org.apache.tools.ant.taskdefs.optional.PropertyFile Maven / Gradle / Ivy
/*
* 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.optional;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.util.LayoutPreservingProperties;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.util.FileUtils;
/**
*Modifies settings in a property file.
*
*
*The following is an example of its usage:
*
<target name="setState">
* <property
* name="header"
* value="##Generated file - do not modify!"/>
* <propertyfile file="apropfile.properties" comment="${header}">
* <entry key="product.version.major" type="int" value="5"/>
* <entry key="product.version.minor" type="int" value="0"/>
* <entry key="product.build.major" type="int" value="0" />
* <entry key="product.build.minor" type="int" operation="+" />
* <entry key="product.build.date" type="date" value="now" />
* <entry key="intSet" type="int" operation="=" value="681"/>
* <entry key="intDec" type="int" operation="-"/>
* <entry key="StringEquals" type="string" value="testValue"/>
* </propertyfile>
* </target>
*
*The <propertyfile> task must have:
*
- file
*Other parameters are:
* - comment, key, operation, type and value (the final four being
* eliminated shortly)
*
*The <entry> task must have:
* - key
*Other parameters are:
* - operation
* - type
* - value
* - default
* - unit
*
*
*If type is unspecified, it defaults to string
*
*Parameter values:
* - operation:
* - "=" (set -- default)
* - "-" (dec)
* - "+" (inc)
*
* - type:
* - "int"
* - "date"
* - "string"
*
* - value:
* - holds the default value, if the property
* was not found in property file
* - "now" In case of type "date", the
* value "now" will be replaced by the current
* date/time and used even if a valid date was
* found in the property file.
*
*
*String property types can only use the "=" operation.
*Int property types can only use the "=", "-" or "+" operations.
*
*The message property is used for the property file header, with "\\" being
*a newline delimiter character.
*
*/
public class PropertyFile extends Task {
/* ========================================================================
*
* Instance variables.
*/
// Use this to prepend a message to the properties file
private String comment;
private Properties properties;
private File propertyfile;
private boolean useJDKProperties;
private Vector entries = new Vector();
/* ========================================================================
*
* Constructors
*/
/* ========================================================================
*
* Methods
*/
/**
* Execute the task.
* @throws BuildException on error.
*/
public void execute() throws BuildException {
checkParameters();
readFile();
executeOperation();
writeFile();
}
/**
* The entry nested element.
* @return an entry nested element to be configured.
*/
public Entry createEntry() {
Entry e = new Entry();
entries.addElement(e);
return e;
}
private void executeOperation() throws BuildException {
for (Enumeration e = entries.elements(); e.hasMoreElements();) {
Entry entry = (Entry) e.nextElement();
entry.executeOn(properties);
}
}
private void readFile() throws BuildException {
if (useJDKProperties) {
// user chose to use standard Java properties, which loose
// comments and layout
properties = new Properties();
} else {
properties = new LayoutPreservingProperties();
}
try {
if (propertyfile.exists()) {
log("Updating property file: "
+ propertyfile.getAbsolutePath());
FileInputStream fis = null;
try {
fis = new FileInputStream(propertyfile);
BufferedInputStream bis = new BufferedInputStream(fis);
properties.load(bis);
} finally {
if (fis != null) {
fis.close();
}
}
} else {
log("Creating new property file: "
+ propertyfile.getAbsolutePath());
FileOutputStream out = null;
try {
out = new FileOutputStream(propertyfile.getAbsolutePath());
out.flush();
} finally {
if (out != null) {
out.close();
}
}
}
} catch (IOException ioe) {
throw new BuildException(ioe.toString());
}
}
private void checkParameters() throws BuildException {
if (!checkParam(propertyfile)) {
throw new BuildException("file token must not be null.",
getLocation());
}
}
/**
* Location of the property file to be edited; required.
* @param file the property file.
