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/*
* 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());
}
}
/**
* Evaluate 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;
}
}
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