Coverage Report - org.apache.commons.lang3.text.FormattableUtils
 
Classes in this File Line Coverage Branch Coverage Complexity
FormattableUtils
81%
13/16
93%
15/16
2
 
 1  
 /*
 2  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3  
  * contributor license agreements.  See the NOTICE file distributed with
 4  
  * this work for additional information regarding copyright ownership.
 5  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6  
  * (the "License"); you may not use this file except in compliance with
 7  
  * the License.  You may obtain a copy of the License at
 8  
  *
 9  
  *      http://www.apache.org/licenses/LICENSE-2.0
 10  
  *
 11  
  * Unless required by applicable law or agreed to in writing, software
 12  
  * distributed under the License is distributed on an "AS IS" BASIS,
 13  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14  
  * See the License for the specific language governing permissions and
 15  
  * limitations under the License.
 16  
  */
 17  
 package org.apache.commons.lang3.text;
 18  
 
 19  
 import static java.util.FormattableFlags.LEFT_JUSTIFY;
 20  
 
 21  
 import java.util.Formattable;
 22  
 import java.util.Formatter;
 23  
 
 24  
 import org.apache.commons.lang3.ObjectUtils;
 25  
 import org.apache.commons.lang3.StringUtils;
 26  
 import org.apache.commons.lang3.Validate;
 27  
 
 28  
 /**
 29  
  * <p>Provides utilities for working with the {@code Formattable} interface.</p>
 30  
  * 
 31  
  * <p>The {@link Formattable} interface provides basic control over formatting
 32  
  * when using a {@code Formatter}. It is primarily concerned with numeric precision
 33  
  * and padding, and is not designed to allow generalised alternate formats.</p>
 34  
  * 
 35  
  * @since Lang 3.0
 36  
  * @version $Id: FormattableUtils.java 1436770 2013-01-22 07:09:45Z ggregory $
 37  
  */
 38  
 public class FormattableUtils {
 39  
 
 40  
     /**
 41  
      * A format that simply outputs the value as a string.
 42  
      */
 43  
     private static final String SIMPLEST_FORMAT = "%s";
 44  
 
 45  
     /**
 46  
      * <p>{@code FormattableUtils} instances should NOT be constructed in
 47  
      * standard programming. Instead, the methods of the class should be invoked
 48  
      * statically.</p>
 49  
      * 
 50  
      * <p>This constructor is public to permit tools that require a JavaBean
 51  
      * instance to operate.</p>
 52  
      */
 53  
     public FormattableUtils() {
 54  0
         super();
 55  0
     }
 56  
 
 57  
     //-----------------------------------------------------------------------
 58  
     /**
 59  
      * Get the default formatted representation of the specified
 60  
      * {@code Formattable}.
 61  
      * 
 62  
      * @param formattable  the instance to convert to a string, not null
 63  
      * @return the resulting string, not null
 64  
      */
 65  
     public static String toString(final Formattable formattable) {
 66  0
         return String.format(SIMPLEST_FORMAT, formattable);
 67  
     }
 68  
 
 69  
     /**
 70  
      * Handles the common {@code Formattable} operations of truncate-pad-append,
 71  
      * with no ellipsis on precision overflow, and padding width underflow with
 72  
      * spaces.
 73  
      * 
 74  
      * @param seq  the string to handle, not null
 75  
      * @param formatter  the destination formatter, not null
 76  
      * @param flags  the flags for formatting, see {@code Formattable}
 77  
      * @param width  the width of the output, see {@code Formattable}
 78  
      * @param precision  the precision of the output, see {@code Formattable}
 79  
      * @return the {@code formatter} instance, not null
 80  
      */
 81  
     public static Formatter append(final CharSequence seq, final Formatter formatter, final int flags, final int width,
 82  
             final int precision) {
 83  10
         return append(seq, formatter, flags, width, precision, ' ', null);
 84  
     }
 85  
 
 86  
     /**
 87  
      * Handles the common {@link Formattable} operations of truncate-pad-append,
 88  
      * with no ellipsis on precision overflow.
 89  
      * 
 90  
      * @param seq  the string to handle, not null
 91  
      * @param formatter  the destination formatter, not null
 92  
      * @param flags  the flags for formatting, see {@code Formattable}
 93  
      * @param width  the width of the output, see {@code Formattable}
 94  
      * @param precision  the precision of the output, see {@code Formattable}
 95  
      * @param padChar  the pad character to use
 96  
      * @return the {@code formatter} instance, not null
 97  
      */
 98  
     public static Formatter append(final CharSequence seq, final Formatter formatter, final int flags, final int width,
 99  
             final int precision, final char padChar) {
 100  10
         return append(seq, formatter, flags, width, precision, padChar, null);
 101  
     }
 102  
 
 103  
     /**
 104  
      * Handles the common {@link Formattable} operations of truncate-pad-append,
 105  
      * padding width underflow with spaces.
 106  
      * 
 107  
      * @param seq  the string to handle, not null
 108  
      * @param formatter  the destination formatter, not null
 109  
      * @param flags  the flags for formatting, see {@code Formattable}
 110  
      * @param width  the width of the output, see {@code Formattable}
 111  
      * @param precision  the precision of the output, see {@code Formattable}
 112  
      * @param ellipsis  the ellipsis to use when precision dictates truncation, null or
 113  
      *  empty causes a hard truncation
 114  
      * @return the {@code formatter} instance, not null
 115  
      */
 116  
     public static Formatter append(final CharSequence seq, final Formatter formatter, final int flags, final int width,
 117  
             final int precision, final CharSequence ellipsis) {
 118  21
         return append(seq, formatter, flags, width, precision, ' ', ellipsis);
 119  
     }
 120  
 
 121  
     /**
 122  
      * Handles the common {@link Formattable} operations of truncate-pad-append.
 123  
      * 
 124  
      * @param seq  the string to handle, not null
 125  
      * @param formatter  the destination formatter, not null
 126  
      * @param flags  the flags for formatting, see {@code Formattable}
 127  
      * @param width  the width of the output, see {@code Formattable}
 128  
      * @param precision  the precision of the output, see {@code Formattable}
 129  
      * @param padChar  the pad character to use
 130  
      * @param ellipsis  the ellipsis to use when precision dictates truncation, null or
 131  
      *  empty causes a hard truncation
 132  
      * @return the {@code formatter} instance, not null
 133  
      */
 134  
     public static Formatter append(final CharSequence seq, final Formatter formatter, final int flags, final int width,
 135  
             final int precision, final char padChar, final CharSequence ellipsis) {
 136  61
         Validate.isTrue(ellipsis == null || precision < 0 || ellipsis.length() <= precision,
 137  
                 "Specified ellipsis '%1$s' exceeds precision of %2$s", ellipsis, Integer.valueOf(precision));
 138  60
         final StringBuilder buf = new StringBuilder(seq);
 139  60
         if (precision >= 0 && precision < seq.length()) {
 140  30
             final CharSequence _ellipsis = ObjectUtils.defaultIfNull(ellipsis, StringUtils.EMPTY);
 141  30
             buf.replace(precision - _ellipsis.length(), seq.length(), _ellipsis.toString());
 142  
         }
 143  60
         final boolean leftJustify = (flags & LEFT_JUSTIFY) == LEFT_JUSTIFY;
 144  156
         for (int i = buf.length(); i < width; i++) {
 145  96
             buf.insert(leftJustify ? i : 0, padChar);
 146  
         }
 147  60
         formatter.format(buf.toString());
 148  60
         return formatter;
 149  
     }
 150  
 
 151  
 }