Created
February 18, 2014 09:08
-
-
Save subchen/9067282 to your computer and use it in GitHub Desktop.
ToStringBuilder.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import java.lang.reflect.*; | |
public class ToStringBuilder { | |
private final StringBuilder sb = new StringBuilder(32); | |
private final Object object; | |
private final boolean formatted; | |
public static String reflection(Object object) { | |
return reflection(object, true); | |
} | |
public static String reflection(Object object, boolean formatted) { | |
ToStringBuilder builder = new ToStringBuilder(object, formatted); | |
Field[] fields = object.getClass().getDeclaredFields(); | |
AccessibleObject.setAccessible(fields, true); | |
for (Field field : fields) { | |
String fieldName = field.getName(); | |
if (field.getName().indexOf('$') != -1) { | |
continue; | |
} | |
if (Modifier.isTransient(field.getModifiers()) || (Modifier.isStatic(field.getModifiers()))) { | |
continue; | |
} | |
try { | |
Object fieldValue = field.get(object); | |
builder.append(fieldName, fieldValue); | |
} catch (IllegalAccessException e) { | |
throw new RuntimeException(e); | |
} | |
} | |
return builder.toString(); | |
} | |
public ToStringBuilder(Object object) { | |
this(object, true); | |
} | |
public ToStringBuilder(Object object, boolean formatted) { | |
this.object = object; | |
this.formatted = formatted; | |
} | |
public void append(String fieldName, Object value) { | |
if (value == null) { | |
value = "<null>"; | |
} else if (value.getClass().isArray()) { | |
int length = Array.getLength(value); | |
StringBuilder str = new StringBuilder(32); | |
str.append('['); | |
for (int i = 0; i < length; i++) { | |
if (i >= 10) { | |
str.append(",..."); | |
break; | |
} | |
if (i > 0) { | |
str.append(','); | |
} | |
str.append(Array.get(value, i)); | |
} | |
str.append(']'); | |
value = str.toString(); | |
} | |
if (formatted) { | |
sb.append(" ").append(fieldName).append(" = ").append(value).append('\n'); | |
} else { | |
if (sb.length() > 0) { | |
sb.append(';'); | |
} | |
sb.append(fieldName).append('=').append(value); | |
} | |
} | |
public String build() { | |
return toString(); | |
} | |
@Override | |
public String toString() { | |
if (formatted) { | |
return object.getClass().getName() + "[\n" + sb + ']'; | |
} else { | |
return object.getClass().getSimpleName() + '[' + sb + ']'; | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment