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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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package jdk.vm.ci.hotspot;

import java.lang.invoke.CallSite;
import java.util.Objects;

import jdk.vm.ci.meta.Assumptions;
import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.ResolvedJavaType;
import jdk.vm.ci.meta.VMConstant;

Represents a constant non-null object reference, within the compiler and across the compiler/runtime interface.
/** * Represents a constant non-{@code null} object reference, within the compiler and across the * compiler/runtime interface. */
public interface HotSpotObjectConstant extends JavaConstant, HotSpotConstant, VMConstant { @Override JavaConstant compress(); @Override JavaConstant uncompress();
Gets the resolved Java type of the object represented by this constant.
/** * Gets the resolved Java type of the object represented by this constant. */
HotSpotResolvedObjectType getType();
Gets the identity has code for the object represented by this constant.
/** * Gets the {@linkplain System#identityHashCode(Object) identity} has code for the object * represented by this constant. */
int getIdentityHashCode();
Gets the result of CallSite.getTarget() for the CallSite object represented by this constant.
Params:
  • assumptions – used to register an assumption that the CallSite's target does not change
Returns:null if this constant does not represent a CallSite object
/** * Gets the result of {@link CallSite#getTarget()} for the {@link CallSite} object represented * by this constant. * * @param assumptions used to register an assumption that the {@link CallSite}'s target does not * change * @return {@code null} if this constant does not represent a {@link CallSite} object */
JavaConstant getCallSiteTarget(Assumptions assumptions);
Determines if this constant represents an interned string.
/** * Determines if this constant represents an {@linkplain String#intern() interned} string. */
boolean isInternedString();
Gets the object represented by this constant represents if it is of a given type.
Params:
  • type – the expected type of the object represented by this constant. If the object is required to be of this type, then wrap the call to this method in Objects.requireNonNull(Object).
Returns:the object value represented by this constant if it is an instance of type otherwise null
/** * Gets the object represented by this constant represents if it is of a given type. * * @param type the expected type of the object represented by this constant. If the object is * required to be of this type, then wrap the call to this method in * {@link Objects#requireNonNull(Object)}. * @return the object value represented by this constant if it is an * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise * {@code null} */
<T> T asObject(Class<T> type);
Gets the object represented by this constant represents if it is of a given type.
Params:
  • type – the expected type of the object represented by this constant. If the object is required to be of this type, then wrap the call to this method in Objects.requireNonNull(Object).
Returns:the object value represented by this constant if it is an instance of type otherwise null
/** * Gets the object represented by this constant represents if it is of a given type. * * @param type the expected type of the object represented by this constant. If the object is * required to be of this type, then wrap the call to this method in * {@link Objects#requireNonNull(Object)}. * @return the object value represented by this constant if it is an * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise * {@code null} */
Object asObject(ResolvedJavaType type); @Override String toValueString(); }