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package com.paypal.butterfly.utilities.operations.text;
import java.io.Writer;
/**
* Removes one, or more, lines from a text file.
* The line to be removed is chosen either based on a regular
* expression, or by the line number.
*
* If the regular expression
* is set, only the first line found to match it will be removed,
* unless {@link #setFirstOnly(boolean)} is set to false, then
* all lines that match it will be removed.
*
* If a regular expression and a line number are both set,
* the line number will take precedence, and the regular expression
* will be ignored
*
* @author facarvalho
*/
public class RemoveLine extends AbstractLineOperation {
private static final String DESCRIPTION = "Remove line(s) from file %s";
private static final String MANIPULATION_WORD = "removed";
/**
* Operation to remove one, or more, lines from a text file.
* The line to be removed is chosen either based on a regular
* expression, or by the line number.
*
* If the regular expression
* is set, only the first found to match it will be removed,
* unless {@link #setFirstOnly(boolean)} is set to false, then
* all lines that match it will be removed.
*
* If a regular expression and a line number are both set,
* the line number will take precedence, and the regular expression
* will be ignored
*/
public RemoveLine() {
super();
manipulationWord = MANIPULATION_WORD;
}
/**
* Operation to remove one, or more, lines from a text file.
* The line to be removed is chosen either based on a regular
* expression, or by the line number.
*
* If the regular expression
* is set, only the first found to match it will be removed,
* unless {@link #setFirstOnly(boolean)} is set to false, then
* all lines that match it will be removed.
*
* If a regular expression and a line number are both set,
* the line number will take precedence, and the regular expression
* will be ignored
*
* @param regex the regular expression to identify the line(s) to be removed
*/
public RemoveLine(String regex) {
super(regex);
manipulationWord = MANIPULATION_WORD;
}
/**
* Operation to remove one, or more, lines from a text file.
* The line to be removed is chosen either based on a regular
* expression, or by the line number.
*
* If the regular expression
* is set, only the first found to match it will be removed,
* unless {@link #setFirstOnly(boolean)} is set to false, then
* all lines that match it will be removed.
*
* If a regular expression and a line number are both set,
* the line number will take precedence, and the regular expression
* will be ignored
*
* @param regex the regular expression to identify the line(s) to be removed
* @param firstOnly if true, only the first line found (from top down) to match
* the regular expression will be removed. If false, all of them
* will
*/
public RemoveLine(String regex, boolean firstOnly) {
super(regex, firstOnly);
manipulationWord = MANIPULATION_WORD;
}
/**
* Operation to remove one line from a text file, based on a
* line number.
*
* @param lineNumber the number of the line to be removed
*/
public RemoveLine(Integer lineNumber) {
setLineNumber(lineNumber);
}
@Override
protected boolean manipulateLine(String lineToBeManipulated, Writer writer) {
return false;
}
@Override
public String getDescription() {
return String.format(DESCRIPTION, getRelativePath());
}
}
