/**
* Copyright (C) 2011 K Venkata Sudhakar <kvenkatasudhakar@gmail.com>
*
* Licensed 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.camunda.bpm.extension.osgi.commands.asciitable;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
/**
* This implementation builds the header and data rows
* by considering each column one by one in the format of 'FFFF...' (border format).
* While rendering the last column, it closes the table.
* It takes <max_length_string_in_each_column>+3 characters to render each column.
* These three characters include two white spaces at left and right side of
* the max length string in the column and one char(|) for table formatting.
*
* @author K Venkata Sudhakar (kvenkatasudhakar@gmail.com)
* @version 1.0
*/
public class SimpleASCIITableImpl implements IASCIITable {
@Override
public void printTable(String[] header, String[][] data) {
printTable(header, DEFAULT_HEADER_ALIGN, data, DEFAULT_DATA_ALIGN);
}
@Override
public void printTable(String[] header, String[][] data, int dataAlign) {
printTable(header, DEFAULT_HEADER_ALIGN, data, dataAlign);
}
@Override
public void printTable(String[] header, int headerAlign, String[][] data, int dataAlign) {
System.out.println(getTable(header, headerAlign, data, dataAlign));
}
@Override
public String getTable(String[] header, String[][] data) {
return getTable(header, DEFAULT_HEADER_ALIGN, data, DEFAULT_DATA_ALIGN);
}
@Override
public String getTable(String[] header, String[][] data, int dataAlign) {
return getTable(header, DEFAULT_HEADER_ALIGN, data, dataAlign);
}
@Override
public String getTable(String[] header, int headerAlign, String[][] data, int dataAlign) {
ASCIITableHeader[] headerObjs = new ASCIITableHeader[0];
if (header != null && header.length > 0) {
headerObjs = new ASCIITableHeader[header.length];
for (int i = 0; i < header.length; i++) {
headerObjs[i] = new ASCIITableHeader(header[i], dataAlign, headerAlign);
}
}
return getTable(headerObjs, data);
}
public void printTable(ASCIITableHeader[] headerObjs, String[][] data) {
System.out.println(getTable(headerObjs, data));
}
@Override
public String getTable(IASCIITableAware asciiTableAware) {
ASCIITableHeader[] headerObjs = new ASCIITableHeader[0];
String[][] data = new String[0][0];
List<Object> rowData = null;
ASCIITableHeader colHeader = null;
Vector<String> rowTransData = null;
String[] rowContent = null;
String cellData = null;
if (asciiTableAware != null) {
/**
* Get the row header.
*/
if (asciiTableAware.getHeaders() != null &&
!asciiTableAware.getHeaders().isEmpty()) {
headerObjs = new ASCIITableHeader[asciiTableAware.getHeaders().size()];
for (int i = 0; i < asciiTableAware.getHeaders().size(); i++) {
headerObjs[i] = asciiTableAware.getHeaders().get(i);
}
}
/**
* Get the data.
*/
if (asciiTableAware.getData() != null && !asciiTableAware.getData().isEmpty()) {
data = new String[asciiTableAware.getData().size()][];
for (int i = 0; i < asciiTableAware.getData().size(); i++) {
//Get the row data
rowData = asciiTableAware.getData().get(i);
rowTransData = new Vector<String>(rowData.size());
//Transform each cell in the row
for (int j = 0; j < rowData.size(); j++) {
//Get header associated with this cell
colHeader = j < headerObjs.length ? headerObjs[j] : null;
//Transform the data using the transformation function provided.
