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// Portions Copyright [2019] Payara Foundation and/or affiliates
package org.glassfish.admin.amx.util.jmx;
import javax.management.ObjectName;
import javax.management.openmbean.ArrayType;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.InvalidOpenTypeException;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import javax.management.openmbean.TabularData;
import java.io.Serializable;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.glassfish.admin.amx.util.TypeCast;
import org.glassfish.admin.amx.util.ArrayConversion;
import org.glassfish.admin.amx.util.IteratorUtil;
/**
Utilities dealing with OpenMBeans
*/
public final class OpenMBeanUtil
{
private OpenMBeanUtil()
{
}
private static volatile Map, SimpleType> SIMPLETYPES_MAP = null;
private static Map, SimpleType> getSimpleTypesMap()
{
if (SIMPLETYPES_MAP == null)
{
final Map, SimpleType> m = new HashMap, SimpleType>();
m.put(Byte.class, SimpleType.BYTE);
m.put(Short.class, SimpleType.SHORT);
m.put(Integer.class, SimpleType.INTEGER);
m.put(Long.class, SimpleType.LONG);
m.put(BigInteger.class, SimpleType.BIGINTEGER);
m.put(BigDecimal.class, SimpleType.BIGDECIMAL);
m.put(Float.class, SimpleType.FLOAT);
m.put(Double.class, SimpleType.DOUBLE);
m.put(Character.class, SimpleType.CHARACTER);
m.put(Boolean.class, SimpleType.BOOLEAN);
m.put(String.class, SimpleType.STRING);
m.put(Date.class, SimpleType.DATE);
m.put(Void.class, SimpleType.VOID);
m.put(ObjectName.class, SimpleType.OBJECTNAME);
SIMPLETYPES_MAP = m;
}
return (SIMPLETYPES_MAP);
}
/**
Get the SimpleType for a class which can be so-represented.
*/
public static SimpleType getSimpleType(final Class c) {
final SimpleType type = getSimpleTypesMap().get(c);
return (type);
}
/**
Get any non-null array element from the array.
*/
private static Object getAnyArrayElement(Object o)
{
Object result = null;
final int length = Array.getLength(o);
if (length != 0)
{
for (int i = 0; i < length; ++i)
{
final Object element = Array.get(o, 0);
if (element != null)
{
if (element.getClass().isArray())
{
result = getAnyArrayElement(element);
if (result != null)
{
break;
}
}
else
{
result = element;
break;
}
}
}
}
return (result);
}
private static int getArrayDimensions(final Class theClass)
{
final String classname = theClass.getName();
int dim = 0;
while (classname.charAt(dim) == '[')
{
++dim;
}
return (dim);
}
/**
Exists to avoid warnings from multiple call sites.
JMX in JDK 1.5 does not have generic types for JMX, but does in JDK 1.6.
This makes it impossible to use generics so long as we're compiling with 1.5.
It also means we'll get warnings in JDK 1.6!
*/
@SuppressWarnings("unchecked") // no way to deal with them
public static ArrayType newArrayType(final int numItems, final OpenType type)
throws OpenDataException
{
return new ArrayType(numItems, type);
}
/**
Get the OpenType of an Object, which must conform to OpenType requirements.
*/
public static OpenType getOpenType(final Object o) throws InvalidOpenTypeException, OpenDataException {
if (o == null) {
// no OpenType for a null
throw new IllegalArgumentException();
}
OpenType type = getSimpleType(o.getClass());
if (type == null)
{
final Class theClass = o.getClass();
if (theClass.isArray())
{
final int dimensions = getArrayDimensions(theClass);
final Class elementClass = theClass.getComponentType();
final SimpleType simpleType = getSimpleType(elementClass);
if (simpleType != null)
{
type = newArrayType(dimensions, simpleType);
}
else
{
final Object element = getAnyArrayElement(o);
if (CompositeData.class.isAssignableFrom(elementClass))
{
if (element == null)
{
type = SimpleType.VOID;
}
else
{
type = newArrayType(dimensions, ((CompositeData) element).getCompositeType());
}
}
else if (TabularData.class.isAssignableFrom(elementClass))
{
if (element == null)
{
type = SimpleType.VOID;
}
else
{
type = newArrayType(dimensions, TabularData.class.cast(element).getTabularType());
}
}
}
}
else if (o instanceof CompositeData)
{
type = ((CompositeData) o).getCompositeType();
}
else if (o instanceof TabularData)
{
type = ((TabularData) o).getTabularType();
}
}
if (type == null)
{
throw new IllegalArgumentException(o.getClass().getName());
}
return (type);
}
/**
Convert certain types and return a new Map:
- Collection converts to an array
Nulls are not eliminated.
