| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.tools.ant.taskdefs.condition; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.Task; |
| import org.apache.tools.ant.util.DeweyDecimal; |
| |
| /** |
| * An Ant version condition. |
| * @since Ant 1.7 |
| */ |
| public class AntVersion extends Task implements Condition { |
| |
| private String atLeast = null; |
| private String exactly = null; |
| private String propertyname = null; |
| |
| /** |
| * Run as a task. |
| * @throws BuildException if an error occurs. |
| */ |
| public void execute() throws BuildException { |
| if (propertyname == null) { |
| throw new BuildException("'property' must be set."); |
| } |
| if (atLeast!=null || exactly!=null) { |
| // If condition values are set, evaluate the condition |
| if (eval()) { |
| getProject().setNewProperty(propertyname, getVersion().toString()); |
| } |
| } else { |
| // Raw task |
| getProject().setNewProperty(propertyname, getVersion().toString()); |
| } |
| } |
| |
| /** |
| * Evalute the condition. |
| * @return true if the condition is true. |
| * @throws BuildException if an error occurs. |
| */ |
| public boolean eval() throws BuildException { |
| validate(); |
| DeweyDecimal actual = getVersion(); |
| if (null != atLeast) { |
| return actual.isGreaterThanOrEqual(new DeweyDecimal(atLeast)); |
| } |
| if (null != exactly) { |
| return actual.isEqual(new DeweyDecimal(exactly)); |
| } |
| //default |
| return false; |
| } |
| |
| private void validate() throws BuildException { |
| if (atLeast != null && exactly != null) { |
| throw new BuildException("Only one of atleast or exactly may be set."); |
| } |
| if (null == atLeast && null == exactly) { |
| throw new BuildException("One of atleast or exactly must be set."); |
| } |
| if (atLeast != null) { |
| try { |
| new DeweyDecimal(atLeast); |
| } catch (NumberFormatException e) { |
| throw new BuildException( |
| "The 'atleast' attribute is not a Dewey Decimal eg 1.1.0 : " |
| + atLeast); |
| } |
| } else { |
| try { |
| new DeweyDecimal(exactly); |
| } catch (NumberFormatException e) { |
| throw new BuildException( |
| "The 'exactly' attribute is not a Dewey Decimal eg 1.1.0 : " |
| + exactly); |
| } |
| } |
| } |
| |
| private DeweyDecimal getVersion() { |
| Project p = new Project(); |
| p.init(); |
| char[] versionString = p.getProperty("ant.version").toCharArray(); |
| StringBuffer sb = new StringBuffer(); |
| boolean foundFirstDigit = false; |
| for (int i = 0; i < versionString.length; i++) { |
| if (Character.isDigit(versionString[i])) { |
| sb.append(versionString[i]); |
| foundFirstDigit = true; |
| } |
| if (versionString[i] == '.' && foundFirstDigit) { |
| sb.append(versionString[i]); |
| } |
| if (Character.isLetter(versionString[i]) && foundFirstDigit) { |
| break; |
| } |
| } |
| return new DeweyDecimal(sb.toString()); |
| } |
| |
| /** |
| * Get the atleast attribute. |
| * @return the atleast attribute. |
| */ |
| public String getAtLeast() { |
| return atLeast; |
| } |
| |
| /** |
| * Set the atleast attribute. |
| * This is of the form major.minor.point. |
| * For example 1.7.0. |
| * @param atLeast the version to check against. |
| */ |
| public void setAtLeast(String atLeast) { |
| this.atLeast = atLeast; |
| } |
| |
| /** |
| * Get the exactly attribute. |
| * @return the exactly attribute. |
| */ |
| public String getExactly() { |
| return exactly; |
| } |
| |
| /** |
| * Set the exactly attribute. |
| * This is of the form major.minor.point. |
| * For example 1.7.0. |
| * @param exactly the version to check against. |
| */ |
| public void setExactly(String exactly) { |
| this.exactly = exactly; |
| } |
| |
| /** |
| * Get the name of the property to hold the ant version. |
| * @return the name of the property. |
| */ |
| public String getProperty() { |
| return propertyname; |
| } |
| |
| /** |
| * Set the name of the property to hold the ant version. |
| * @param propertyname the name of the property. |
| */ |
| public void setProperty(String propertyname) { |
| this.propertyname = propertyname; |
| } |
| |
| } |