Java String Indent Format indentMultilineValue(String value, StringBuilder tableInfo, int[] columnWidths, boolean printNull)

Description

comment indent processing for multi-line values values should be indented the same amount on each line if the first line comment starts indented by k, the following line comments should also be indented by k

License

Apache License

Parameter

Parameter	Description
value	the value to write
tableInfo	the buffer to write to
columnWidths	the widths of the previous columns
printNull	print null as a string, or do not print anything

Declaration

private static void indentMultilineValue(String value, StringBuilder tableInfo, int[] columnWidths,
        boolean printNull)

Method Source Code

//package com.java2s;
/**//from w w w.jav  a  2  s .c o m
 * 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.
 */

public class Main {
    public static final String FIELD_DELIM = "\t";
    public static final String LINE_DELIM = "\n";
    private static final int ALIGNMENT = 20;

    /**
     * comment indent processing for multi-line values
     * values should be indented the same amount on each line
     * if the first line comment starts indented by k,
     * the following line comments should also be indented by k
     * @param value the value to write
     * @param tableInfo the buffer to write to
     * @param columnWidths the widths of the previous columns
     * @param printNull print null as a string, or do not print anything
     */
    private static void indentMultilineValue(String value, StringBuilder tableInfo, int[] columnWidths,
            boolean printNull) {
        if (value == null) {
            if (printNull) {
                tableInfo.append(String.format("%-" + ALIGNMENT + "s", value));
            }
            tableInfo.append(LINE_DELIM);
        } else {
            String[] valueSegments = value.split("\n|\r|\r\n");
            tableInfo.append(String.format("%-" + ALIGNMENT + "s", valueSegments[0])).append(LINE_DELIM);
            for (int i = 1; i < valueSegments.length; i++) {
                printPadding(tableInfo, columnWidths);
                tableInfo.append(String.format("%-" + ALIGNMENT + "s", valueSegments[i])).append(LINE_DELIM);
            }
        }
    }

    /**
     * Print the rigth padding, with the given column widths
     * @param tableInfo The buffer to write to
     * @param columnWidths The column widths
     */
    private static void printPadding(StringBuilder tableInfo, int[] columnWidths) {
        for (int columnWidth : columnWidths) {
            if (columnWidth == 0) {
                tableInfo.append(FIELD_DELIM);
            } else {
                tableInfo.append(String.format("%" + columnWidth + "s" + FIELD_DELIM, ""));
            }
        }
    }
}