/*
* 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.karaf.shell.support;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.karaf.shell.api.console.CommandLoggingFilter;
/**
*
*/
public class RegexCommandLoggingFilter implements CommandLoggingFilter {
public static final String DEFAULT_REPLACEMENT = "*****";
private static class ReplaceRegEx {
private Pattern pattern;
private int group=1;
private String replacement;
public ReplaceRegEx(String pattern, int group, String replacement) {
this.pattern = Pattern.compile(";* *"+pattern);
this.group = group;
this.replacement = replacement;
}
public CharSequence filter(CharSequence command) {
Matcher m = pattern.matcher(command);
int offset = 0;
while( m.find() ) {
int origLen = command.length();
command = new StringBuilder(command).replace(m.start(group)+offset, m.end(group)+offset, replacement).toString();
offset += command.length() - origLen;
}
return command;
}
}
private String pattern;
private int group=1;
private String replacement=DEFAULT_REPLACEMENT;
ArrayList<ReplaceRegEx> regexs = new ArrayList<ReplaceRegEx>();
public CharSequence filter(CharSequence command) {
if( pattern!=null ) {
command = new ReplaceRegEx(pattern, group, replacement).filter(command);
}
for (ReplaceRegEx regex : regexs) {
command = regex.filter(command);
}
return command;
}
public void addRegEx(String pattern) {
addRegEx(pattern, 1);
}
public void addRegEx(String pattern, int group) {
addRegEx(pattern, group, DEFAULT_REPLACEMENT);
}
public void addRegEx(String pattern, int group, String replacement) {
regexs.add(new ReplaceRegEx(pattern, group, replacement));
}
public void addCommandOption(String option, String...commands) {
String pattern = "(";
for (String command : commands) {
if( pattern.length() > 1 ) {
pattern += "|";
}
pattern += Pattern.quote(command);
}
pattern += ") +.*?"+Pattern.quote(option)+" +([^ ]+)";
regexs.add(new ReplaceRegEx(pattern, 2, DEFAULT_REPLACEMENT));
}
public String getPattern() {
return pattern;
}
public void setPattern(String pattern) {
this.pattern = pattern;
}
public String getReplacement() {
return replacement;
}
public void setReplacement(String replacement) {
this.replacement = replacement;
}
public int getGroup() {
return group;
}
public void setGroup(int group) {
this.group = group;
}
}