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package com.oracle.truffle.js.nodes.access;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.HostCompilerDirectives.InliningCutoff;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.dsl.NeverDefault;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.profiles.InlinedBranchProfile;
import com.oracle.truffle.api.profiles.InlinedConditionProfile;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.nodes.cast.JSToBooleanNode;
import com.oracle.truffle.js.nodes.cast.JSToPropertyKeyNode;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.nodes.interop.ForeignObjectPrototypeNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSArguments;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRuntime;
import com.oracle.truffle.js.runtime.builtins.JSProxy;
import com.oracle.truffle.js.runtime.interop.JSInteropUtil;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.Null;
import com.oracle.truffle.js.runtime.objects.Undefined;

@ImportStatic({JSProxy.class})
public abstract class JSProxyHasPropertyNode extends JavaScriptBaseNode {

    @Child protected GetMethodNode trapGetter;
    @Child private JSFunctionCallNode callNode;
    @Child private JSToBooleanNode toBooleanNode;
    @Child private JSToPropertyKeyNode toPropertyKeyNode;
    @Child private ForeignObjectPrototypeNode foreignObjectPrototypeNode;

    public JSProxyHasPropertyNode(JSContext context) {
        this.callNode = JSFunctionCallNode.createCall();
        this.trapGetter = GetMethodNode.create(context, JSProxy.HAS);
        this.toPropertyKeyNode = JSToPropertyKeyNode.create();
        this.toBooleanNode = JSToBooleanNode.create();
    }

    @NeverDefault
    public static JSProxyHasPropertyNode create(JSContext context) {
        return JSProxyHasPropertyNodeGen.create(context);
    }

    public abstract boolean executeWithTargetAndKeyBoolean(Object shared, Object key);

    @Specialization
    protected boolean doGeneric(JSDynamicObject proxy, Object key,
                    @Cached InlinedConditionProfile trapFunProfile,
                    @Cached InlinedBranchProfile errorBranch) {
        assert JSProxy.isJSProxy(proxy);
        Object propertyKey = toPropertyKeyNode.execute(key);
        if (JSRuntime.isPrivateSymbol(propertyKey)) {
            return false;
        }
        JSDynamicObject handler = JSProxy.getHandler(proxy);
        if (handler == Null.instance) {
            errorBranch.enter(this);
            throw Errors.createTypeErrorProxyRevoked(JSProxy.HAS, this);
        }
        Object target = JSProxy.getTarget(proxy);
        Object trapFun = trapGetter.executeWithTarget(handler);
        if (trapFunProfile.profile(this, trapFun == Undefined.instance)) {
            if (JSDynamicObject.isJSDynamicObject(target)) {
                return JSObject.hasProperty((JSDynamicObject) target, propertyKey);
            } else {
                boolean result = JSInteropUtil.hasProperty(target, propertyKey);
                if (!result) {
                    result = maybeHasInPrototype(target, propertyKey);
                }
                return result;
            }
        } else {
            Object callResult = callNode.executeCall(JSArguments.create(handler, trapFun, target, propertyKey));
            boolean trapResult = toBooleanNode.executeBoolean(callResult);
            if (!trapResult) {
                if (!JSProxy.checkPropertyIsSettable(target, propertyKey)) {
                    errorBranch.enter(this);
                    throw Errors.createTypeError("Proxy can't successfully access a non-writable, non-configurable property", this);
                }
            }
            return trapResult;
        }
    }

    @InliningCutoff
    private boolean maybeHasInPrototype(Object target, Object propertyKey) {
        assert JSRuntime.isPropertyKey(propertyKey);
        if (getLanguage().getJSContext().getLanguageOptions().hasForeignObjectPrototype()) {
            if (foreignObjectPrototypeNode == null) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                foreignObjectPrototypeNode = insert(ForeignObjectPrototypeNode.create());
            }
            JSDynamicObject prototype = foreignObjectPrototypeNode.execute(target);
            return JSObject.hasProperty(prototype, propertyKey);
        }
        return false;
    }

}




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