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Diffstat (limited to 'src/main/java/org/apache/commons/lang3/builder/MultilineRecursiveToStringStyle.java')
-rw-r--r-- | src/main/java/org/apache/commons/lang3/builder/MultilineRecursiveToStringStyle.java | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/lang3/builder/MultilineRecursiveToStringStyle.java b/src/main/java/org/apache/commons/lang3/builder/MultilineRecursiveToStringStyle.java new file mode 100644 index 000000000..443282cd1 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/builder/MultilineRecursiveToStringStyle.java @@ -0,0 +1,217 @@ +/* + * 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" {@code toString}. + * But instead a single line like the {@link RecursiveToStringStyle} this creates a multiline String + * similar to the {@link ToStringStyle#MULTI_LINE_STYLE}. + * + * <p>To use this class write code as follows:</p> + * + * <pre> + * 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(); + * } + * } + * </pre> + * + * <p> + * This will produce a toString of the format:<br> + * <code>Person@7f54[ <br> + * name=Stephen, <br> + * age=29, <br> + * smoker=false, <br> + * job=Job@43cd2[ <br> + * title=Manager <br> + * ] <br> + * ] + * </code> + * </p> + * + * @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() { + 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(); + } + +} |