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// Portions Copyright [2019] Payara Foundation and/or affiliates
package org.glassfish.admin.amx.util.stringifier;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import org.glassfish.admin.amx.util.ArrayConversion;
import org.glassfish.admin.amx.util.ClassUtil;
/**
* Stringifies an Object in the "best" possible way, using the
* StringifierRegistry.DEFAULT registry and/or internal logic.
*/
public final class SmartStringifier implements Stringifier {
public static final SmartStringifier DEFAULT = new SmartStringifier(",");
private final String mMultiDelim;
private final boolean mEncloseArrays;
private StringifierRegistry mRegistry;
public SmartStringifier() {
this(",");
}
public SmartStringifier(String multiDelim) {
this(multiDelim, true);
}
public SmartStringifier(String multiDelim, boolean encloseArrays) {
this(StringifierRegistryImpl.DEFAULT, multiDelim, encloseArrays);
}
public SmartStringifier(StringifierRegistry registry, String multiDelim, boolean encloseArrays) {
mMultiDelim = multiDelim;
mEncloseArrays = encloseArrays;
mRegistry = registry;
}
public void setRegistry(StringifierRegistry registry) {
mRegistry = registry;
}
private static final Class[] STRINGIFIER_REGISTRY_LOOKUPS = {
Iterator.class,
Collection.class,
HashMap.class
};
private Stringifier getStringifier(final Object target) {
if (target == null) {
return (null);
}
final Class targetClass = target.getClass();
Stringifier stringifier = mRegistry.lookup(targetClass);
if (target instanceof javax.management.ObjectName) {
assert (stringifier != null);
}
if (stringifier == null) {
// exact match failed...look for match in defined order
final int numLookups = STRINGIFIER_REGISTRY_LOOKUPS.length;
for (int i = 0; i < numLookups; ++i) {
final Class theClass = STRINGIFIER_REGISTRY_LOOKUPS[ i];
stringifier = mRegistry.lookup(theClass);
if (stringifier != null && theClass.isAssignableFrom(target.getClass())) {
break;
}
}
}
if (stringifier == null) {
// see if there is a Stringifier for any superclass
Class tempClass = targetClass;
while (tempClass != Object.class) {
stringifier = mRegistry.lookup(tempClass);
if (stringifier != null) {
break;
}
tempClass = tempClass.getSuperclass();
}
}
if (stringifier == null) {
final Class[] interfaces = targetClass.getInterfaces();
if (interfaces.length != 0) {
stringifier = new InterfacesStringifier(interfaces);
}
}
return (stringifier);
}
private String smartStringify(Object target) {
String result = null;
if (ClassUtil.objectIsArray(target)) {
final Class elementClass =
ClassUtil.getArrayElementClass(target.getClass());
Object[] theArray = ClassUtil.isPrimitiveClass(elementClass) ?
ArrayConversion.toAppropriateType(target) :
(Object[]) target;
result = ArrayStringifier.stringify(theArray, mMultiDelim, this);
if (mEncloseArrays) {
result = "{" + result + "}";
}
} else {
Stringifier stringifier = getStringifier(target);
if (stringifier != null && stringifier.getClass() == this.getClass()) {
// avoid recursive call to self
stringifier = null;
}
if (stringifier != null) {
result = stringifier.stringify(target);
}
}
if (result == null) {
result = target.toString();
}
return (result);
}
public static String toString(Object target) {
return (DEFAULT.stringify(target));
}
@Override
public String stringify(Object target) {
if (target == null) {
return ("");
}
return (smartStringify(target));
}
}