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package sun.management;

import java.lang.management.LockInfo;
import java.util.Map;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;

A CompositeData for LockInfo for the local management support. This class avoids the performance penalty paid to the construction of a CompositeData use in the local case.
/** * A CompositeData for LockInfo for the local management support. * This class avoids the performance penalty paid to the * construction of a CompositeData use in the local case. */
public class LockInfoCompositeData extends LazyCompositeData { @SuppressWarnings("serial") // Not statically typed as Serializable private final LockInfo lock; private LockInfoCompositeData(LockInfo li) { this.lock = li; } public LockInfo getLockInfo() { return lock; } public static CompositeData toCompositeData(LockInfo li) { if (li == null) { return null; } LockInfoCompositeData licd = new LockInfoCompositeData(li); return licd.getCompositeData(); } protected CompositeData getCompositeData() { Map<String,Object> items = Map.of( CLASS_NAME, lock.getClassName(), IDENTITY_HASH_CODE, lock.getIdentityHashCode() ); try { return new CompositeDataSupport(LOCK_INFO_COMPOSITE_TYPE, items); } catch (OpenDataException e) { // Should never reach here throw Util.newException(e); } } private static final CompositeType LOCK_INFO_COMPOSITE_TYPE; static { try { LOCK_INFO_COMPOSITE_TYPE = (CompositeType) MappedMXBeanType.toOpenType(LockInfo.class); } catch (OpenDataException e) { // Should never reach here throw Util.newException(e); } } static CompositeType compositeType() { return LOCK_INFO_COMPOSITE_TYPE; } private static final String CLASS_NAME = "className"; private static final String IDENTITY_HASH_CODE = "identityHashCode"; /* * Returns a LockInfo object mapped from the given CompositeData. */ public static LockInfo toLockInfo(CompositeData cd) { if (cd == null) { throw new NullPointerException("Null CompositeData"); } if (!isTypeMatched(LOCK_INFO_COMPOSITE_TYPE, cd.getCompositeType())) { throw new IllegalArgumentException( "Unexpected composite type for LockInfo"); } String className = getString(cd, CLASS_NAME); int identityHashCode = getInt(cd, IDENTITY_HASH_CODE); return new LockInfo(className, identityHashCode); } private static final long serialVersionUID = -6374759159749014052L; }