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package com.github.javaparser.utils;
/**
* Builds a string containing a list of items with a prefix, a postfix, and a separator.
* <br/>Example: (1,2,3) which has prefix "(", separator ",", postfix ")" and the items 1 through 3.
* <p/>Java 8 offers the very nice Collectors.joining(String, String, String) which does the same thing.
*/
public class SeparatedItemStringBuilder {
private final String separator;
private final String postfix;
private boolean hasItems = false;
private StringBuilder builder;
public SeparatedItemStringBuilder(String prefix, String separator, String postfix) {
builder = new StringBuilder(prefix);
this.separator = separator;
this.postfix = postfix;
}
/**
* Add one item. Either pass a string, or a format for String.format and corresponding arguments.
*/
public SeparatedItemStringBuilder append(CharSequence format, Object... args) {
if (hasItems) {
builder.append(separator);
}
builder.append(String.format(format.toString(), args));
hasItems = true;
return this;
}
public boolean hasItems() {
return hasItems;
}
/**
* Convert the builder into its final string representation.
*/
@Override
public String toString() {
// This order of toStringing avoids debuggers from making a mess.
return builder.toString() + postfix;
}
}
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