de.vandermeer.asciitable.commons.ArrayTransformations Maven / Gradle / Ivy

Go to download

/* Copyright 2014 Sven van der Meer 
 *
 * 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 de.vandermeer.asciitable.commons;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.text.StrBuilder;
import org.apache.commons.lang3.text.StrTokenizer;
import org.apache.commons.lang3.text.WordUtils;

/**
 * Collections array transformation methods.
 *
 * @author     Sven van der Meer <[email protected]>
 * @version    v1.0.0 build 160319 (19-Mar-16) for Java 1.7
 * @since      v0.0.1
 */
public abstract class ArrayTransformations {

	/**
	 * Takes a 2 dimensional array and returns a string representation in table form.
	 * @param  type of the input array
	 * @param ar the array to be transformed
	 * @return a string representation of the array
	 */
	public static final  StrBuilder ARRAY_TO_STRING(T[][] ar){
		StrBuilder ret = new StrBuilder(50);
		for(int row=0; row
	 * row 1: a1, b1, c1
	 * row 2: a2, b2, c2
	 * row 3: a3, b3, c3
	 *


	 * 
	 * The transformed table will be
	 * 	 * row 1: a1, a2, a3
	 * row 2: b1, b2, b3
	 * row 3: c1, c2, c3
	 * 
	 * 
	 * @param ar input array which will be flipped
	 * @return flipped array, null if input was null
	 */
	public static final String[][] FLIP_ARRAY(String[][] ar){
		if(ar==null){
			return null;
		}
		String[][] ret=new String[ar[0].length][ar.length];

		for(int i=0; i{@code
	String: "paragraph 1\nparagraph 2"
	Array:  {paragraph 1,paragraph 2}
	 * }
	 * A string containing 2 line breaks will be converted into 3 strings (first paragraph, additional line break, second paragraph):
	 * {@code
	String: "paragraph 1\n\nparagraph 2"
	Array: {paragraph 1,,paragraph 2}
	 * }
	 * 
	 * @param content the content to process
	 * @return null if content was null, empty array if content was an empty string, string array with lines otherwise
	 */
	public static final String[] PROCESS_CONTENT(Object content){
		if(content==null || content.toString()==null){
			return null;
		}
		if("".equals(content)){
			return new String[]{""};
		}

		String lfRep = StringUtils.replacePattern(content.toString(), "\\r\\n|\\r|\\n", "
");
		lfRep = StringUtils.replace(lfRep, "
", "
");
		StrTokenizer tok = new StrTokenizer(lfRep, "
").setIgnoreEmptyTokens(false);
		return tok.getTokenArray();
	}

	/**
	 * Takes an content array (of strings) and returns a string array with wrapped lines of max length using {@link #WRAP_LINES(int, Object)}.
	 * The wrapping is done using StringUtils and WordUtils so that words are not broken into characters.
	 * @param length max length of a string in the returned array
	 * @param ar array with one line per array entry, null and empty objects are allowed
	 * @return string array with wrapped strings: null of input object was null or its toString() returned null, empty array if empty string, array with lines of wrappings otherwise
	 */
	public static final String[] WRAP_LINES(final int length, String[] ar){
		if(ar==null){
			return null;
		}

		String[] ret = new String[0];
		for(int i=0; i