*/
public void setFile(File file) {
propertyfile = file;
}
/**
* optional header comment for the file
* @param hdr the string to use for the comment.
*/
public void setComment(String hdr) {
comment = hdr;
}
/**
* optional flag to use original Java properties (as opposed to
* layout preserving properties)
*/
public void setJDKProperties(boolean val) {
useJDKProperties = val;
}
private void writeFile() throws BuildException {
// Write to RAM first, as an OOME could otherwise produce a truncated file:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
properties.store(baos, comment);
} catch (IOException x) { // should not happen
throw new BuildException(x, getLocation());
}
try {
OutputStream os = new FileOutputStream(propertyfile);
try {
try {
os.write(baos.toByteArray());
} finally {
os.close();
}
} catch (IOException x) { // possibly corrupt
FileUtils.getFileUtils().tryHardToDelete(propertyfile);
throw x;
}
} catch (IOException x) { // opening, writing, or closing
throw new BuildException(x, getLocation());
}
}
private boolean checkParam(File param) {
return !(param == null);
}
/**
* Instance of this class represents nested elements of
* a task propertyfile.
*/
public static class Entry {
private static final int DEFAULT_INT_VALUE = 0;
private static final String DEFAULT_DATE_VALUE = "now";
private static final String DEFAULT_STRING_VALUE = "";
private String key = null;
private int type = Type.STRING_TYPE;
private int operation = Operation.EQUALS_OPER;
private String value = null;
private String defaultValue = null;
private String newValue = null;
private String pattern = null;
private int field = Calendar.DATE;
/**
* Name of the property name/value pair
* @param value the key.
*/
public void setKey(String value) {
this.key = value;
}
/**
* Value to set (=), to add (+) or subtract (-)
* @param value the value.
*/
public void setValue(String value) {
this.value = value;
}
/**
* operation to apply.
* "+" or "="
*(default) for all datatypes; "-" for date and int only)\.
* @param value the operation enumerated value.
*/
public void setOperation(Operation value) {
this.operation = Operation.toOperation(value.getValue());
}
/**
* Regard the value as : int, date or string (default)
* @param value the type enumerated value.
*/
public void setType(Type value) {
this.type = Type.toType(value.getValue());
}
/**
* Initial value to set for a property if it is not
* already defined in the property file.
* For type date, an additional keyword is allowed: "now"
* @param value the default value.
*/
public void setDefault(String value) {
this.defaultValue = value;
}
/**
* For int and date type only. If present, Values will
* be parsed and formatted accordingly.
* @param value the pattern to use.
*/
public void setPattern(String value) {
this.pattern = value;
}
/**
* The unit of the value to be applied to date +/- operations.
* Valid Values are:
*
* - millisecond
* - second
* - minute
* - hour
* - day (default)
* - week
* - month
* - year
*
* This only applies to date types using a +/- operation.
* @param unit the unit enumerated value.
* @since Ant 1.5
*/
public void setUnit(PropertyFile.Unit unit) {
field = unit.getCalendarField();
}
/**
* Apply the nested element to the properties.
* @param props the properties to apply the entry on.
* @throws BuildException if there is an error.
*/
protected void executeOn(Properties props) throws BuildException {
checkParameters();
if (operation == Operation.DELETE_OPER) {
props.remove(key);
return;
}
// type may be null because it wasn't set
String oldValue = (String) props.get(key);
try {
if (type == Type.INTEGER_TYPE) {
executeInteger(oldValue);
} else if (type == Type.DATE_TYPE) {
executeDate(oldValue);
} else if (type == Type.STRING_TYPE) {
executeString(oldValue);
} else {
throw new BuildException("Unknown operation type: "
+ type);
}
} catch (NullPointerException npe) {
// Default to string type
// which means do nothing
npe.printStackTrace();
}
if (newValue == null) {
newValue = "";
}
// Insert as a string by default
props.put(key, newValue);
}
/**
* Handle operations for type date.
*
* @param oldValue the current value read from the property file or
* null if the key was
* not contained in the property file.
