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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.lang3.builder;

import org.apache.commons.lang3.ClassUtils;

/**
 * 

Works with {@link ToStringBuilder} to create a "deep" toString. * But instead a single line like the {@link RecursiveToStringStyle} this creates a multiline String * similar to the {@link ToStringStyle#MULTI_LINE_STYLE}.

* *

To use this class write code as follows:

* *
 * public class Job {
 *   String title;
 *   ...
 * }
 *
 * public class Person {
 *   String name;
 *   int age;
 *   boolean smoker;
 *   Job job;
 *
 *   ...
 *
 *   public String toString() {
 *     return new ReflectionToStringBuilder(this, new MultilineRecursiveToStringStyle()).toString();
 *   }
 * }
 * 
* *

* This will produce a toString of the format:
* Person@7f54[
*   name=Stephen,
*   age=29,
*   smoker=false,
*   job=Job@43cd2[
*     title=Manager
*   ]
* ] *
*

* * @since 3.4 */ public class MultilineRecursiveToStringStyle extends RecursiveToStringStyle { /** * Required for serialization support. * @see java.io.Serializable */ private static final long serialVersionUID = 1L; /** Indenting of inner lines. */ private static final int INDENT = 2; /** Current indenting. */ private int spaces = 2; /** * Constructor. */ public MultilineRecursiveToStringStyle() { super(); resetIndent(); } /** * Resets the fields responsible for the line breaks and indenting. * Must be invoked after changing the {@link #spaces} value. */ private void resetIndent() { setArrayStart("{" + System.lineSeparator() + spacer(spaces)); setArraySeparator("," + System.lineSeparator() + spacer(spaces)); setArrayEnd(System.lineSeparator() + spacer(spaces - INDENT) + "}"); setContentStart("[" + System.lineSeparator() + spacer(spaces)); setFieldSeparator("," + System.lineSeparator() + spacer(spaces)); setContentEnd(System.lineSeparator() + spacer(spaces - INDENT) + "]"); } /** * Creates a StringBuilder responsible for the indenting. * * @param spaces how far to indent * @return a StringBuilder with {spaces} leading space characters. */ private StringBuilder spacer(final int spaces) { final StringBuilder sb = new StringBuilder(); for (int i = 0; i < spaces; i++) { sb.append(" "); } return sb; } @Override public void appendDetail(final StringBuffer buffer, final String fieldName, final Object value) { if (!ClassUtils.isPrimitiveWrapper(value.getClass()) && !String.class.equals(value.getClass()) && accept(value.getClass())) { spaces += INDENT; resetIndent(); buffer.append(ReflectionToStringBuilder.toString(value, this)); spaces -= INDENT; resetIndent(); } else { super.appendDetail(buffer, fieldName, value); } } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final Object[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void reflectionAppendArrayDetail(final StringBuffer buffer, final String fieldName, final Object array) { spaces += INDENT; resetIndent(); super.reflectionAppendArrayDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final long[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final int[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final short[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final byte[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final char[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final double[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final float[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } @Override protected void appendDetail(final StringBuffer buffer, final String fieldName, final boolean[] array) { spaces += INDENT; resetIndent(); super.appendDetail(buffer, fieldName, array); spaces -= INDENT; resetIndent(); } }




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