/*
* 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.openejb.server.cli.command;
import org.apache.openejb.loader.IO;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Command(name = "part", usage = "part <first line>-<last line> <path>", description = "print the specified line range of a file (in tomee directories only)")
public class PartCommand extends PathCommand {
private static final Pattern PATTERN = Pattern.compile("([0-9]*)-([0-9]*) (.*)");
@Override
public void execute(final String cmd) {
final Matcher matcher = PATTERN.matcher(cmd);
if (!matcher.matches()) {
streamManager.writeErr("you have to specify a numbe of line, please see help for more information");
return;
}
int firstLine;
int secondLine;
try {
firstLine = getInt(matcher.group(1));
secondLine = getInt(matcher.group(2));
} catch (NumberFormatException nfe) {
streamManager.writeErr("line number was not parsable");
return;
}
final String path = matcher.group(3);
final File file;
try {
file = resolve(path);
} catch (IllegalArgumentException iae) {
streamManager.writeErr(iae.getMessage());
return;
}
if (file.isDirectory() && file.exists()) {
streamManager.writeOut("file " + file.getPath() + " is a directory, please specify a regular file");
} else if (file.exists()) {
try {
part(file, firstLine, secondLine);
} catch (IOException e) {
streamManager.writeErr(e);
}
} else {
streamManager.writeOut("file " + file.getPath() + " doesn't exist");
}
}
private int getInt(String group) {
try {
return Integer.parseInt(group);
} catch (NumberFormatException nfe) {
streamManager.writeErr("line number should be an integer");
throw nfe;
}
}
private void part(final File file, int firstLine, int secondLine) throws IOException {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
int totalLineNumber = 0;
try {
while (br.readLine() != null) {
totalLineNumber++;
}
} finally {
IO.close(br);
}
br = new BufferedReader(new FileReader(file));
try {
int firstLineToPrint = Math.max(1, firstLine);
int lastLine = Math.min(totalLineNumber, secondLine);
totalLineNumber = 0;
while ((line = br.readLine()) != null) {
totalLineNumber++;
if (totalLineNumber >= firstLineToPrint && totalLineNumber <= lastLine) {
streamManager.writeOut(String.format("%3d. %s", totalLineNumber, line));
}
if (totalLineNumber > lastLine) {
break;
}
}
} finally {
IO.close(br);
}
}
}