Add ability to build compound toStrings using superclass and delegates
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@137173 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne
parent
a2fd090995
commit
ecb4235c77
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@ -64,7 +64,7 @@ package org.apache.commons.lang.builder;
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* program to access.</p>
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: StandardToStringStyle.java,v 1.5 2002/11/17 21:46:42 scolebourne Exp $
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* @version $Id: StandardToStringStyle.java,v 1.6 2002/12/08 20:45:08 scolebourne Exp $
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*/
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public class StandardToStringStyle extends ToStringStyle {
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@ -359,6 +359,50 @@ public class StandardToStringStyle extends ToStringStyle {
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//---------------------------------------------------------------------
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/**
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* <p>Gets whether the field separator should be added at the start
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* of each buffer.</p>
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*
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* @return the fieldSeparatorAtStart flag
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*/
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public boolean isFieldSeparatorAtStart() {
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return super.isFieldSeparatorAtStart();
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}
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/**
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* <p>Sets whether the field separator should be added at the start
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* of each buffer.</p>
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*
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* @param fieldSeparatorAtStart the fieldSeparatorAtStart flag
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*/
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public void setFieldSeparatorAtStart(boolean fieldSeparatorAtStart) {
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super.setFieldSeparatorAtStart(fieldSeparatorAtStart);
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}
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//---------------------------------------------------------------------
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/**
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* <p>Gets whether the field separator should be added at the end
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* of each buffer.</p>
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*
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* @return fieldSeparatorAtEnd flag
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*/
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public boolean isFieldSeparatorAtEnd() {
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return super.isFieldSeparatorAtEnd();
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}
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/**
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* <p>Sets whether the field separator should be added at the end
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* of each buffer.</p>
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*
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* @param fieldSeparatorAtEnd the fieldSeparatorAtEnd flag
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*/
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public void setFieldSeparatorAtEnd(boolean fieldSeparatorAtEnd) {
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super.setFieldSeparatorAtEnd(fieldSeparatorAtEnd);
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}
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//---------------------------------------------------------------------
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/**
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* <p>Gets the text to output when <code>null</code> found.</p>
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*
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@ -88,13 +88,17 @@ import java.lang.reflect.Modifier;
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* </pre>
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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]</code></p>
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*
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* <p>To add the superclass <code>toString</code>, use {@link #appendSuper}.
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* To append the <code>toString</code> from an object that is delegated
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* to (or any other object), use {@link #appendToString}.</p>
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*
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* <p>Alternatively, there is a method that uses reflection to determine
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* the fields to test. Because these fields are usually private, the method,
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* <code>reflectionToString</code>, uses <code>Field.setAccessible</code> to
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* change the visibility of the fields. This will fail under a security manager,
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* unless the appropriate permissions are set up correctly. It is also
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* slower than testing explicitly.</p>
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* slower than testing explicitly and does not handle superclasses.</p>
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*
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* <p>A typical invocation for this method would look like:</p>
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* <pre>
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@ -107,7 +111,7 @@ import java.lang.reflect.Modifier;
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* the {@link ToStringStyle} passed into the constructor.</p>
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: ToStringBuilder.java,v 1.8 2002/11/17 21:46:42 scolebourne Exp $
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* @version $Id: ToStringBuilder.java,v 1.9 2002/12/08 20:45:08 scolebourne Exp $
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*/
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public class ToStringBuilder {
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@ -334,6 +338,59 @@ public class ToStringBuilder {
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//----------------------------------------------------------------------------
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/**
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* <p>Append the <code>toString</code> from the superclass.</p>
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*
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* <p>This method asumes that the superclass uses the same <code>ToStringStyle</code>
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* as this one.</p>
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*
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* <p>If the <code>superToString</code> is null, no change is made.</p>
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*
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* @param superToString the result of <code>super.toString()</code>
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* @return this
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*/
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public ToStringBuilder appendSuper(String superToString) {
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if (superToString != null) {
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style.appendSuper(buffer, superToString);
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}
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return this;
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}
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/**
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* <p>Append the <code>toString</code> from another object.</p>
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*
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* <p>This method is useful where a class delegates most of the implementation of
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* it's properties to another class. You can then call toString() on the other
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* class and pass the result into this method.</p>
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*
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* <pre>
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* private AnotherObject delegate;
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* private String fieldInThisClass;
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*
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* public String toString() {
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* return new ToStringBuilder(this).