*/
private void executeDate(String oldValue) throws BuildException {
Calendar currentValue = Calendar.getInstance();
if (pattern == null) {
pattern = "yyyy/MM/dd HH:mm";
}
DateFormat fmt = new SimpleDateFormat(pattern);
String currentStringValue = getCurrentValue(oldValue);
if (currentStringValue == null) {
currentStringValue = DEFAULT_DATE_VALUE;
}
if ("now".equals(currentStringValue)) {
currentValue.setTime(new Date());
} else {
try {
currentValue.setTime(fmt.parse(currentStringValue));
} catch (ParseException pe) {
// swallow
}
}
if (operation != Operation.EQUALS_OPER) {
int offset = 0;
try {
offset = Integer.parseInt(value);
if (operation == Operation.DECREMENT_OPER) {
offset = -1 * offset;
}
} catch (NumberFormatException e) {
throw new BuildException("Value not an integer on " + key);
}
currentValue.add(field, offset);
}
newValue = fmt.format(currentValue.getTime());
}
/**
* Handle operations for type int.
*
* @param oldValue the current value read from the property file or
* null if the key was
* not contained in the property file.
*/
private void executeInteger(String oldValue) throws BuildException {
int currentValue = DEFAULT_INT_VALUE;
int newV = DEFAULT_INT_VALUE;
DecimalFormat fmt = (pattern != null) ? new DecimalFormat(pattern)
: new DecimalFormat();
try {
String curval = getCurrentValue(oldValue);
if (curval != null) {
currentValue = fmt.parse(curval).intValue();
} else {
currentValue = 0;
}
} catch (NumberFormatException nfe) {
// swallow
} catch (ParseException pe) {
// swallow
}
if (operation == Operation.EQUALS_OPER) {
newV = currentValue;
} else {
int operationValue = 1;
if (value != null) {
try {
operationValue = fmt.parse(value).intValue();
} catch (NumberFormatException nfe) {
// swallow
} catch (ParseException pe) {
// swallow
}
}
if (operation == Operation.INCREMENT_OPER) {
newV = currentValue + operationValue;
} else if (operation == Operation.DECREMENT_OPER) {
newV = currentValue - operationValue;
}
}
this.newValue = fmt.format(newV);
}
/**
* Handle operations for type string.
*
* @param oldValue the current value read from the property file or
* null if the key was
* not contained in the property file.
*/
private void executeString(String oldValue) throws BuildException {
String newV = DEFAULT_STRING_VALUE;
String currentValue = getCurrentValue(oldValue);
if (currentValue == null) {
currentValue = DEFAULT_STRING_VALUE;
}
if (operation == Operation.EQUALS_OPER) {
newV = currentValue;
} else if (operation == Operation.INCREMENT_OPER) {
newV = currentValue + value;
}
this.newValue = newV;
}
/**
* Check if parameter combinations can be supported
* @todo make sure the 'unit' attribute is only specified on date
* fields
*/
private void checkParameters() throws BuildException {
if (type == Type.STRING_TYPE
&& operation == Operation.DECREMENT_OPER) {
throw new BuildException("- is not supported for string "
+ "properties (key:" + key + ")");
}
if (value == null && defaultValue == null && operation != Operation.DELETE_OPER) {
throw new BuildException("\"value\" and/or \"default\" "
+ "attribute must be specified (key:" + key + ")");
}
if (key == null) {
throw new BuildException("key is mandatory");
}
if (type == Type.STRING_TYPE && pattern != null) {
throw new BuildException("pattern is not supported for string "
+ "properties (key:" + key + ")");
}
}
private String getCurrentValue(String oldValue) {
String ret = null;
if (operation == Operation.EQUALS_OPER) {
// If only value is specified, the property is set to it
// regardless of its previous value.
if (value != null && defaultValue == null) {
ret = value;
}
// If only default is specified and the property previously
// existed in the property file, it is unchanged.
