garydgregory commented on a change in pull request #40: URL: https://github.com/apache/commons-csv/pull/40#discussion_r666366715
########## File path: src/main/java/org/apache/commons/csv/pretty/PrettyPrinter.java ########## @@ -0,0 +1,172 @@ +/* + * 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.commons.csv.pretty; + +import org.apache.commons.csv.CSVParser; +import org.apache.commons.csv.CSVRecord; +import org.apache.commons.lang3.StringUtils; + +import java.io.IOException; +import java.io.PrintStream; +import java.util.Iterator; +import java.util.List; + +/** + * Pretty printing utility + * + * @author Ali Ghanbari + */ +public class PrettyPrinter { + protected final List<CSVRecord> records; + protected final TableStyle style; + protected final PrintStream out; + protected final int[] spaces; + + public PrettyPrinter(final List<CSVRecord> records, final TableStyle style, final PrintStream out) { + this.records = records; + this.style = style; + this.out = out; + this.spaces = calculateSpaces(records); + } + + public PrettyPrinter(final CSVParser parser, final TableStyle style) throws IOException { + this.records = parser.getRecords(); + this.style = style; + this.out = System.out; + this.spaces = calculateSpaces(this.records); + } + + public PrettyPrinter(final CSVParser parser, final TableStyle style, final PrintStream out) throws IOException { + this.records = parser.getRecords(); + this.style = style; + this.out = out; + this.spaces = calculateSpaces(this.records); + } + + private int[] calculateSpaces(final List<CSVRecord> records) { + final int length = records.isEmpty() ? 0 : records.iterator().next().size(); + final int[] spaces = new int[length]; + for (int i = 0; i < length; i++) { + int max = Integer.MIN_VALUE; + for (final CSVRecord record : records) { + max = Math.max(record.get(i).length(), max); + } + spaces[i] = 2 + max; + } + return spaces; + } + + public List<CSVRecord> getRecords() { + return this.records; + } + + public TableStyle getStyle() { + return this.style; + } + + private void printUpperLine(final boolean thick, final char joint) { + if (this.spaces.length == 0) { + return; + } + out.print(thick ? this.style.THICK_UPPER_LEFT_CORNER_JOINT : this.style.THIN_UPPER_LEFT_CORNER_JOINT); + final char line = thick ? this.style.THICK_HORIZONTAL_LINE : this.style.THIN_HORIZONTAL_LINE; + final StringBuilder sb = new StringBuilder(); + for (final int sp : this.spaces) { + sb.append(StringUtils.repeat(line, sp)); + sb.append(joint); + } + out.print(sb.substring(0, sb.length() - 1)); + out.print(thick ? this.style.THICK_UPPER_RIGHT_CORNER_JOINT : this.style.THIN_UPPER_RIGHT_CORNER_JOINT); + } + + private void printMiddleLine(final boolean thickBorder, final boolean thickLine) { + if (this.spaces.length == 0) { + return; + } + out.print(thickBorder ? (thickLine ? this.style.THICK_THICK_LEFT_JOINT : this.style.THICK_LEFT_JOINT) : this.style.THIN_LEFT_JOINT); + final char line = thickLine ? this.style.THICK_HORIZONTAL_LINE : this.style.THIN_HORIZONTAL_LINE; + final char joint = thickLine ? this.style.THICK_MIDDLE_JOINT : this.style.THIN_MIDDLE_JOINT; + final StringBuilder sb = new StringBuilder(); + for (final int sp : this.spaces) { + sb.append(StringUtils.repeat(line, sp)); + sb.append(joint); + } + out.print(sb.substring(0, sb.length() - 1)); + out.print(thickBorder ? (thickLine ? this.style.THICK_THICK_RIGHT_JOINT : this.style.THICK_RIGHT_JOINT) : this.style.THIN_RIGHT_JOINT); + } + + private void printLowerLine(final boolean thick) { + if (this.spaces.length == 0) { + return; + } + out.print(thick ? this.style.THICK_LOWER_LEFT_CORNER_JOINT : this.style.THIN_LOWER_LEFT_CORNER_JOINT); + final char line = thick ? this.style.THICK_HORIZONTAL_LINE : this.style.THIN_HORIZONTAL_LINE; + final char joint = thick ? this.style.THICK_UPWARD_JOINT : this.style.THIN_UPWARD_JOINT; + final StringBuilder sb = new StringBuilder(); + for (final int sp : this.spaces) { + sb.append(StringUtils.repeat(line, sp)); + sb.append(joint); + } + out.print(sb.substring(0, sb.length() - 1)); + out.print(thick ? this.style.THICK_LOWER_RIGHT_CORNER_JOINT : this.style.THIN_LOWER_RIGHT_CORNER_JOINT); + } + + private void printRow(final CSVRecord record, final boolean thick, final char sep) { + if (this.spaces.length == 0) { + return; + } + out.print(thick ? this.style.THICK_VERTICAL_LINE : this.style.THIN_VERTICAL_LINE); + final StringBuilder sb = new StringBuilder(); + for (int i = 0; i < this.spaces.length; i++) { + final int sp = this.spaces[i]; + sb.append(StringUtils.center(record.get(i), sp, ' ')); + sb.append(sep); + } + out.print(sb.substring(0, sb.length() - 1)); + out.print(thick ? this.style.THICK_VERTICAL_LINE : this.style.THIN_VERTICAL_LINE); + } + + public void print(final boolean thickBorder, + final boolean distinguishHeader, + final boolean distinguishRows, + final boolean cellBorder) { + final Iterator<CSVRecord> recordIterator = this.records.iterator(); + if (!recordIterator.hasNext()) { + return; + } + printUpperLine(thickBorder, cellBorder ? (thickBorder ? this.style.THICK_DOWNWARD_JOINT : this.style.THIN_DOWNWARD_JOINT) : this.style.THICK_HORIZONTAL_LINE); Review comment: Changing "Upper/Lower" to "Start/End" is better IMO. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