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* appendToString(delegate.toString()).
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* append(fieldInThisClass).
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* toString();
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* }</pre>
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*
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* <p>This method asumes that the other object uses the same <code>ToStringStyle</code>
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* as this one.</p>
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*
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* <p>If the <code>toString</code> is null, no change is made.</p>
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*
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* @param toString the result of <code>toString()</code> on another object
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* @return this
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*/
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public ToStringBuilder appendToString(String toString) {
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if (toString != null) {
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style.appendToString(buffer, toString);
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}
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return this;
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}
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//----------------------------------------------------------------------------
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/**
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* <p>Append to the <code>toString</code> an <code>Object</code>
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* value.</p>
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@ -1015,6 +1072,15 @@ public class ToStringBuilder {
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//----------------------------------------------------------------------------
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/**
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* <p>Gets the <code>ToStringStyle</code> being used.</p>
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*
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* @return the <code>ToStringStyle</code> being used
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*/
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public ToStringStyle getStyle() {
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return style;
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}
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/**
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* <p>Gets the <code>StringBuffer</code> being populated.</p>
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*
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@ -1027,6 +1093,9 @@ public class ToStringBuilder {
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/**
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* <p>Returns the built <code>toString</code>.</p>
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*
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* <p>This method appends the end of the buffer, and can only be called once.
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* Use {@link #getStringBuffer} to get the current string state.</p>
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*
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* @return the String <code>toString</code>
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*/
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public String toString() {
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@ -80,7 +80,7 @@ import org.apache.commons.lang.SystemUtils;
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* the array length.</p>
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: ToStringStyle.java,v 1.7 2002/11/22 22:52:17 bayard Exp $
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* @version $Id: ToStringStyle.java,v 1.8 2002/12/08 20:45:08 scolebourne Exp $
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*/
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public abstract class ToStringStyle implements Serializable {
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@ -130,6 +130,14 @@ public abstract class ToStringStyle implements Serializable {
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* The field name value separator <code>'='</code>.
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*/
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private String fieldNameValueSeparator = "=";
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/**
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* Whether the field separator should be added before any other fields.
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*/
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private boolean fieldSeparatorAtStart = false;
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/**
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* Whether the field separator should be added after any other fields.
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*/
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private boolean fieldSeparatorAtEnd = false;
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/**
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* The field separator <code>','</code>.
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*/
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@ -187,6 +195,41 @@ public abstract class ToStringStyle implements Serializable {
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//----------------------------------------------------------------------------
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/**
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* <p>Append the superclass toString.</p>
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*
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* <p>A null <code>super.toString()</code> is ignored.</p>
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*
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* @param buffer the <code>StringBuffer</code> to populate
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* @param superToString the <code>super.toString()</code>
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*/
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public void appendSuper(StringBuffer buffer, String superToString) {
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appendToString(buffer, superToString);
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}
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/**
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* <p>Append a toString.</p>
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*
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* <p>A null <code>toString()</code> is ignored.</p>
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*
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* @param buffer the <code>StringBuffer</code> to populate
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* @param toString the <code>super.toString()</code>
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*/
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public void appendToString(StringBuffer buffer, String toString) {
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if (toString != null) {
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int pos1 = toString.indexOf(contentStart) + contentStart.length();
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int pos2 = toString.lastIndexOf(contentEnd);
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if (pos1 != pos2 && pos1 >= 0 && pos2 >= 0) {
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String data = toString.substring(pos1, pos2);
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if (fieldSeparatorAtStart) {
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removeLastFieldSeparator(buffer);
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}
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buffer.append(data);
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appendFieldSeparator(buffer);
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}
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}
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}
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/**
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* <p>Append the start of data indicator.</p>
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*
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@ -198,6 +241,9 @@ public abstract class ToStringStyle implements Serializable {
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appendClassName(buffer, object);
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appendIdentityHashCode(buffer, object);
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appendContentStart(buffer);
