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Commons for lang, crypto, xml, dom, text, csv, reflection, annotations, parsing, ...

There is a newer version: 4.3.3

/*
 * tksCommons
 *
 * Author : Thomas Kuhlmann (ThK-Systems, http://www.thk-systems.de) License : LGPL (https://www.gnu.org/licenses/lgpl.html)
 */
package de.thksystems.util.lang;

import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

import de.thksystems.util.reflection.AnnotationUtils;

public final class ObjectUtils {

    private ObjectUtils() {
    }

    /**
     * Using {@link HashCodeBuilder#reflectionHashCode(Object, java.util.Collection)} and ignores all fields annotated with
     * {@link IgnoreForEquals}.
     */
    public static int buildHashCodeReflectiveConsideringAnnotations(Object obj) {
        return HashCodeBuilder.reflectionHashCode(obj, AnnotationUtils.getFieldNamesAnnotatedWith(obj, IgnoreForEquals.class));
    }

    /**
     * Using {@link EqualsBuilder#reflectionEquals(Object, Object, java.util.Collection)} and ignores all fields annotated with
     * {@link IgnoreForEquals}.
     */
    public static boolean buildEqualsReflectiveConsideringAnnotations(Object lhs, Object rhs) {
        return EqualsBuilder.reflectionEquals(lhs, rhs, AnnotationUtils.getFieldNamesAnnotatedWith(lhs, IgnoreForEquals.class));
    }

    /**
     * Using {@link ReflectionToStringBuilder} and ignores all fields annotated with {@link IgnoreForToString}.
     */
    public static String buildToStringReflectiveConsideringAnnotations(Object obj) {
        return ReflectionToStringBuilder.toStringExclude(obj, AnnotationUtils.getFieldNamesAnnotatedWith(obj, IgnoreForToString.class));
    }

    /**
     * Using {@link ReflectionToStringBuilder} and ignores all fields annotated with {@link IgnoreForToString}.
     */
    public static String buildToStringReflectiveConsideringAnnotations(Object obj, ToStringStyle style) {
        String[] ignoreList = AnnotationUtils.getFieldNamesAnnotatedWith(obj, IgnoreForToString.class);
        return new ReflectionToStringBuilder(obj, style).setExcludeFieldNames(ignoreList).toString();
    }
}