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 * except in compliance with the License. You may obtain a copy of
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package org.jruby.ext.jruby;

import java.util.Map;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.Block;
import org.jruby.runtime.ExecutionContext;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

@JRubyClass(name = "JRuby::FiberLocal")
public final class JRubyFiberLocal extends JRubyExecutionContextLocal {
    public static final ObjectAllocator ALLOCATOR = new ObjectAllocator() {

        public IRubyObject allocate(Ruby runtime, RubyClass type) {
            return new JRubyFiberLocal(runtime, type);
        }
    };

    public JRubyFiberLocal(Ruby runtime, RubyClass type) {
        super(runtime, type);
    }

    @JRubyMethod(name = "with_value", required = 1)
    public IRubyObject withValue(ThreadContext context, IRubyObject value, Block block) {
        final Map<Object, IRubyObject> contextVariables;
        contextVariables = getContextVariables(context);
        final IRubyObject old_value;
        old_value = contextVariables.get(this);
        contextVariables.put(this, value);
        try {
            return block.yieldSpecific(context);
        } finally {
            contextVariables.put(this, old_value);
        }
    }

    protected final ExecutionContext getExecutionContext(ThreadContext context) {
        final ExecutionContext fiber;
        fiber = context.getFiber();
        if (fiber != null) {
            return fiber;
        } else {
            /* root fiber */
            return context.getThread();
        }
    }
    
}