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if (fieldSeparatorAtStart) {
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appendFieldSeparator(buffer);
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}
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}
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/**
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@ -208,8 +254,33 @@ public abstract class ToStringStyle implements Serializable {
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* <code>toString</code> for, must not be <code>null</code>
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*/
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public void appendEnd(StringBuffer buffer, Object object) {
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if (fieldSeparatorAtEnd == false) {
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removeLastFieldSeparator(buffer);
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}
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appendContentEnd(buffer);
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}
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/**
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* <p>Remove the last field separator from the buffer</p>
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*
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* @param buffer the <code>StringBuffer</code> to populate
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*/
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protected void removeLastFieldSeparator(StringBuffer buffer) {
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int len = buffer.length();
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int sepLen = fieldSeparator.length();
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if (len > 0 && sepLen > 0 && len >= sepLen) {
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boolean match = true;
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for (int i = 0; i < sepLen; i++) {
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if (buffer.charAt(len - 1 - i) != fieldSeparator.charAt(sepLen - 1 - i)) {
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match = false;
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break;
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}
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}
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if (match) {
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buffer.setLength(len - sepLen);
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}
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}
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}
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//----------------------------------------------------------------------------
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@ -1217,11 +1288,6 @@ public abstract class ToStringStyle implements Serializable {
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* @param buffer the <code>StringBuffer</code> to populate
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*/
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protected void appendContentEnd(StringBuffer buffer) {
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int len = buffer.length();
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int sepLen = fieldSeparator.length();
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if (len > 0 && sepLen > 0 && len >= sepLen && buffer.charAt(len - 1) == fieldSeparator.charAt(sepLen - 1)) {
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buffer.setLength(len - sepLen);
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}
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buffer.append(contentEnd);
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}
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@ -1638,6 +1704,50 @@ public abstract class ToStringStyle implements Serializable {
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//---------------------------------------------------------------------
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/**
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* <p>Gets whether the field separator should be added at the start
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* of each buffer.</p>
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*
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* @return the fieldSeparatorAtStart flag
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*/
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protected boolean isFieldSeparatorAtStart() {
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return fieldSeparatorAtStart;
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}
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/**
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* <p>Sets whether the field separator should be added at the start
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* of each buffer.</p>
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*
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* @param fieldSeparatorAtStart the fieldSeparatorAtStart flag
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*/
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protected void setFieldSeparatorAtStart(boolean fieldSeparatorAtStart) {
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this.fieldSeparatorAtStart = fieldSeparatorAtStart;
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}
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//---------------------------------------------------------------------
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/**
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* <p>Gets whether the field separator should be added at the end
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* of each buffer.</p>
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*
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* @return fieldSeparatorAtEnd flag
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*/
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protected boolean isFieldSeparatorAtEnd() {
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return fieldSeparatorAtEnd;
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}
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/**
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* <p>Sets whether the field separator should be added at the end
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* of each buffer.</p>
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*
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* @param fieldSeparatorAtEnd the fieldSeparatorAtEnd flag
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*/
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protected void setFieldSeparatorAtEnd(boolean fieldSeparatorAtEnd) {
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this.fieldSeparatorAtEnd = fieldSeparatorAtEnd;
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}
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//---------------------------------------------------------------------
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/**
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* <p>Gets the text to output when <code>null</code> found.</p>
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*
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@ -1790,8 +1900,6 @@ public abstract class ToStringStyle implements Serializable {
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this.summaryObjectEndText = summaryObjectEndText;
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}
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//---------------------------------------------------------------------
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//----------------------------------------------------------------------------
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/**
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@ -1906,8 +2014,9 @@ public abstract class ToStringStyle implements Serializable {
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*/
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private MultiLineToStringStyle() {
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super();
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this.setContentStart("[" + SystemUtils.LINE_SEPARATOR + " ");
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this.setContentStart("[");
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this.setFieldSeparator(SystemUtils.LINE_SEPARATOR + " ");
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this.setFieldSeparatorAtStart(true);
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this.setContentEnd(SystemUtils.LINE_SEPARATOR + "]");
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}
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@ -65,7 +65,7 @@ import junit.textui.TestRunner;
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* Unit tests {@link org.apache.commons.lang.ToStringStyle}.