if (value == null && defaultValue != null && oldValue != null) {
ret = oldValue;
}
// If only default is specified and the property did not
// exist in the property file, the property is set to default.
if (value == null && defaultValue != null && oldValue == null) {
ret = defaultValue;
}
// If value and default are both specified and the property
// previously existed in the property file, the property
// is set to value.
if (value != null && defaultValue != null && oldValue != null) {
ret = value;
}
// If value and default are both specified and the property
// did not exist in the property file, the property is set
// to default.
if (value != null && defaultValue != null && oldValue == null) {
ret = defaultValue;
}
} else {
ret = (oldValue == null) ? defaultValue : oldValue;
}
return ret;
}
/**
* Enumerated attribute with the values "+", "-", "="
*/
public static class Operation extends EnumeratedAttribute {
// Property type operations
/** + */
public static final int INCREMENT_OPER = 0;
/** - */
public static final int DECREMENT_OPER = 1;
/** = */
public static final int EQUALS_OPER = 2;
/** del */
public static final int DELETE_OPER = 3;
/** {@inheritDoc}. */
public String[] getValues() {
return new String[] {"+", "-", "=", "del"};
}
/**
* Convert string to index.
* @param oper the string to convert.
* @return the index.
*/
public static int toOperation(String oper) {
if ("+".equals(oper)) {
return INCREMENT_OPER;
} else if ("-".equals(oper)) {
return DECREMENT_OPER;
} else if ("del".equals(oper)) {
return DELETE_OPER;
}
return EQUALS_OPER;
}
}
/**
* Enumerated attribute with the values "int", "date" and "string".
*/
public static class Type extends EnumeratedAttribute {
// Property types
/** int */
public static final int INTEGER_TYPE = 0;
/** date */
public static final int DATE_TYPE = 1;
/** string */
public static final int STRING_TYPE = 2;
/** {@inheritDoc} */
public String[] getValues() {
return new String[] {"int", "date", "string"};
}
/**
* Convert string to index.
* @param type the string to convert.
* @return the index.
*/
public static int toType(String type) {
if ("int".equals(type)) {
return INTEGER_TYPE;
} else if ("date".equals(type)) {
return DATE_TYPE;
}
return STRING_TYPE;
}
}
}
/**
* Borrowed from Tstamp
* @todo share all this time stuff across many tasks as a datetime datatype
* @since Ant 1.5
*/
public static class Unit extends EnumeratedAttribute {
private static final String MILLISECOND = "millisecond";
private static final String SECOND = "second";
private static final String MINUTE = "minute";
private static final String HOUR = "hour";
private static final String DAY = "day";
private static final String WEEK = "week";
private static final String MONTH = "month";
private static final String YEAR = "year";
private static final String[] UNITS
= {MILLISECOND, SECOND, MINUTE, HOUR,
DAY, WEEK, MONTH, YEAR };
private Map calendarFields = new HashMap();
/** no arg constructor */
public Unit() {
calendarFields.put(MILLISECOND,
new Integer(Calendar.MILLISECOND));
calendarFields.put(SECOND, new Integer(Calendar.SECOND));
calendarFields.put(MINUTE, new Integer(Calendar.MINUTE));
calendarFields.put(HOUR, new Integer(Calendar.HOUR_OF_DAY));
calendarFields.put(DAY, new Integer(Calendar.DATE));
calendarFields.put(WEEK, new Integer(Calendar.WEEK_OF_YEAR));
calendarFields.put(MONTH, new Integer(Calendar.MONTH));
calendarFields.put(YEAR, new Integer(Calendar.YEAR));
}
/**
* Convert the value to a Calendar field index.
* @return the calander value.
*/
public int getCalendarField() {
String key = getValue().toLowerCase();
Integer i = (Integer) calendarFields.get(key);
return i.intValue();
}
/** {@inheritDoc}. */
public String[] getValues() {
return UNITS;
}
}
}