cellData = asciiTableAware.formatData(colHeader, i, j, rowData.get(j));
if (cellData == null) {
cellData = String.valueOf(rowData.get(j));
}
rowTransData.add(cellData);
}//iterate all columns
//Set the transformed content
rowContent = new String[rowTransData.size()];
rowTransData.copyInto(rowContent);
data[i] = rowContent;
}//iterate all rows
}//end data
}
return getTable(headerObjs, data);
}
@Override
public void printTable(IASCIITableAware asciiTableAware) {
System.out.println(getTable(asciiTableAware));
}
public String getTable(ASCIITableHeader[] headerObjs, String[][] data) {
if (data == null) {
throw new IllegalArgumentException("Please provide valid data : " + data);
}
/**
* Table String buffer
*/
StringBuilder tableBuf = new StringBuilder();
/**
* Get maximum number of columns across all rows
*/
String[] header = getHeaders(headerObjs);
int colCount = getMaxColumns(header, data);
/**
* Get max length of data in each column
*/
List<Integer> colMaxLenList = getMaxColLengths(colCount, header, data);
/**
* Check for the existence of header
*/
if (header != null && header.length > 0) {
/**
* 1. Row line
*/
tableBuf.append(getRowLineBuf(colCount, colMaxLenList, data));
/**
* 2. Header line
*/
tableBuf.append(getRowDataBuf(colCount, colMaxLenList, header, headerObjs, true));
}
/**
* 3. Data Row lines
*/
tableBuf.append(getRowLineBuf(colCount, colMaxLenList, data));
String[] rowData = null;
//Build row data buffer by iterating through all rows
for (int i = 0; i < data.length; i++) {
//Build cell data in each row
rowData = new String[colCount];
for (int j = 0; j < colCount; j++) {
if (j < data[i].length) {
rowData[j] = data[i][j];
} else {
rowData[j] = "";
}
}
tableBuf.append(getRowDataBuf(colCount, colMaxLenList, rowData, headerObjs, false));
}
/**
* 4. Row line
*/
tableBuf.append(getRowLineBuf(colCount, colMaxLenList, data));
return tableBuf.toString();
}
private String getRowDataBuf(int colCount, List<Integer> colMaxLenList,
String[] row, ASCIITableHeader[] headerObjs, boolean isHeader) {
StringBuilder rowBuilder = new StringBuilder();
String formattedData = null;
int align;
for (int i = 0; i < colCount; i++) {
align = isHeader ? DEFAULT_HEADER_ALIGN : DEFAULT_DATA_ALIGN;
if (headerObjs != null && i < headerObjs.length) {
if (isHeader) {
align = headerObjs[i].getHeaderAlign();
} else {
align = headerObjs[i].getDataAlign();
}
}
formattedData = i < row.length ? row[i] : "";
//format = "| %" + colFormat.get(i) + "s ";
formattedData = "| " +
getFormattedData(colMaxLenList.get(i), formattedData, align) + " ";
if (i + 1 == colCount) {
formattedData += "|";
}
rowBuilder.append(formattedData);
}
return rowBuilder.append("\n").toString();
}
private String getFormattedData(int maxLength, String data, int align) {
if (data == null) {
data = "<null>";
}
if (data.length() > maxLength) {
return data;
}
boolean toggle = true;
while (data.length() < maxLength) {
if (align == ALIGN_LEFT) {
data = data + " ";
} else if (align == ALIGN_RIGHT) {
data = " " + data;
} else if (align == ALIGN_CENTER) {
if (toggle) {
data = " " + data;
toggle = false;
} else {
data = data + " ";
toggle = true;
}
}
}
return data;
}
/**
* Each string item rendering requires the border and a space on both sides.
* <p/>
* 12 3 12 3 12 34
* +----- +-------- +------+
* abc venkat last
*
* @param colCount
* @param colMaxLenList
* @param data
* @return
*/
private String getRowLineBuf(int colCount, List<Integer> colMaxLenList, String[][] data) {
StringBuilder rowBuilder = new StringBuilder();
int colWidth = 0;
for (int i = 0; i < colCount; i++) {
colWidth = colMaxLenList.get(i) + 3;
for (int j = 0; j < colWidth; j++) {
if (j == 0) {
rowBuilder.append("+");
} else if ((i + 1 == colCount && j + 1 == colWidth)) {//for last column close the border
rowBuilder.append("-+");
} else {
rowBuilder.append("-");
}
}
}
return rowBuilder.append("\n").toString();
}
private int getMaxItemLength(List<String> colData) {
int maxLength = 0;
for (int i = 0; i < colData.size(); i++) {
maxLength = Math.max((colData.get(i) == null ? 6 : colData.get(i).length()), maxLength);
}
return maxLength;
}
private int getMaxColumns(String[] header, String[][] data) {
int maxColumns = 0;
for (int i = 0; i < data.length; i++) {
maxColumns = Math.max(data[i].length, maxColumns);
}
maxColumns = Math.max(header.length, maxColumns);
return maxColumns;
}
private List<Integer> getMaxColLengths(int colCount, String[] header, String[][] data) {
List<Integer> colMaxLenList = new ArrayList<Integer>(colCount);
List<String> colData = null;
int maxLength;
for (int i = 0; i < colCount; i++) {
colData = new ArrayList<String>();
if (header != null && i < header.length) {
colData.add(header[i]);
}
for (int j = 0; j < data.length; j++) {
if (i < data[j].length) {
colData.add(data[j][i]);
} else {
colData.add("");
}
}
maxLength = getMaxItemLength(colData);
colMaxLenList.add(maxLength);
}
return colMaxLenList;
}
private String[] getHeaders(ASCIITableHeader[] headerObjs) {
String[] header = new String[0];
if (headerObjs != null && headerObjs.length > 0) {
header = new String[headerObjs.length];
for (int i = 0; i < headerObjs.length; i++) {
header[i] = headerObjs[i].getHeaderName();
}
}
return header;
}
}