org.apache.tools.ant.taskdefs.KeySubst Maven / Gradle / Ivy
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/*
* Copyright 2000,2002-2004 The Apache Software Foundation
*
* Licensed 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.Task;
/**
* 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.
*/
public class KeySubst extends Task {
private File source = null;
private File dest = null;
private String sep = "*";
private Hashtable replacements = new Hashtable();
/**
Do the execution.
*/
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) {
ioe.printStackTrace();
} finally {
if (bw != null) {
try {
bw.close();
} catch (IOException e) {
// ignore
}
}
if (br != null) {
try {
br.close();
} catch (IOException e) {
// ignore
}
}
}
}
/**
Set the source file.
*/
public void setSrc(File s) {
this.source = s;
}
/**
Set the destination file.
*/
public void setDest(File dest) {
this.dest = dest;
}
/**
Sets the separator between name=value arguments
in setKeys(). By default it is "*".
*/
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.
*/
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);
}
}
}
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 $",
hash));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
Does replacement on text using the hashtable of keys.
@return the string with the replacements in it.
*/
public static String replace(String origString, Hashtable keys)
throws BuildException {
StringBuffer finalString = new StringBuffer();
int index = 0;
int i = 0;
String key = null;
while ((index = origString.indexOf("${", 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();
}
finalString.append (origString.substring(i));
return finalString.toString();
}
}