/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package jdk.vm.ci.hotspot;

import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime;

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

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. */
abstract class HotSpotObjectConstantImpl implements HotSpotObjectConstant { protected final boolean compressed; HotSpotObjectConstantImpl(boolean compressed) { this.compressed = compressed; } @Override public JavaKind getJavaKind() { return JavaKind.Object; } @Override public boolean isCompressed() { return compressed; } @Override public abstract JavaConstant compress(); @Override public abstract JavaConstant uncompress(); @Override public HotSpotResolvedObjectType getType() { return runtime().reflection.getType(this); } @Override public abstract int getIdentityHashCode(); @Override public JavaConstant getCallSiteTarget(Assumptions assumptions) { if (runtime().getCallSite().isInstance(this)) { HotSpotObjectConstantImpl target = (HotSpotObjectConstantImpl) runtime().getHostJVMCIBackend().getConstantReflection().readFieldValue( HotSpotMethodHandleAccessProvider.Internals.instance().callSiteTargetField, this); if (!runtime().getConstantCallSite().isInstance(this)) { if (assumptions == null) { return null; } assumptions.record(new Assumptions.CallSiteTargetValue(this, target)); } return target; } return null; } @Override public boolean isInternedString() { return runtime().compilerToVm.isInternedString(this); } @Override public <T> T asObject(Class<T> type) { return runtime().reflection.asObject(this, type); } @Override public Object asObject(ResolvedJavaType type) { return runtime().reflection.asObject(this, (HotSpotResolvedJavaType) type); } @Override public boolean isNull() { return false; } @Override public boolean isDefaultForKind() { return false; } @Override public Object asBoxedPrimitive() { throw new IllegalArgumentException(); } @Override public int asInt() { throw new IllegalArgumentException(); } @Override public boolean asBoolean() { throw new IllegalArgumentException(); } @Override public long asLong() { throw new IllegalArgumentException(); } @Override public float asFloat() { throw new IllegalArgumentException(); } @Override public double asDouble() { throw new IllegalArgumentException(); } @Override public boolean equals(Object o) { if (o == this) { return true; } else if (o instanceof HotSpotObjectConstantImpl) { HotSpotObjectConstantImpl other = (HotSpotObjectConstantImpl) o; return runtime().reflection.equals(this, other); } return false; } @Override public int hashCode() { return getIdentityHashCode(); } @Override public String toValueString() { if (runtime().getJavaLangString().isInstance(this)) { return "\"" + runtime().reflection.asString(this) + "\""; } else { return runtime().reflection.formatString(this); } } @Override public String toString() { return (compressed ? "NarrowOop" : getJavaKind().getJavaName()) + "[" + runtime().reflection.formatString(this) + "]"; } public JavaConstant readFieldValue(HotSpotResolvedJavaField field, boolean isVolatile) { return runtime().reflection.readFieldValue(this, field, isVolatile); } public ResolvedJavaType asJavaType() { return runtime().reflection.asJavaType(this); } }