Here you can find the source of toLimitLengthString(final Collection
Parameter | Description |
---|---|
E | the type of the elements in the collection |
coll | the collection to transformed into string |
limit | the maximum number of elements to represented in the string |
public static <E> String toLimitLengthString(final Collection<E> coll, final int limit)
//package com.java2s; /*/*from w w w.ja va 2 s .co m*/ * Copyright (c) 2011 Stiftung Deutsches Elektronen-Synchrotron, * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY. * * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER. * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, * OR MODIFICATIONS. * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM */ import java.util.Collection; import java.util.Iterator; public class Main { /** * Creates a string representation according to the {@link java.util.AbstractCollection#toString()} * method, but with a limited length param. * Such that, if limit is >= the collection's size the original representation is returned, * otherwise the collection's representation ends after the limit-th element with * ",...]". * * @param <E> the type of the elements in the collection * @param coll the collection to transformed into string * @param limit the maximum number of elements to represented in the string * @return the (limited length) string representation */ public static <E> String toLimitLengthString(final Collection<E> coll, final int limit) { if (fallBackToStandardImplementation(coll, limit)) { return coll.toString(); } final Iterator<E> iter = coll.iterator(); final StringBuilder sb = new StringBuilder(); sb.append('['); final int min = Math.min(coll.size(), limit); for (int i = 0; i < min; i++) { final E e = iter.next(); sb.append(e == coll ? "(the collection itself)" : e); // recursive check, when an element is the collection itself if (!iter.hasNext() || i + 1 >= min) { return sb.append(",...]").toString(); } sb.append(", "); } return "[]"; } private static <E> boolean fallBackToStandardImplementation(final Collection<E> coll, final int limit) { return limit >= coll.size() || limit < 0 || coll.isEmpty(); } }