org.apache.tools.ant.taskdefs.KeySubst 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;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Hashtable;
import java.util.StringTokenizer;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.util.StringUtils;
/**
* Keyword substitution. Input file is written to output file.
* Do not make input file same as output file.
* Keywords in input files look like this: @foo@. See the docs for the
* setKeys method to understand how to do the substitutions.
*
* @since Ant 1.1
* @deprecated KeySubst is deprecated since Ant 1.1. Use Filter + Copy
* instead.
*/
@Deprecated
public class KeySubst extends Task {
private File source = null;
private File dest = null;
private String sep = "*";
private Hashtable replacements = new Hashtable();
/**
* Do the execution.
* @throws BuildException on error
*/
public void execute() throws BuildException {
log("!! KeySubst is deprecated. Use Filter + Copy instead. !!");
log("Performing Substitutions");
if (source == null || dest == null) {
log("Source and destinations must not be null");
return;
}
BufferedReader br = null;
BufferedWriter bw = null;
try {
br = new BufferedReader(new FileReader(source));
dest.delete();
bw = new BufferedWriter(new FileWriter(dest));
String line = null;
String newline = null;
line = br.readLine();
while (line != null) {
if (line.length() == 0) {
bw.newLine();
} else {
newline = KeySubst.replace(line, replacements);
bw.write(newline);
bw.newLine();
}
line = br.readLine();
}
bw.flush();
} catch (IOException ioe) {
log(StringUtils.getStackTrace(ioe), Project.MSG_ERR);
} finally {
FileUtils.close(bw);
FileUtils.close(br);
}
}
/**
* Set the source file.
* @param s the source file
*/
public void setSrc(File s) {
this.source = s;
}
/**
* Set the destination file.
* @param dest the destination file
*/
public void setDest(File dest) {
this.dest = dest;
}
/**
* Sets the separator between name=value arguments
* in setKeys(). By default it is "*".
* @param sep the separator string
*/
public void setSep(String sep) {
this.sep = sep;
}
/**
* Sets the keys.
*
* Format string is like this:
*
* name=value*name2=value
*
* Names are case sensitive.
*
* Use the setSep() method to change the * to something else
* if you need to use * as a name or value.
* @param keys a String value
*/
public void setKeys(String keys) {
if (keys != null && keys.length() > 0) {
StringTokenizer tok =
new StringTokenizer(keys, this.sep, false);
while (tok.hasMoreTokens()) {
String token = tok.nextToken().trim();
StringTokenizer itok =
new StringTokenizer(token, "=", false);
String name = itok.nextToken();
String value = itok.nextToken();
replacements.put(name, value);
}
}
}
/**
* A test method.
* @param args not used
*/
public static void main(String[] args) {
try {
Hashtable hash = new Hashtable();
hash.put("VERSION", "1.0.3");
hash.put("b", "ffff");
System.out.println(KeySubst.replace("$f ${VERSION} f ${b} jj $",
hash));
} catch (Exception e) {
e.printStackTrace(); //NOSONAR
}
}
/**
* Does replacement on text using the hashtable of keys.
* @param origString an input string
* @param keys mapping of keys to values
* @return the string with the replacements in it.
* @throws BuildException on error
*/
public static String replace(String origString, Hashtable keys)
throws BuildException {
StringBuffer finalString = new StringBuffer();
int index = 0;
int i = 0;
String key = null;
// CheckStyle:MagicNumber OFF
while ((index = origString.indexOf("${", i)) > -1) {
key = origString.substring(index + 2, origString.indexOf("}",
index + 3));
finalString.append(origString.substring(i, index));
if (keys.containsKey(key)) {
finalString.append(keys.get(key));
} else {
finalString.append("${");
finalString.append(key);
finalString.append("}");
}
i = index + 3 + key.length();
}
// CheckStyle:MagicNumber ON
finalString.append(origString.substring(i));
return finalString.toString();
}
}