Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.truffle.object/src/com/oracle/truffle/object/PropertyImpl.java @ 18408:2c3666f44855
Truffle: initial commit of object API implementation
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 18 Nov 2014 23:19:43 +0100 |
parents | |
children | de8880bbf2e1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.object/src/com/oracle/truffle/object/PropertyImpl.java Tue Nov 18 23:19:43 2014 +0100 @@ -0,0 +1,265 @@ +/* + * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * 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). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.oracle.truffle.object; + +import java.util.*; + +import com.oracle.truffle.api.object.*; +import com.oracle.truffle.object.Locations.*; + +/** + * Property objects represent the mapping between low-level stores and high-level data. The simplest + * Property could be nothing more than a map of one index to one property's value, but abstracting + * the interface allows for getter/setter methods, type-checked properties, and other such + * specialized and language-specific behavior. ECMAScript[8.6.1] + */ +public class PropertyImpl extends Property { + private final Object key; + private final Location location; + private final int flags; + private final boolean shadow; + private final boolean relocatable; + + /** + * Generic, usual-case constructor for properties storing at least a name. + * + * @param key the name of the property + */ + protected PropertyImpl(Object key, Location location, int flags, boolean shadow, boolean relocatable) { + this.key = Objects.requireNonNull(key); + this.location = Objects.requireNonNull(location); + this.flags = flags; + this.shadow = shadow; + this.relocatable = relocatable; + } + + public PropertyImpl(Object name, Location location, int flags) { + this(name, location, flags, false, true); + } + + @Override + public final Object getKey() { + return key; + } + + @Override + public int getFlags() { + return flags; + } + + @Override + public Property relocate(Location newLocation) { + if ((getLocation() == null || !getLocation().equals(newLocation)) && relocatable) { + return construct(getKey(), newLocation, getFlags()); + } + return this; + } + + @Override + public final Object get(DynamicObject store, Shape shape) { + return getLocation().get(store, shape); + } + + @Override + public final Object get(DynamicObject store, boolean condition) { + return getLocation().get(store, condition); + } + + @Override + public final void setInternal(DynamicObject store, Object value) { + try { + ((LocationImpl) getLocation()).setInternal(store, value); + } catch (IncompatibleLocationException e) { + throw new IllegalStateException(); + } + } + + @Override + public final void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException { + assert shape == null || store.getShape() == shape : "wrong shape"; + getLocation().set(store, value, shape); + } + + @Override + public final void setSafe(DynamicObject store, Object value, Shape shape) { + assert shape == null || store.getShape() == shape : "wrong shape"; + try { + getLocation().set(store, value, shape); + } catch (IncompatibleLocationException | FinalLocationException ex) { + throw new IllegalStateException(); + } + } + + @Override + public final void setGeneric(DynamicObject store, Object value, Shape shape) { + assert shape == null || store.getShape() == shape : "wrong shape"; + try { + set(store, value, shape); + } catch (IncompatibleLocationException | FinalLocationException ex) { + setSlowCase(store, value); + } + } + + @Override + public final void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException { + assert store.getShape() == oldShape : "wrong shape"; + assert newShape.isValid(); + assert getLocation() != null; + getLocation().set(store, value, oldShape, newShape); + } + + @Override + public final void setSafe(DynamicObject store, Object value, Shape oldShape, Shape newShape) { + assert store.getShape() == oldShape : "wrong old shape"; + assert newShape.isValid(); + assert getLocation() != null; + try { + getLocation().set(store, value, oldShape, newShape); + } catch (IncompatibleLocationException ex) { + throw new IllegalStateException(); + } + } + + @Override + public final void setGeneric(DynamicObject store, Object value, Shape oldShape, Shape newShape) { + assert store.getShape() == oldShape : "wrong old shape"; + assert newShape.isValid(); + assert getLocation() != null; + try { + getLocation().set(store, value, oldShape, newShape); + } catch (IncompatibleLocationException ex) { + setWithShapeSlowCase(store, value, oldShape, newShape); + } + } + + @Override + public boolean equals(Object obj) { + if (this == obj) { + return true; + } + if (obj == null) { + return false; + } + if (getClass() != obj.getClass()) { + return false; + } + + PropertyImpl other = (PropertyImpl) obj; + return key.equals(other.key) && ((location == null && other.location == null) || (location != null && location.equals(other.location))) && flags == other.flags && shadow == other.shadow && + relocatable == other.relocatable; + } + + @Override + public boolean isSame(Property obj) { + if (this == obj) { + return true; + } + if (obj == null) { + return false; + } + if (getClass() != obj.getClass()) { + return false; + } + + PropertyImpl other = (PropertyImpl) obj; + return key.equals(other.key) && flags == other.flags; + } + + @Override + public int hashCode() { + final int prime = 31; + int result = 1; + result = prime * result + getClass().hashCode(); + result = prime * result + key.hashCode(); + result = prime * result + (location != null ? location.hashCode() : 0); + result = prime * result + flags; + return result; + } + + @Override + public String toString() { + return "\"" + key + "\"" + ":" + location; + } + + @Override + public final Location getLocation() { + return location; + } + + private void setSlowCase(DynamicObject store, Object value) { + if (getLocation() instanceof DeclaredLocation) { + setDeclaredLocation(store, value); + } else { + generalize(store, value); + } + } + + private void setDeclaredLocation(DynamicObject store, Object value) { + store.updateShape(); + Shape oldShape = store.getShape(); + Shape newShape = oldShape.addProperty(this.relocateShadow(oldShape.allocator().locationForValue(value, EnumSet.of(LocationModifier.Final, LocationModifier.NonNull)))); + store.updateShape(); + newShape.getLastProperty().setGeneric(store, value, oldShape, newShape); + } + + private Property generalize(DynamicObject store, Object value) { + return ((LayoutImpl) store.getShape().getLayout()).getStrategy().generalizeProperty(store, this, value); + } + + private void setWithShapeSlowCase(DynamicObject store, Object value, Shape oldShape, Shape newShape) { + ((LayoutImpl) store.getShape().getLayout()).getStrategy().generalizeProperty(store, this, value, oldShape, newShape); + } + + @Override + public final boolean isHidden() { + return key instanceof HiddenKey; + } + + @Override + public final boolean isShadow() { + return shadow; + } + + private Property relocateShadow(Location newLocation) { + assert !isShadow() && getLocation() instanceof DeclaredLocation && relocatable; + return new PropertyImpl(getKey(), newLocation, flags, true, relocatable); + } + + @SuppressWarnings("hiding") + protected Property construct(Object name, Location location, int flags) { + return new PropertyImpl(name, location, flags, shadow, relocatable); + } + + @Override + public Property copyWithFlags(int newFlags) { + return construct(key, location, newFlags); + } + + @Override + public Property copyWithRelocatable(boolean newRelocatable) { + if (this.relocatable != newRelocatable) { + return new PropertyImpl(key, location, flags, shadow, newRelocatable); + } + return this; + } +}