*/
public static Map convertTypes(final Map orig)
{
final Map result = new HashMap();
for (final Map.Entry me : orig.entrySet())
{
final String key = me.getKey();
final Serializable value = me.getValue();
if (value instanceof Collection)
{
final Collection c = TypeCast.asCollection(value);
Object[] newValue = IteratorUtil.toArray(c.iterator());
newValue = ArrayConversion.specializeArray(newValue);
result.put(key, newValue);
}
else
{
result.put(key, value);
}
}
return (result);
}
/**
Create a CompositeType from a Map. Each key in the map must be a String,
and each value must be a type consistent with OpenTypes.
@param typeName the arbitrary name of the OpenType to be used
@param description the arbitrary description of the OpenType to be used
@param map a Map keyed by String, whose values may not be null
*/
public static CompositeType mapToCompositeType(final String typeName, final String description, final Map map,
CompositeTypeFromNameCallback callback) throws OpenDataException {
final String[] itemNames = new String[map.keySet().size()];
map.keySet().toArray(itemNames);
final String[] itemDescriptions = new String[itemNames.length];
final OpenType[] itemTypes = new OpenType[itemNames.length];
for (int i = 0; i < itemNames.length; ++i) {
final String name = itemNames[i];
final Object value = map.get(name);
itemDescriptions[i] = "value " + name;
if (value == null) {
// force nulls to type String
itemTypes[i] = callback.getOpenTypeFromName(name);
} else {
itemTypes[i] = getOpenType(value);
}
}
final CompositeType type = new CompositeType(
typeName,
description,
itemNames,
itemDescriptions,
itemTypes);
return (type);
}
/**
Create a CompositeData from a Map. Each key in the map must be a String,
and each value must be a type consistent with OpenTypes.
@param typeName the arbitrary name of the OpenType to be used
@param description the arbitrary description of the OpenType to be used
@param map a Map keyed by String, whose values may not be null
*/
public static CompositeData mapToCompositeData(
final String typeName,
final String description,
final Map map)
throws OpenDataException
{
final CompositeType type = mapToCompositeType(typeName, description, map, null);
return (new CompositeDataSupport(type, map));
}
/**
Convert a CompositeData to a Map.
*/
public static Map compositeDataToMap(final CompositeData data)
{
final Map map = new HashMap();
final CompositeType type = data.getCompositeType();
final Set keySet = TypeCast.asSet(type.keySet());
for (String name : keySet)
{
map.put(name, (Serializable) data.get(name));
}
return (map);
}
/**
Get a CompositeType describing a CompositeData which has no elements.
*/
public static OpenType getStackTraceElementOpenType()
throws OpenDataException
{
final String[] itemNames = new String[]
{
"ClassName",
"FileName",
"LineNumber",
"IsNativeMethod",
};
final String[] descriptions = new String[]
{
"ClassName",
"FileName",
"LineNumber",
"IsNativeMethod",
};
final OpenType[] openTypes = new OpenType[itemNames.length];
openTypes[ 0] = SimpleType.STRING;
openTypes[ 1] = SimpleType.STRING;
openTypes[ 2] = SimpleType.INTEGER;
openTypes[ 3] = SimpleType.BOOLEAN;
return (new CompositeType(
StackTraceElement.class.getName(),
"StackTraceElement composite type",
itemNames,
descriptions,
openTypes));
}
/**
Get a CompositeType describing a CompositeData which has no elements.
*/
public static OpenType getThrowableOpenType(final Throwable t)
throws OpenDataException
{
final String[] itemNames = new String[]
{
"Message",
"Cause",
"StackTrace",
};
final String[] descriptions = new String[]
{
"The message from the Throwable",
"The cause (if any) from the Throwable",
"The stack trace from the Throwable",
};
final OpenType[] openTypes = new OpenType[itemNames.length];
openTypes[0] = SimpleType.STRING;
openTypes[1] = t.getCause() == null ? SimpleType.VOID : getThrowableOpenType(t.getCause());
openTypes[2] = newArrayType(t.getStackTrace().length,
getStackTraceElementOpenType());
return (new CompositeType(
t.getClass().getName(),
"Throwable composite type",
itemNames,
descriptions,
openTypes));
}
}