ) {
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106 | if ( type.equals( "int" ) )
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107 | datatype = "int";
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108 | else if ( type.equals( "long" ) )
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109 | datatype = "long";
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110 | else if ( type.equals( "float" ) )
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111 | datatype = "float";
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112 | else if ( type.equals( "double" ) )
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113 | datatype = "double";
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114 | else
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115 | throw new BuildException( "Invalid datatype: " + type +
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116 | ". Must be one of int, long, float, or double." );
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117 | }
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118 |
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119 | /**
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120 | * Set an operand as an attribute. This is for convenience, if used,
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121 | * it overrides any nested Ops. Must parse to a number.
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122 | */
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123 | public void setOperand1( String op ) throws BuildException {
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124 | operand1 = op;
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125 | }
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126 |
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127 | /**
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128 | * Set an operand as an attribute. This is for convenience, if used,
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129 | * it overrides any nested Ops. Must parse to a number.
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130 | */
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131 | public void setOperand2( String op ) throws BuildException {
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132 | operand2 = op;
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133 | }
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134 |
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135 | /**
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136 | * Set an operation as an attribute. This is for convenience, if used, it
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137 | * overrides any nested Ops.
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138 | * @param op any operation allowed by Op.
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139 | */
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140 | public void setOperation( String op ) {
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141 | operation = op;
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142 | }
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143 |
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144 | /**
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145 | * Add a nested operation. Only one operation is allowed at a time.
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146 | * @param op the operation to add.
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147 | */
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148 | public void addConfiguredOp( Op op ) {
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149 | if ( this.op != null )
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150 | throw new BuildException( "Only one operation allowed at a time!" );
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151 | if ( datatype != null )
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152 | op.setDatatype( datatype );
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153 | this.op = op;
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154 | }
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155 |
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156 | /**
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157 | * Use the StrictMath library.
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158 | */
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159 | public void setStrict( boolean b ) {
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160 | strict = b;
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161 | }
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162 |
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163 | public void execute() {
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164 | if ( result == null )
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165 | throw new BuildException( "Property name for result is null." );
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166 | if ( datatype == null )
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167 | datatype = "double";
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168 | if ( operation != null ) {
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169 | // operation as attribute overrides nested Op
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170 | op = new Op();
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171 | if ( datatype == null )
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172 | datatype = "double";
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173 | op.setDatatype( datatype );
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174 | op.setOp( operation );
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175 | if ( operand1 != null ) {
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176 | Num num = new Num();
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177 | num.setValue( operand1 );
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178 | op.addConfiguredNum( num );
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179 | }
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180 | if ( operand2 != null ) {
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181 | Num num = new Num();
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182 | num.setValue( operand2 );
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183 | op.addConfiguredNum( num );
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184 | }
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185 | }
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186 | if ( op == null )
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187 | throw new BuildException( "Nothing to do!" );
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188 | op.setDatatype( datatype );
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189 | op.setStrict( strict );
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190 | Num num = op.calculate();
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191 | getProject().setUserProperty( result, num.getValue().toString() );
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192 | }
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193 |
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194 | }
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