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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 java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.taskdefs.Touch;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.types.Resource;
/**
* Condition that makes assertions about the last modified date of a
* resource.
*
* @since Ant 1.8.0
*/
public class IsLastModified extends ProjectComponent implements Condition {
private long millis = -1;
private String dateTime = null;
private Touch.DateFormatFactory dfFactory = Touch.DEFAULT_DF_FACTORY;
private Resource resource;
private CompareMode mode = CompareMode.EQUALS;
/**
* Set the new modification time of file(s) touched
* in milliseconds since midnight Jan 1 1970.
* @param millis the <code>long</code> timestamp to use.
*/
public void setMillis(long millis) {
this.millis = millis;
}
/**
* Set the new modification time of file(s) touched
* in the format "MM/DD/YYYY HH:MM AM <i>or</i> PM"
* or "MM/DD/YYYY HH:MM:SS AM <i>or</i> PM".
* @param dateTime the <code>String</code> date in the specified format.
*/
public void setDatetime(String dateTime) {
this.dateTime = dateTime;
}
/**
* Set the format of the datetime attribute.
* @param pattern the <code>SimpleDateFormat</code>-compatible
* format pattern.
*/
public void setPattern(final String pattern) {
dfFactory = new Touch.DateFormatFactory() {
public DateFormat getPrimaryFormat() {
return new SimpleDateFormat(pattern);
}
public DateFormat getFallbackFormat() {
return null;
}
};
}
/**
* The resource to test.
* @param r the resource to test
*/
public void add(Resource r) {
if (resource != null) {
throw new BuildException("only one resource can be tested");
}
resource = r;
}
/**
* The type of comparison to test.
* @param mode the mode of comparison.
*/
public void setMode(CompareMode mode) {
this.mode = mode;
}
/**
* Argument validation.
* @throws BuildException if the required attributes are not supplied or
* if there is an inconsistency in the attributes.
*/
protected void validate() throws BuildException {
if (millis >= 0 && dateTime != null) {
throw new BuildException("Only one of dateTime and millis can be"
+ " set");
}
if (millis < 0 && dateTime == null) {
throw new BuildException("millis or dateTime is required");
}
if (resource == null) {
throw new BuildException("resource is required");
}
}
/**
* Calculate timestamp as millis either based on millis or
* dateTime (and pattern) attribute.
* @return time in milliseconds
* @throws BuildException if the date cannot be parsed.
*/
protected long getMillis() throws BuildException {
if (millis >= 0) {
return millis;
}
if ("now".equalsIgnoreCase(dateTime)) {
return System.currentTimeMillis();
}
DateFormat df = dfFactory.getPrimaryFormat();
ParseException pe = null;
try {
return df.parse(dateTime).getTime();
} catch (ParseException peOne) {
df = dfFactory.getFallbackFormat();
if (df == null) {
pe = peOne;
} else {
try {
return df.parse(dateTime).getTime();
} catch (ParseException peTwo) {
pe = peTwo;
}
}
}
if (pe != null) {
throw new BuildException(pe.getMessage(), pe, getLocation());
}
/* NOTREACHED */
return 0;
}
/**
* evaluate the condition
* @return true or false depending on the compoarison mode and the time of the resource
* @throws BuildException
*/
public boolean eval() throws BuildException {
validate();
long expected = getMillis();
long actual = resource.getLastModified();
log("expected timestamp: " + expected + " (" + new Date(expected) + ")"
+ ", actual timestamp: " + actual + " (" + new Date(actual) + ")" ,
Project.MSG_VERBOSE);
if (CompareMode.EQUALS_TEXT.equals(mode.getValue())) {
return expected == actual;
}
if (CompareMode.BEFORE_TEXT.equals(mode.getValue())) {
return expected > actual;
}
if (CompareMode.NOT_BEFORE_TEXT.equals(mode.getValue())) {
return expected <= actual;
}
if (CompareMode.AFTER_TEXT.equals(mode.getValue())) {
return expected < actual;
}
if (CompareMode.NOT_AFTER_TEXT.equals(mode.getValue())) {
return expected >= actual;
}
throw new BuildException("Unknown mode " + mode.getValue());
}
/**
* describes comparison modes.
*/
public static class CompareMode extends EnumeratedAttribute {
private static final String EQUALS_TEXT = "equals";
private static final String BEFORE_TEXT = "before";
private static final String AFTER_TEXT = "after";
private static final String NOT_BEFORE_TEXT = "not-before";
private static final String NOT_AFTER_TEXT = "not-after";
private static final CompareMode EQUALS = new CompareMode(EQUALS_TEXT);
/**
* creates a CompareMode instance of type equals
*/
public CompareMode() {
this(EQUALS_TEXT);
}
/**
* creates a comparemode instance
* @param s one of the authorized values for comparemode
*/
public CompareMode(String s) {
super();
setValue(s);
}
public String[] getValues() {
return new String[] {
EQUALS_TEXT, BEFORE_TEXT, AFTER_TEXT, NOT_BEFORE_TEXT,
NOT_AFTER_TEXT,
};
}
}
}
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