Append values to StringBuilder if value is not null. - Java java.lang

Java examples for java.lang:StringBuilder

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Description

Append values to StringBuilder if value is not null.

Demo Code

/**//  w w  w  .jav a 2 s.  c o m
 * OpenSpotLight - Open Source IT Governance Platform
 *
 * Copyright (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA
 * or third-party contributors as indicated by the @author tags or express
 * copyright attribution statements applied by the authors.  All third-party
 * contributions are distributed under license by CARAVELATECH CONSULTORIA E
 * TECNOLOGIA EM INFORMATICA LTDA.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License  for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 ***********************************************************************
 * OpenSpotLight - Plataforma de Governan?a de TI de C?digo Aberto
 *
 * Direitos Autorais Reservados (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA
 * EM INFORMATICA LTDA ou como contribuidores terceiros indicados pela etiqueta
 * @author ou por expressa atribui??o de direito autoral declarada e atribu?da pelo autor.
 * Todas as contribui??es de terceiros est?o distribu?das sob licen?a da
 * CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA.
 *
 * Este programa ? software livre; voc? pode redistribu?-lo e/ou modific?-lo sob os
 * termos da Licen?a P?blica Geral Menor do GNU conforme publicada pela Free Software
 * Foundation.
 *
 * Este programa ? distribu?do na expectativa de que seja ?til, por?m, SEM NENHUMA
 * GARANTIA; nem mesmo a garantia impl?cita de COMERCIABILIDADE OU ADEQUA??O A UMA
 * FINALIDADE ESPECFICA. Consulte a Licen?a P?blica Geral Menor do GNU para mais detalhes.
 *
 * Voc? deve ter recebido uma c?pia da Licen?a P?blica Geral Menor do GNU junto com este
 * programa; se n?o, escreva para:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
//package com.java2s;
import java.util.List;

public class Main {
    public static void main(String[] argv) throws Exception {
        StringBuilder buffer = new StringBuilder();
        Object value = "java2s.com";
        Object values = "java2s.com";
        System.out.println(appendIfNotNull(buffer, value, values));
    }

    /**
     * Append values if value is not null.
     * 
     * @param buffer the buffer
     * @param value the value
     * @param values the values
     * @return true, if successful
     */
    public static StringBuilder appendIfNotNull(final StringBuilder buffer,
            final Object value, final Object... values) {
        if (value != null) {
            for (final Object current : values) {
                if (current != null) {
                    buffer.append(current);
                }
            }
        }
        return buffer;
    }

    /**
     * Append values.
     * 
     * @param buffer the buffer
     * @param values the values
     * @return the string builder
     */
    public static StringBuilder append(final StringBuilder buffer,
            final List<?> values) {
        for (final Object value : values) {
            buffer.append(value);
        }
        return buffer;
    }

    /**
     * Append value if not null.
     * 
     * @param buffer the buffer
     * @param value the value
     * @return the string builder
     */
    public static StringBuilder append(final StringBuilder buffer,
            final Object value) {
        if (value != null) {
            buffer.append(value);
        }
        return buffer;
    }

    /**
     * Append values.
     * 
     * @param buffer the buffer
     * @param values the values
     * @return the string builder
     */
    public static StringBuilder append(final StringBuilder buffer,
            final Object... values) {
        for (final Object value : values) {
            buffer.append(value);
        }
        return buffer;
    }
}

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