Mega Code Archive
Constructs pretty string representation of object value
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// Copyright (c) 2003-2009, Jodd Team (jodd.org). All Rights Reserved.
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
/**
* Constructs pretty string representation of object value.
*/
public class PrettyStringBuilder {
protected int maxArrayLen = 10;
protected int maxDeep = 3;
protected int deep;
protected String nullValue = "<null>";
public PrettyStringBuilder() {
}
public int getMaxArrayLen() {
return maxArrayLen;
}
public void setMaxArrayLen(int maxArrayLen) {
this.maxArrayLen = maxArrayLen;
}
public int getMaxDeep() {
return maxDeep;
}
public void setMaxDeep(int maxDeep) {
this.maxDeep = maxDeep;
}
public String getNullValue() {
return nullValue;
}
public void setNullValue(String nullValue) {
this.nullValue = nullValue;
}
/**
* Returns pretty value from object value.
*/
protected String toPrettyString(Object obj) {
deep++;
if (obj == null) {
deep--;
return nullValue;
}
if (deep == maxDeep) {
deep--;
return obj.toString();
}
StringBuilder s = new StringBuilder();
Class c = obj.getClass();
if (c.isArray()) {
int arrayLen = Array.getLength(obj);
int len = Math.min(arrayLen, maxArrayLen);
s.append('[');
for (int i = 0; i < len; i++) {
s.append(toPrettyString(Array.get(obj, i)));
if (i != len - 1) {
s.append(',');
}
}
if (len < arrayLen) {
s.append("...");
}
s.append(']');
} else if (obj instanceof Collection) {
Collection coll = (Collection) obj;
Iterator it = coll.iterator();
int i = 0;
s.append('(');
while ((it.hasNext() && (i < maxArrayLen))) {
s.append(toPrettyString(it.next()));
i++;
}
if (i < coll.size()) {
s.append("...");
}
s.append(')');
} else if (obj instanceof Map) {
Map map = (Map) obj;
Iterator it = map.keySet().iterator();
int i = 0;
s.append('{');
while ((it.hasNext() && (i < maxArrayLen))) {
Object key = it.next();
s.append(key).append(':');
s.append(toPrettyString(map.get(key)));
i++;
}
if (i < map.size()) {
s.append("...");
}
s.append('}');
} else {
s.append(obj.toString());
}
deep--;
return s.toString();
}
/**
* Returns pretty string representation of the object.
*/
public String toString(Object value) {
return toPrettyString(value);
}
}
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