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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.geode.management.internal.cli.result;
/**
* Helper class to build rows of columnized strings & build a table from those rows.
*
* Sample usage:
*
*
* public final Table createTable() {
* Table resultTable = TableBuilder.newTable();
* resultTable.setColumnSeparator(" | ");
*
* resultTable.newBlankRow();
* resultTable.newRow().newLeftCol("Displaying all fields for member: " + memberName);
* resultTable.newBlankRow();
* RowGroup rowGroup = resultTable.newRowGroup();
* rowGroup.newRow().newCenterCol("FIELD1").newCenterCol("FIELD2");
* rowGroup.newRowSeparator('-');
* for (int i = 0; i < counter; i++) {
* rowGroup.newRow().newLeftCol(myFirstField[i]).newLeftCol(mySecondField[i]);
* }
* resultTable.newBlankRow();
*
* return resultTable;
* }
*
*
* Will result in this:
*
*
*
* Displaying all fields for member: Member1
*
* FIELD1 | FIELD2 -------------- | --------------- My First Field | My Second Field Another Fld1 |
* Another Fld2 Last Fld1 | Last Fld2
*
*
*
*
* @since GemFire 7.0
*/
import java.util.ArrayList;
import java.util.List;
import org.apache.geode.management.internal.cli.GfshParser;
import org.apache.geode.management.internal.cli.shell.Gfsh;
public class TableBuilder {
public static Table newTable() {
return new Table();
}
public static class Table {
private final List rowGroups = new ArrayList();
private String columnSeparator = " ";
private boolean isTabularResult = false;
public void setTabularResult(boolean isTabularResult) {
this.isTabularResult = isTabularResult;
}
public void setColumnSeparator(final String columnSeparator) {
this.columnSeparator = columnSeparator;
}
public String getColumnSeparator() {
return this.columnSeparator;
}
public RowGroup newRowGroup() {
RowGroup rowGroup = new RowGroup(this);
this.rowGroups.add(rowGroup);
return rowGroup;
}
public Row newRow() {
RowGroup rowGroup = newRowGroup();
return rowGroup.newRow();
}
public void newBlankRow() {
RowGroup rowGroup = newRowGroup();
rowGroup.newBlankRow();
}
public RowGroup getLastRowGroup() {
if (rowGroups.size() == 0) {
return null;
}
return rowGroups.get(rowGroups.size() - 1);
}
/**
* Computes total Max Row Length across table - for all row groups.
*/
private int getMaxLength() {
int rowGroupMaxTotalLength = 0;
for (RowGroup rowGroup : this.rowGroups) {
List rows = rowGroup.rows;
int rowGroupTotalLength = 0;
int rowMaxTotalLength = 0;
for (Row row : rows) {
int rowTotalLength = 0;
for (int i = 0; i < row.getNumCols(); i++) {
rowTotalLength += row.getMaxColLength(i);
}
if (rowGroup.getColumnSeparator() != null) {
rowTotalLength += row.getNumCols() * rowGroup.getColumnSeparator().length();
}
if (rowMaxTotalLength < rowTotalLength) {
rowMaxTotalLength = rowTotalLength;
}
}
rowGroupTotalLength += rowMaxTotalLength;
if (rowGroupMaxTotalLength < rowGroupTotalLength) {
rowGroupMaxTotalLength = rowGroupTotalLength;
}
}
return (int) (rowGroupMaxTotalLength * 1.1);
}
public String buildTable() {
StringBuffer stringBuffer = new StringBuffer();
for (RowGroup rowGroup : this.rowGroups) {
stringBuffer.append(rowGroup.buildRowGroup(isTabularResult));
}
return stringBuffer.toString();
}
public List buildTableList() {
List list = new ArrayList();
for (RowGroup rowGroup : this.rowGroups) {
list.add(rowGroup.buildRowGroup(isTabularResult));
}
return list;
}
@Override
public String toString() {
return "Table [rowGroups=" + rowGroups + "]";
}
}
/**
* A group of rows. Widths for all columns within a group will be the same and when built will
* automatically be set to the length of the longest value in the column.