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: DefaultToStringStyleTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
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* @version $Id: DefaultToStringStyleTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
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*/
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public class DefaultToStringStyleTest extends TestCase {
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@ -102,6 +102,15 @@ public class DefaultToStringStyleTest extends TestCase {
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assertEquals(baseStr + "[]", new ToStringBuilder(base).toString());
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}
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public void testAppendSuper() {
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assertEquals(baseStr + "[]", new ToStringBuilder(base).appendSuper("Integer@8888[]").toString());
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assertEquals(baseStr + "[<null>]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").toString());
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assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[]").append("a", "hello").toString());
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assertEquals(baseStr + "[<null>,a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").append("a", "hello").toString());
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assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
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}
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public void testObject() {
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Integer i3 = new Integer(3);
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Integer i4 = new Integer(4);
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@ -67,7 +67,7 @@ import junit.textui.TestRunner;
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* Unit tests {@link org.apache.commons.lang.ToStringStyle}.
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: MultiLineToStringStyleTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
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* @version $Id: MultiLineToStringStyleTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
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*/
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public class MultiLineToStringStyleTest extends TestCase {
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@ -104,6 +104,15 @@ public class MultiLineToStringStyleTest extends TestCase {
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).toString());
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}
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public void testAppendSuper() {
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).appendSuper("Integer@8888[" + SystemUtils.LINE_SEPARATOR + "]").toString());
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + " <null>" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).appendSuper("Integer@8888[" + SystemUtils.LINE_SEPARATOR + " <null>" + SystemUtils.LINE_SEPARATOR + "]").toString());
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + " a=hello" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).appendSuper("Integer@8888[" + SystemUtils.LINE_SEPARATOR + "]").append("a", "hello").toString());
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + " <null>" + SystemUtils.LINE_SEPARATOR + " a=hello" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).appendSuper("Integer@8888[" + SystemUtils.LINE_SEPARATOR + " <null>" + SystemUtils.LINE_SEPARATOR + "]").append("a", "hello").toString());
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assertEquals(baseStr + "[" + SystemUtils.LINE_SEPARATOR + " a=hello" + SystemUtils.LINE_SEPARATOR + "]", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
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}
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public void testObject() {
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Integer i3 = new Integer(3);
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Integer i4 = new Integer(4);
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@ -65,7 +65,7 @@ import junit.textui.TestRunner;
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* Unit tests {@link org.apache.commons.lang.ToStringStyle}.
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*
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* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
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* @version $Id: NoFieldNamesToStringStyleTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
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* @version $Id: NoFieldNamesToStringStyleTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
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*/
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public class NoFieldNamesToStringStyleTest extends TestCase {
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@ -102,6 +102,15 @@ public class NoFieldNamesToStringStyleTest extends TestCase {
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assertEquals(baseStr + "[]", new ToStringBuilder(base).toString());
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}
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public void testAppendSuper() {
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assertEquals(baseStr + "[]", new ToStringBuilder(base).appendSuper("Integer@8888[]").toString());
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assertEquals(baseStr + "[<null>]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").toString());
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assertEquals(baseStr + "[hello]", new ToStringBuilder(base).appendSuper("Integer@8888[]").append("a", "hello").toString());
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assertEquals(baseStr + "[<null>,hello]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[hello]", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
|
||||
}
|
||||
|
||||
public void testObject() {
|
||||
Integer i3 = new Integer(3);
|
||||
Integer i4 = new Integer(4);
|
||||
|
|
|
|||
|
|
@ -65,7 +65,7 @@ import junit.textui.TestRunner;
|
|||
* Unit tests {@link org.apache.commons.lang.ToStringStyle}.
