99 lines
2.9 KiB
Java
99 lines
2.9 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.lang3.builder;
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import java.util.Collection;
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import org.apache.commons.lang3.ClassUtils;
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/**
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* <p>Works with {@link ToStringBuilder} to create a "deep" {@code toString}.</p>
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*
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* <p>To use this class write code as follows:</p>
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*
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* <pre>
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* public class Job {
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* String title;
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* ...
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* }
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*
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* public class Person {
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* String name;
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* int age;
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* boolean smoker;
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* Job job;
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*
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* ...
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*
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* public String toString() {
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* return new ReflectionToStringBuilder(this, new RecursiveToStringStyle()).toString();
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* }
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* }
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* </pre>
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*
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* <p>This will produce a toString of the format:
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* {@code Person@7f54[name=Stephen,age=29,smoker=false,job=Job@43cd2[title=Manager]]}</p>
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*
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* @since 3.2
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*/
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public class RecursiveToStringStyle extends ToStringStyle {
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/**
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* Required for serialization support.
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*
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* @see java.io.Serializable
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*/
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private static final long serialVersionUID = 1L;
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/**
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* <p>Constructor.</p>
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*/
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public RecursiveToStringStyle() {
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}
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@Override
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public void appendDetail(final StringBuffer buffer, final String fieldName, final Object value) {
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if (!ClassUtils.isPrimitiveWrapper(value.getClass()) &&
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!String.class.equals(value.getClass()) &&
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accept(value.getClass())) {
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buffer.append(ReflectionToStringBuilder.toString(value, this));
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} else {
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super.appendDetail(buffer, fieldName, value);
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}
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}
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@Override
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protected void appendDetail(final StringBuffer buffer, final String fieldName, final Collection<?> coll) {
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appendClassName(buffer, coll);
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appendIdentityHashCode(buffer, coll);
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appendDetail(buffer, fieldName, coll.toArray());
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}
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/**
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* Returns whether or not to recursively format the given {@code Class}.
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* By default, this method always returns {@code true}, but may be overwritten by
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* sub-classes to filter specific classes.
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*
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* @param clazz
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* The class to test.
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* @return Whether or not to recursively format the given {@code Class}.
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*/
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protected boolean accept(final Class<?> clazz) {
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return true;
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}
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}
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