*
* @since GemFire 7.0
*/
public static class RowGroup {
private final Table table;
private final List rows = new ArrayList();
private int[] colSizes;
private String columnSeparator;
private RowGroup(final Table table) {
this.table = table;
}
private Table getTable() {
return this.table;
}
public Row newRow() {
Row row = new Row(this);
rows.add(row);
return row;
}
public void newRowSeparator(Character character, boolean isTablewideSeparator) {
Row row = new Row(this, character, isTablewideSeparator);
rows.add(row);
}
public void newBlankRow() {
Row row = newRow();
row.newCenterCol("");
row.isBlank = true;
}
public String buildRowGroup(boolean isTabularResult) {
this.colSizes = computeColSizes(isTabularResult);
StringBuffer stringBuffer = new StringBuffer();
for (Row row : rows) {
String builtRow = row.buildRow(isTabularResult);
stringBuffer.append(builtRow);
if (!builtRow.trim().isEmpty() || row.isBlank) {
stringBuffer.append(GfshParser.LINE_SEPARATOR);
}
}
return stringBuffer.toString();
}
private int getColSize(final int colNum) {
return this.colSizes[colNum];
}
private int[] computeColSizes(boolean isTabularResult) {
int[] localColSizes = new int[getNumCols()];
for (int i = 0; i < localColSizes.length; i++) {
localColSizes[i] = getMaxColLength(i);
}
if (isTabularResult) {
localColSizes = TableBuilderHelper.recalculateColSizesForScreen(
TableBuilderHelper.getScreenWidth(), localColSizes, getColumnSeparator());
}
return localColSizes;
}
private int getNumCols() {
int maxNumCols = 0;
for (Row row : rows) {
int numCols = row.getNumCols();
if (numCols > maxNumCols) {
maxNumCols = numCols;
}
}
return maxNumCols;
}
private int getMaxColLength(final int colNum) {
int maxLength = 0;
for (Row row : rows) {
int colLength = row.getMaxColLength(colNum);
if (colLength > maxLength) {
maxLength = colLength;
}
}
return maxLength;
}
public void setColumnSeparator(final String columnSeparator) {
this.columnSeparator = columnSeparator;
}
public String getColumnSeparator() {
return this.columnSeparator != null ? this.columnSeparator : table.getColumnSeparator();
}
@Override
public String toString() {
return "RowGroup [rows=" + rows + "]";
}
}
public static class Row {
private final RowGroup rowGroup;
private final Character rowSeparator;
private final List columns = new ArrayList();
boolean isBlank;
private boolean isTablewideSeparator;
private String columnSeparator;
private Row(final RowGroup rowGroup) {
this.rowGroup = rowGroup;
this.rowSeparator = null;
}
private Row(final RowGroup rowGroup, final Character rowSeparator,
final boolean isTablewideSeparator) {
this.rowGroup = rowGroup;
this.rowSeparator = rowSeparator;
this.isTablewideSeparator = isTablewideSeparator;
}
public Row newLeftCol(Object value) {
Column column = new Column(value, Align.LEFT);
this.columns.add(column);
return this;
}
public Row newRightCol(Object value) {
Column column = new Column(value, Align.RIGHT);
this.columns.add(column);
return this;
}
public Row newCenterCol(Object value) {
Column column = new Column(value, Align.CENTER);
this.columns.add(column);
return this;
}
public boolean isEmpty() {
return columns.isEmpty();
}
private int getNumCols() {
return this.columns.size();
}
private int getMaxColLength(final int colNum) {
if (colNum >= this.columns.size())
return 0;
return this.columns.get(colNum).getLength();
}
public void setColumnSeparator(final String columnSeparator) {
this.columnSeparator = columnSeparator;
}
public String getColumnSeparator() {
return this.columnSeparator != null ? this.columnSeparator : rowGroup.getColumnSeparator();
}
private String buildRow(boolean isTabularResult) {
StringBuffer stringBuffer = new StringBuffer();
if (this.rowSeparator != null) {
if (isTablewideSeparator) {
int maxColLength = this.rowGroup.getTable().getMaxLength();
// Trim only for tabular results
if (isTabularResult) {
maxColLength = TableBuilderHelper.trimWidthForScreen(maxColLength);
}
for (int j = 0; j < maxColLength; j++) {
stringBuffer.append(this.rowSeparator);
}
} else {
int maxNumCols = this.rowGroup.getNumCols();
for (int i = 0; i < maxNumCols; i++) {
// int maxColLength = this.rowGroup.getMaxColLength(i);
int maxColLength = this.rowGroup.getColSize(i);
for (int j = 0; j < maxColLength; j++) {
stringBuffer.append(this.rowSeparator);
}
if (i < (maxNumCols - 1)) {
stringBuffer.append(this.rowGroup.getColumnSeparator());
}
}
}
} else {
// saj hook
for (int i = 0; i < this.columns.size(); i++) {
boolean lastColumn = !(i < (this.columns.size() - 1));
stringBuffer
.append(this.columns.get(i).buildColumn(this.rowGroup.getColSize(i), lastColumn));
if (!lastColumn) {
stringBuffer.append(getColumnSeparator());
}
}
}
return stringBuffer.toString();
}
@Override
public String toString() {
return "Row [columns=" + columns + "]";
}
}
private static enum Align {
LEFT, RIGHT, CENTER;
};
private static class Column {
private final Align align;
private final String stringValue;
private Column(final Object value, final Align align) {
if (value == null) {
this.stringValue = "";
} else {
this.stringValue = value.toString();
}
this.align = align;
}
private int getLength() {
return this.stringValue.length();
}
private String buildColumn(int colWidth, boolean trimIt) {
// If string value is greater than colWidth
// This can happen because colSizes are re-computed
// to fit the screen width
if (this.stringValue.length() > colWidth) {
StringBuffer stringBuffer = new StringBuffer();
int endIndex = colWidth - 2;
if (endIndex < 0)
return "";
return stringBuffer.append(stringValue.substring(0, endIndex)).append("..").toString();
}
int numSpaces = colWidth - this.stringValue.length();
if (trimIt)
numSpaces = 0;
StringBuffer stringBuffer = new StringBuffer();
switch (align) {
case LEFT:
stringBuffer.append(stringValue);
for (int i = 0; i < numSpaces; i++) {
stringBuffer.append(" ");
}
break;
case RIGHT:
for (int i = 0; i < numSpaces; i++) {
stringBuffer.append(" ");
}
stringBuffer.append(stringValue);
break;
case CENTER:
int i = 0;
for (; i < numSpaces / 2; i++) {
stringBuffer.append(" ");
}
stringBuffer.append(stringValue);
for (; i < numSpaces; i++) {
stringBuffer.append(" ");
}
break;
}
return stringBuffer.toString();
}
private String buildColumn(int colWidth) {
return buildColumn(colWidth, false);
}
@Override
public String toString() {
return "Column [align=" + align + ", stringValue=" + stringValue + "]";
}
}
}