|
||||
*
|
||||
* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
|
||||
* @version $Id: SimpleToStringStyleTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
|
||||
* @version $Id: SimpleToStringStyleTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
|
||||
*/
|
||||
public class SimpleToStringStyleTest extends TestCase {
|
||||
|
||||
|
|
@ -101,6 +101,15 @@ public class SimpleToStringStyleTest extends TestCase {
|
|||
assertEquals("", new ToStringBuilder(base).toString());
|
||||
}
|
||||
|
||||
public void testAppendSuper() {
|
||||
assertEquals("", new ToStringBuilder(base).appendSuper("").toString());
|
||||
assertEquals("<null>", new ToStringBuilder(base).appendSuper("<null>").toString());
|
||||
|
||||
assertEquals("hello", new ToStringBuilder(base).appendSuper("").append("a", "hello").toString());
|
||||
assertEquals("<null>,hello", new ToStringBuilder(base).appendSuper("<null>").append("a", "hello").toString());
|
||||
assertEquals("hello", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
|
||||
}
|
||||
|
||||
public void testObject() {
|
||||
Integer i3 = new Integer(3);
|
||||
Integer i4 = new Integer(4);
|
||||
|
|
|
|||
|
|
@ -65,7 +65,7 @@ import junit.textui.TestRunner;
|
|||
* Unit tests {@link org.apache.commons.lang.ToStringStyle}.
|
||||
*
|
||||
* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
|
||||
* @version $Id: StandardToStringStyleTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
|
||||
* @version $Id: StandardToStringStyleTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
|
||||
*/
|
||||
public class StandardToStringStyleTest extends TestCase {
|
||||
|
||||
|
|
@ -117,6 +117,15 @@ public class StandardToStringStyleTest extends TestCase {
|
|||
assertEquals(baseStr + "[]", new ToStringBuilder(base).toString());
|
||||
}
|
||||
|
||||
public void testAppendSuper() {
|
||||
assertEquals(baseStr + "[]", new ToStringBuilder(base).appendSuper("Integer@8888[]").toString());
|
||||
assertEquals(baseStr + "[%NULL%]", new ToStringBuilder(base).appendSuper("Integer@8888[%NULL%]").toString());
|
||||
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[%NULL%,a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[%NULL%]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
|
||||
}
|
||||
|
||||
public void testObject() {
|
||||
Integer i3 = new Integer(3);
|
||||
Integer i4 = new Integer(4);
|
||||
|
|
|
|||
|
|
@ -65,7 +65,7 @@ import junit.textui.TestRunner;
|
|||
* Unit tests {@link org.apache.commons.lang.ToStringBuilder}.
|
||||
*
|
||||
* @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
|
||||
* @version $Id: ToStringBuilderTest.java,v 1.1 2002/09/17 22:07:50 scolebourne Exp $
|
||||
* @version $Id: ToStringBuilderTest.java,v 1.2 2002/12/08 20:48:46 scolebourne Exp $
|
||||
*/
|
||||
public class ToStringBuilderTest extends TestCase {
|
||||
|
||||
|
|
@ -167,6 +167,24 @@ public class ToStringBuilderTest extends TestCase {
|
|||
assertEquals(baseStr + "[value=5]", ToStringBuilder.reflectionToString(base));
|
||||
}
|
||||
|
||||
public void testAppendSuper() {
|
||||
assertEquals(baseStr + "[]", new ToStringBuilder(base).appendSuper("Integer@8888[]").toString());
|
||||
assertEquals(baseStr + "[<null>]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").toString());
|
||||
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[<null>,a=hello]", new ToStringBuilder(base).appendSuper("Integer@8888[<null>]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendSuper(null).append("a", "hello").toString());
|
||||
}
|
||||
|
||||
public void testAppendToString() {
|
||||
assertEquals(baseStr + "[]", new ToStringBuilder(base).appendToString("Integer@8888[]").toString());
|
||||
assertEquals(baseStr + "[<null>]", new ToStringBuilder(base).appendToString("Integer@8888[<null>]").toString());
|
||||
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendToString("Integer@8888[]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[<null>,a=hello]", new ToStringBuilder(base).appendToString("Integer@8888[<null>]").append("a", "hello").toString());
|
||||
assertEquals(baseStr + "[a=hello]", new ToStringBuilder(base).appendToString(null).append("a", "hello").toString());
|
||||
}
|
||||
|
||||
public void testObject() {
|
||||
Integer i3 = new Integer(3);
|
||||
Integer i4 = new Integer(4);
|
||||
|
|
|
|||
Loading…
Reference in New Issue