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package org.jruby.runtime.invokedynamic;

import org.jruby.ir.targets.Bootstrap;
import org.jruby.runtime.ivars.VariableAccessor;

import java.lang.invoke.CallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import java.lang.invoke.MutableCallSite;
import java.lang.invoke.SwitchPoint;

import org.jcodings.Encoding;
import org.jruby.*;
import org.jruby.internal.runtime.methods.DynamicMethod;
import org.jruby.runtime.Helpers;
import org.jruby.runtime.Block;
import org.jruby.runtime.CallType;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.callsite.CacheEntry;
import org.jruby.util.ByteList;
import org.jruby.util.RegexpOptions;

import org.jruby.util.log.Logger;
import org.jruby.util.log.LoggerFactory;
import static java.lang.invoke.MethodHandles.*;
import static java.lang.invoke.MethodType.*;
import org.jruby.internal.runtime.GlobalVariable;
import org.jruby.runtime.ivars.FieldVariableAccessor;
import org.jruby.runtime.opto.Invalidator;
import org.jruby.util.JavaNameMangler;
import org.jruby.util.cli.Options;

@SuppressWarnings("deprecation")
public class InvokeDynamicSupport {
    
    ////////////////////////////////////////////////////////////////////////////
    // method_missing support code
    ////////////////////////////////////////////////////////////////////////////

    public static boolean methodMissing(CacheEntry entry, CallType callType, String name, IRubyObject caller) {
        DynamicMethod method = entry.method;
        return method.isUndefined() || (callType == CallType.NORMAL && !name.equals("method_missing") && !method.isCallableFrom(caller, callType));
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject[] args) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, args, Block.NULL_BLOCK);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, Block.NULL_BLOCK);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, Block block) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, block);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg, Block.NULL_BLOCK);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject[] args, Block block) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, args, block);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg0, Block block) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg0, block);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg0, IRubyObject arg1) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg0, arg1, Block.NULL_BLOCK);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg0, IRubyObject arg1, Block block) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg0, arg1, block);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg0, IRubyObject arg1, IRubyObject arg2) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg0, arg1, arg2, Block.NULL_BLOCK);
    }

    public static IRubyObject callMethodMissing(CacheEntry entry, CallType callType, ThreadContext context, IRubyObject self, String name, IRubyObject arg0, IRubyObject arg1, IRubyObject arg2, Block block) {
        return Helpers.selectMethodMissing(context, self, entry.method.getVisibility(), name, callType).call(context, self, self.getMetaClass(), name, arg0, arg1, arg2, block);
    }
    
    ////////////////////////////////////////////////////////////////////////////
    // Dispatch support methods
    ////////////////////////////////////////////////////////////////////////////

    public static RubyClass pollAndGetClass(ThreadContext context, IRubyObject self) {
        context.callThreadPoll();
        RubyClass selfType = ((RubyBasicObject)self).getMetaClass();
        return selfType;
    }
    
    ////////////////////////////////////////////////////////////////////////////
    // Utility methods for lookup
    ////////////////////////////////////////////////////////////////////////////
    
    public static MethodHandle findStatic(Class target, String name, MethodType type) {
        try {
            return lookup().findStatic(target, name, type);
        } catch (NoSuchMethodException nsme) {
            throw new RuntimeException(nsme);
        } catch (IllegalAccessException nae) {
            throw new RuntimeException(nae);
        }
    }

    public static MethodHandle findVirtual(Class target, String name, MethodType type) {
        try {
            return lookup().findVirtual(target, name, type);
        } catch (NoSuchMethodException nsme) {
            throw new RuntimeException(nsme);
        } catch (IllegalAccessException nae) {
            throw new RuntimeException(nae);
        }
    }
}
