com.sun.enterprise.admin.util.ColumnFormatter Maven / Gradle / Ivy
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package com.sun.enterprise.admin.util;
import java.util.ArrayList;
import java.util.List;
/**
*
* @author Tom Mueller
*/
public class ColumnFormatter {
private int numCols = -1;
private String headings[];
private List valList = new ArrayList();
public ColumnFormatter(String headings[]) {
this.headings = headings;
numCols = headings.length;
}
public ColumnFormatter() {
this.headings = null;
}
public void addRow(Object values[]) throws IllegalArgumentException {
// check to make sure the number of columns is the same as what we already have
if (numCols != -1) {
if (values.length != numCols) {
throw new IllegalArgumentException(
Strings.get("column.internal", values.length, numCols));
}
}
numCols = values.length;
String v[] = new String[numCols];
for (int i = 0; i < v.length; i++) {
v[i] = values[i] == null ? "" : values[i].toString();
}
valList.add(v);
}
@Override
public String toString() {
// no data
if (numCols == -1) return "";
int longestValue[] = new int[numCols];
for (String v[] : valList) {
for (int i = 0; i < v.length; i++) {
if (v[i].length() > longestValue[i]) {
longestValue[i] = v[i].length();
}
}
}
StringBuilder formattedLineBuf = new StringBuilder();
for (int i = 0; i < numCols; i++) {
if (headings != null && headings[i].length() > longestValue[i]) {
longestValue[i] = headings[i].length();
}
longestValue[i] += 2;
formattedLineBuf.append("%-")
.append(longestValue[i])
.append("s");
}
String formattedLine = formattedLineBuf.toString();
StringBuilder sb = new StringBuilder();
boolean havePrev = false;
if (headings != null) {
sb.append(String.format(formattedLine, (Object[])headings));
havePrev = true;
}
// no linefeed at the end!!!
for (String v[] : valList) {
if (havePrev) {
sb.append('\n');
}
sb.append(String.format(formattedLine, (Object[])v));
havePrev = true;
}
return sb.toString();
}
}